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Your Vehicle  //  Porsche  //  997 (911) MK2 2009-2012  //  997 MKII Carrera C4 3.6L 2009-12
Porsche997 (911) MK2 2009-2012997 MKII Carrera C4 3.6L 2009-12Engine CoolingCoolant Hoses and Pipes (Rear engine cars)

Coolant Hoses - Engine Bay

Coolant Hoses - Engine Bay

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DISPLAYING 1 to 16 (of 28 products)
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Coolant Connection Piece Adapter & hose pipe. Porsche 997.2 Carrera / Turbo 2009-13 - 9A110613100, 9A110666001
4
Coolant Connection Piece Adapter & hose pipe. Porsche 997.2 Carrera / Turbo 2009-13
9A110613100KIT
Product Information
Product Information
Coolant Connection Piece Adapter & hose pipe 

The Genuine Porsche Coolant Connection Piece Adapter (Part Number: 9A110613100) and hose pipe ( Part Number:  9A110666001) these are original equipment engine cooling system component designed for selected Porsche 911 (997.2) Carrera and Turbo models.

Fits:

  • Porsche 997 MKII Carrera C2 3.6L 2009-12
  • Porsche 997 MKII Carrera C4 3.6L 2009-12
  • Porsche 997 MKII Carrera C2S 3.8L 2009-12
  • Porsche 997 MKII Carrera C4S 3.8L 2009-12
  • Porsche 997 MKII Turbo 2010-13  

Diagram Ref No 12, 15

Also referred to as an engine coolant pipe adapter, coolant connection piece or coolant outlet flange, this component forms part of the engine's coolant pipework and provides a secure connection between associated cooling system components.

Manufactured to Porsche's original equipment specifications, the adapter is designed to maintain the correct coolant flow path while providing a reliable, leak-resistant connection within the engine cooling circuit.

The Porsche 997.2 uses a liquid-cooled flat-six engine, which relies on continuous coolant circulation to regulate operating temperatures and prevent excessive heat accumulation.

During normal operation, the coolant pump circulates coolant through the engine and associated cooling components. The coolant absorbs engine heat and transfers it through the cooling system, allowing the engine to operate within its intended temperature range.

The coolant connection piece provides a defined passage and connection point within this system, helping maintain the integrity of the coolant circuit.

The component is listed in Porsche's engine assembly carrier and water pipe diagram, where it connects with the associated coolant pipework and retaining components.

During operation, the adapter is exposed to engine heat, coolant pressure, vibration and repeated temperature changes.

Over time, the connection piece or its associated sealing components may deteriorate through thermal cycling, corrosion, mechanical damage or incorrect installation.

A damaged adapter may allow coolant to escape, resulting in a gradual reduction in coolant level, visible leakage or cooling system pressure loss.

If coolant loss becomes severe, the engine may overheat, potentially causing significant mechanical damage.

Replacing a worn or damaged coolant connection piece with a Genuine Porsche component helps restore a secure coolant connection, maintain cooling system integrity and support reliable engine temperature regulation.

Ideal for coolant leak repairs, engine cooling system maintenance and Porsche 997.2 engine refurbishment, this Genuine Porsche adapter provides a factory-specified replacement for compatible vehicles.

What This Product Does:
The coolant connection piece adapter is part of the engine's liquid cooling system.

Its primary function is to provide a secure connection and passage between the designated coolant pipes and associated engine cooling components.

As coolant circulates through the engine, it absorbs heat from the engine's internal passages.

The heated coolant is then directed through the cooling circuit, allowing heat to be transferred away from the engine.

The adapter helps maintain the correct coolant pathway between its connected components.

Its main functions include:

  • Connecting coolant components: Provides the specified connection between the engine cooling circuit and associated pipework.
  • Maintaining coolant circulation: Allows coolant to pass through the intended connection.
  • Preventing coolant leakage: Supports a secure, leak-resistant joint when correctly fitted and sealed.
  • Maintaining cooling system pressure: Helps preserve the integrity of the pressurised coolant circuit.
  • Supporting engine temperature regulation: Contributes to the reliable circulation of coolant through the engine.
  • Providing correct pipe positioning: Maintains the specified connection geometry within the engine assembly.
  • Supporting reliable hose attachment: Works with the appropriate connected coolant hose or pipe arrangement.
  • Accommodating normal operating conditions: Functions within the designed temperature and pressure conditions of the cooling system.
  • Preserving factory cooling system routing: Maintains Porsche's intended coolant connection arrangement.
  • Supporting cooling system servicing: Allows a damaged connection piece to be replaced without unnecessarily replacing unrelated components.

The adapter does not circulate coolant independently.

Coolant movement is produced by the coolant pump, while operating temperature is regulated by the thermostat and associated cooling system components.

Symptoms Of Wear Or Failure:
The coolant connection piece is exposed to repeated temperature changes, cooling system pressure and engine vibration.

Although designed for long service life, the component or its associated seals may eventually deteriorate.

Common symptoms and signs of a faulty coolant connection piece include:

  • Visible coolant leakage: Coolant may escape from the adapter or its connection points.
  • Falling coolant level: The expansion tank may require frequent topping up because of coolant loss.
  • Coolant residue: Dried coolant deposits may appear around the adapter or nearby pipework.
  • Sweet coolant smell: Escaping coolant may produce a noticeable odour around the vehicle.
  • Coolant beneath the vehicle: Leaking coolant may drip onto surrounding components or the ground.
  • Engine temperature rising: Significant coolant loss may reduce the cooling system's ability to control engine temperature.
  • Coolant warning message: The vehicle may display a low coolant warning if the level drops sufficiently.
  • Loss of cooling system pressure: A defective connection may prevent the system from retaining its intended pressure.
  • Cracked adapter housing: Physical damage or ageing may cause cracks in the connection piece.
  • Damaged sealing surfaces: Scratches, corrosion or deformation may prevent the joint from sealing correctly.
  • Loose coolant connection: Damaged retaining components may affect the security of the connected pipe or hose.
  • Deteriorated sealing ring: A worn or displaced seal may allow coolant to escape even when the adapter itself remains intact.
  • Coolant leakage after servicing: Incorrect installation or disturbed seals may cause leakage following cooling system repairs.
  • Repeated coolant loss under pressure: Small leaks may become more noticeable when the engine reaches operating temperature.
  • Overheating during prolonged driving: Severe coolant loss may contribute to excessive engine temperatures.

Why Replacement Matters:
Replacing a defective coolant connection piece is important for maintaining the integrity of the engine cooling system.

A cracked, distorted or leaking adapter may allow coolant to escape, reducing the amount of coolant available to circulate through the engine.

Continued coolant loss can lead to overheating, particularly during demanding driving conditions or prolonged engine operation.

Excessive engine temperatures may damage seals, gaskets and other internal engine components.

Installing a Genuine Porsche replacement Coolant Connection Piece Adapter helps to:

  • Restore a secure coolant connection: Replace a damaged or leaking connection piece.
  • Prevent coolant leakage: Help maintain the correct seal between connected cooling system components.
  • Maintain cooling system pressure: Support the intended operation of the pressurised cooling circuit.
  • Preserve coolant circulation: Restore the correct passage between the associated coolant pipes.
  • Support engine temperature control: Help maintain reliable cooling system operation.
  • Reduce repeated coolant loss: Address leaks caused by a confirmed defective adapter.
  • Reduce overheating risk: Repair a known coolant leak before significant fluid loss occurs.
  • Restore correct pipe fitment: Maintain the specified connection geometry and component alignment.
  • Support reliable engine operation: Help preserve cooling system performance during normal driving.
  • Prevent further cooling system deterioration: Replace damaged components before leakage becomes more severe.
  • Support engine refurbishment: Provide an original equipment component during cooling system or engine repairs.
  • Preserve factory specifications: Maintain Porsche's intended coolant connection arrangement.
  • Maintain Genuine Porsche quality: Use an original equipment replacement designed for the relevant engine.

Replacement is particularly recommended where inspection confirms cracking, damaged sealing surfaces, deformation, insecure attachment or persistent leakage originating from the adapter.

The associated seals, retaining components and connected coolant pipes should also be inspected during replacement.



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9A110613100KIT
9A110613100
9A110666001

The product you are viewing cross references to these numbers
Coolant Connection Piece Adapter. Porsche 997.2 Carrera / Turbo 2009-13 - 9A110613100
2
Coolant Connection Piece Adapter. Porsche 997.2 Carrera / Turbo 2009-13
Special Order item
9A110613100
Product Information
Product Information
Coolant Connection Piece Adapter. 

The Genuine Porsche Coolant Connection Piece Adapter (Part Number: 9A110613100) is an original equipment engine cooling system component designed for selected Porsche 911 (997.2) Carrera and Turbo models.

Fits:

  • Porsche 997 MKII Carrera C2 3.6L 2009-12
  • Porsche 997 MKII Carrera C4 3.6L 2009-12
  • Porsche 997 MKII Carrera C2S 3.8L 2009-12
  • Porsche 997 MKII Carrera C4S 3.8L 2009-12
  • Porsche 997 MKII Turbo 2010-13  

Diagram Ref No 12

Also referred to as an engine coolant pipe adapter, coolant connection piece or coolant outlet flange, this component forms part of the engine's coolant pipework and provides a secure connection between associated cooling system components.

Manufactured to Porsche's original equipment specifications, the adapter is designed to maintain the correct coolant flow path while providing a reliable, leak-resistant connection within the engine cooling circuit.

The Porsche 997.2 uses a liquid-cooled flat-six engine, which relies on continuous coolant circulation to regulate operating temperatures and prevent excessive heat accumulation.

During normal operation, the coolant pump circulates coolant through the engine and associated cooling components. The coolant absorbs engine heat and transfers it through the cooling system, allowing the engine to operate within its intended temperature range.

The coolant connection piece provides a defined passage and connection point within this system, helping maintain the integrity of the coolant circuit.

The component is listed in Porsche's engine assembly carrier and water pipe diagram, where it connects with the associated coolant pipework and retaining components.

During operation, the adapter is exposed to engine heat, coolant pressure, vibration and repeated temperature changes.

Over time, the connection piece or its associated sealing components may deteriorate through thermal cycling, corrosion, mechanical damage or incorrect installation.

A damaged adapter may allow coolant to escape, resulting in a gradual reduction in coolant level, visible leakage or cooling system pressure loss.

If coolant loss becomes severe, the engine may overheat, potentially causing significant mechanical damage.

Replacing a worn or damaged coolant connection piece with a Genuine Porsche component helps restore a secure coolant connection, maintain cooling system integrity and support reliable engine temperature regulation.

Ideal for coolant leak repairs, engine cooling system maintenance and Porsche 997.2 engine refurbishment, this Genuine Porsche adapter provides a factory-specified replacement for compatible vehicles.

What This Product Does:
The coolant connection piece adapter is part of the engine's liquid cooling system.

Its primary function is to provide a secure connection and passage between the designated coolant pipes and associated engine cooling components.

As coolant circulates through the engine, it absorbs heat from the engine's internal passages.

The heated coolant is then directed through the cooling circuit, allowing heat to be transferred away from the engine.

The adapter helps maintain the correct coolant pathway between its connected components.

Its main functions include:

  • Connecting coolant components: Provides the specified connection between the engine cooling circuit and associated pipework.
  • Maintaining coolant circulation: Allows coolant to pass through the intended connection.
  • Preventing coolant leakage: Supports a secure, leak-resistant joint when correctly fitted and sealed.
  • Maintaining cooling system pressure: Helps preserve the integrity of the pressurised coolant circuit.
  • Supporting engine temperature regulation: Contributes to the reliable circulation of coolant through the engine.
  • Providing correct pipe positioning: Maintains the specified connection geometry within the engine assembly.
  • Supporting reliable hose attachment: Works with the appropriate connected coolant hose or pipe arrangement.
  • Accommodating normal operating conditions: Functions within the designed temperature and pressure conditions of the cooling system.
  • Preserving factory cooling system routing: Maintains Porsche's intended coolant connection arrangement.
  • Supporting cooling system servicing: Allows a damaged connection piece to be replaced without unnecessarily replacing unrelated components.

The adapter does not circulate coolant independently.

Coolant movement is produced by the coolant pump, while operating temperature is regulated by the thermostat and associated cooling system components.

Symptoms Of Wear Or Failure:
The coolant connection piece is exposed to repeated temperature changes, cooling system pressure and engine vibration.

Although designed for long service life, the component or its associated seals may eventually deteriorate.

Common symptoms and signs of a faulty coolant connection piece include:

  • Visible coolant leakage: Coolant may escape from the adapter or its connection points.
  • Falling coolant level: The expansion tank may require frequent topping up because of coolant loss.
  • Coolant residue: Dried coolant deposits may appear around the adapter or nearby pipework.
  • Sweet coolant smell: Escaping coolant may produce a noticeable odour around the vehicle.
  • Coolant beneath the vehicle: Leaking coolant may drip onto surrounding components or the ground.
  • Engine temperature rising: Significant coolant loss may reduce the cooling system's ability to control engine temperature.
  • Coolant warning message: The vehicle may display a low coolant warning if the level drops sufficiently.
  • Loss of cooling system pressure: A defective connection may prevent the system from retaining its intended pressure.
  • Cracked adapter housing: Physical damage or ageing may cause cracks in the connection piece.
  • Damaged sealing surfaces: Scratches, corrosion or deformation may prevent the joint from sealing correctly.
  • Loose coolant connection: Damaged retaining components may affect the security of the connected pipe or hose.
  • Deteriorated sealing ring: A worn or displaced seal may allow coolant to escape even when the adapter itself remains intact.
  • Coolant leakage after servicing: Incorrect installation or disturbed seals may cause leakage following cooling system repairs.
  • Repeated coolant loss under pressure: Small leaks may become more noticeable when the engine reaches operating temperature.
  • Overheating during prolonged driving: Severe coolant loss may contribute to excessive engine temperatures.

Why Replacement Matters:
Replacing a defective coolant connection piece is important for maintaining the integrity of the engine cooling system.

A cracked, distorted or leaking adapter may allow coolant to escape, reducing the amount of coolant available to circulate through the engine.

Continued coolant loss can lead to overheating, particularly during demanding driving conditions or prolonged engine operation.

Excessive engine temperatures may damage seals, gaskets and other internal engine components.

Installing a Genuine Porsche replacement Coolant Connection Piece Adapter helps to:

  • Restore a secure coolant connection: Replace a damaged or leaking connection piece.
  • Prevent coolant leakage: Help maintain the correct seal between connected cooling system components.
  • Maintain cooling system pressure: Support the intended operation of the pressurised cooling circuit.
  • Preserve coolant circulation: Restore the correct passage between the associated coolant pipes.
  • Support engine temperature control: Help maintain reliable cooling system operation.
  • Reduce repeated coolant loss: Address leaks caused by a confirmed defective adapter.
  • Reduce overheating risk: Repair a known coolant leak before significant fluid loss occurs.
  • Restore correct pipe fitment: Maintain the specified connection geometry and component alignment.
  • Support reliable engine operation: Help preserve cooling system performance during normal driving.
  • Prevent further cooling system deterioration: Replace damaged components before leakage becomes more severe.
  • Support engine refurbishment: Provide an original equipment component during cooling system or engine repairs.
  • Preserve factory specifications: Maintain Porsche's intended coolant connection arrangement.
  • Maintain Genuine Porsche quality: Use an original equipment replacement designed for the relevant engine.

Replacement is particularly recommended where inspection confirms cracking, damaged sealing surfaces, deformation, insecure attachment or persistent leakage originating from the adapter.

The associated seals, retaining components and connected coolant pipes should also be inspected during replacement.



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9A110613100
9A110613100

The product you are viewing cross references to these numbers
Coolant distributor. Porsche 997.2 / 992 / Boxster / Cayman - 0PB121187, 9A110601000, 9A110601001, 9A110601002
4
Coolant distributor. Porsche 997.2 / 992 / Boxster / Cayman
Special Order item
0PB121187
Product Information
Product Information
Distributor for coolant, Complete.

Fits:
Porsche 997.2 Carrera 2009-12
Porsche 997.2 Turbo 2010-13
Porsche 991.1 Carrera 2012-16
Porsche 991.2 Carrera 2017-19
Porsche 991 Turbo 2014-20
Porsche 992.1 Carrera 2019>>
Porsche 992 Turbo / Turbo S 2020>>

Porsche 987.2 Boxster 2.9L / 3.4L 2009-12
Porsche 981 Boxster 2012-16
Porsche 981 Boxster Spyder 2016
Porsche 982 (718) Boxster GTS 4.0L 2017>>
Porsche 982 (718) Boxster Spyder 2019>>

Porsche 987C.2 Cayman 2.9L / 3.4L 2009-12
Porsche 981C Cayman 2014-16
Porsche 981C Cayman GT4 2016
Porsche 982C (718C) Cayman GTS 4.0L 2017>>
Porsche 982C (718C) Cayman GT4 2019>>

Click 'Zoom in' for large parts diagram.
Diagram ref no 1

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

0PB121187
0PB121187
9A110601000
9A110601001
9A110601002

The product you are viewing cross references to these numbers
Coolant feed hose. Porsche 997.2 - 99710681230
3
Coolant feed hose. Porsche 997.2
Special Order item
99710681230
Product Information
Product Information
Coolant feed hose.

Fits:
Porsche 997.2 Carrera 2009-12
Porsche 997.2 Turbo 3.8L 2010-13

Click 'Zoom in' for large parts diagram.
Diagram ref no 23

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99710681230
99710681230

The product you are viewing cross references to these numbers
Coolant pipe seal. Porsche Boxster / Cayman / 991 / 992 - 9A110621500, 0PB121437
2
Coolant pipe seal. Porsche Boxster / Cayman / 991 / 992
Special Order item
0PB121437
Product Information
Product Information
Coolant pipe seal. Pipe to Water Pump & Thermostat Housing.

Fits:
Porsche 987.2 Boxster 2009-12
Porsche 981 Boxster 2012-16
Porsche 981 Boxster Spyder 2016
Porsche 982 Boxster GTS 4.0 2019>>
Porsche 982 Boxster Spyder 2019>>
Porsche 987C Cayman 2009-12
Porsche 981C Cayman 2014-16
Porsche 981C Cayman GT4
Porsche 982C Cayman GTS 4.0L 2019>>
Porsche 982C Cayman GT4 2019>>
Porsche 997.2 Carrera 2009-12
Porsche 997.2 Turbo 2010-13
Porsche 991.1 Carrera 2012-16
Porsche 991.2 Carrera 2017-19
Porsche 991 Turbo 2014-20
Porsche 991 GT3 1014>>
Porsche 992.1 Carrera 2020>>
Porsche 992 Turbo 2020>>

Click 'Zoom in' for large parts diagram.
Diagram ref no 12

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

0PB121437
9A110621500
0PB121437

The product you are viewing cross references to these numbers
Coolant Supply Hose. Porsche 997.2 Carrera / Turbo / GT2 RS 2009–13 - 9A110666001
2
Coolant Supply Hose. Porsche 997.2 Carrera / Turbo / GT2 RS 2009–13
Special Order item
9A110666001
Product Information
Product Information
Coolant Supply Hose.

The Porsche Coolant Supply Hose 9A110666001 is a genuine Porsche replacement water hose used within the engine cooling system on selected Porsche 997-generation 911 models.

Fits:

  • Porsche 997 MKII Carrera C2 3.6L 2009-12
  • Porsche 997 MKII Carrera C4 3.6L 2009-12
  • Porsche 997 MKII Carrera C2S 3.8L 2009-12
  • Porsche 997 MKII Carrera C4S 3.8L 2009-12
  • Porsche 997 MKII Turbo 2010-13
  • Porsche 997 MKII GT2 RS 2011-13  


Diagram Ref No 15

The hose forms part of the engine-side coolant pipework and carries pressurised coolant through the water-pipe assembly, helping maintain stable engine temperature under normal driving and high-load operating conditions.

What This Product Does:
The engine cooling system circulates coolant through the engine, radiators, thermostat and associated pipes to remove excess heat.

The coolant supply hose forms part of this sealed, pressurised circuit.

Its functions include:

  • Carrying engine coolant through the cooling system
  • Maintaining consistent coolant circulation
  • Supporting stable engine operating temperature
  • Connecting associated water-pipe and engine cooling components
  • Containing coolant under pressure
  • Helping prevent coolant loss
  • Supporting correct thermostat and water-pump operation
  • Maintaining the factory Porsche cooling-system layout

Although relatively small, a sound supply hose is essential for keeping the cooling circuit sealed and dependable.

Symptoms Of Wear Or Failure:
Coolant hoses deteriorate over time through heat, pressure, vibration and chemical exposure.

Possible signs of failure include:

  • Visible coolant leakage
  • Pink, white or coloured coolant residue around the hose
  • Dampness around hose connections
  • Cracks in the hose surface
  • Splitting around the ends
  • Swollen or bulging hose sections
  • Hose becoming unusually soft
  • Hose becoming hard or brittle
  • Coolant smell around the engine
  • Falling coolant level
  • Frequent need to top up coolant
  • Low-coolant warning
  • Engine-temperature fluctuations
  • Engine overheating
  • Steam from the engine area

A hose may also deteriorate internally without severe external cracking, so condition should be assessed carefully during cooling-system maintenance.


Why Replacement Matters:
A deteriorated coolant hose can eventually leak or rupture.

Because the cooling system operates under pressure, even a small split can lead to rapid coolant loss once the engine reaches operating temperature.

Continued driving with a failed hose may result in:

  • Loss of cooling-system pressure
  • Reduced coolant circulation
  • Engine overheating
  • Turbocharger heat-management problems
  • Damage to seals and gaskets
  • Cylinder-head damage
  • Severe engine damage in extreme cases
  • Vehicle breakdown

Replacing an aged or leaking hose restores the integrity of the cooling circuit and reduces the risk of sudden coolant loss.



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9A110666001
9A110666001

The product you are viewing cross references to these numbers
Cooling Water Tube - Return Line Porsche 997 MKII - 99710680901, 99710680902, 99710680900
2
Cooling Water Tube - Return Line Porsche 997 MKII
Special Order item
99710680902
Product Information
Product Information
Cooling Water Tube - Return Line.

Fits:
Porsche 997 MKI Carrera All.
997 Carrera 2 3.6L 2005>>
997 Carrera 2S 3.8L 2005>>
997 Carrera 4 3.6L 2005>>
997 Carrera 4S 3.8L 2005>>
Porsche 997 MKI Turbo

Porsche 997 MKII Carrera All. 2009>>
997 Carrera 2 3.6L 2009>>
997 Carrera 2S 3.8L 2009>>
997 Carrera 4 3.6L 2009>>
997 Carrera 4S 3.8L 2009>>
Porsche 997 MKII Turbo 2009>>

Diagram Ref no 7

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

99710680902
99710680901
99710680902
99710680900

The product you are viewing cross references to these numbers
Engine coolant hose, return. Porsche 997.2 / 981 Boxster / 981C Cayman - 9A110661501, 9A110661500
5
Engine coolant hose, return. Porsche 997.2 / 981 Boxster / 981C Cayman
Special Order item
9A110661501
Product Information
Product Information
Engine coolant hose, return.

Fits:
Porsche 987.2 Boxster 2.9L / 3.4L 2009-12
Porsche 981C.2 Cayman 2.9L / 3.4L 2009-12
Porsche 997.2 Carrera 2009-12
Porsche 991.1 Carrera 2012-16

Click 'Zoom in' for large parts diagram.
Diagram ref no 16

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9A110661501
9A110661501
9A110661500

The product you are viewing cross references to these numbers
Engine coolant hose, return. Porsche 997.2 / 981 Boxster / 981C Cayman - 9A110661501, 9A110661500
3
Engine coolant hose, return. Porsche 997.2 / 981 Boxster / 981C Cayman
9A110661501/1
Product Information
Product Information
Engine coolant hose - Return

Fits:
Porsche 987.2 Boxster 2.9ltr / 3.4ltr - 2009 to 2012
Porsche 981C.2 Cayman 2.9ltr / 3.4ltr - 2009 to 2012
Porsche 997.2 Carrera - 2009 to 2012
Porsche 991.1 Carrera - 2012 to 2016

Click 'Zoom in' for large parts diagram.
Diagram ref no 16

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9A110661501
9A110661501
9A110661500

The product you are viewing cross references to these numbers
Engine Coolant Inlet Flange Drain Plug. Porsche 981 / 982 / 987.2 / 991.1 / 991.2 / 992.1 / 992.2 / 997.2 - 0PB121099, 9A110654600
3
Engine Coolant Inlet Flange Drain Plug. Porsche 981 / 982 / 987.2 / 991.1 / 991.2 / 992.1 / 992.2 / 997.2
Special Order item
0PB121099
Product Information
Product Information
Engine Coolant Inlet Flange Drain Plug.
Sold Each.
x3 Required Per Car.

Fits:
Porsche 981 Boxster 2012>>2016
Porsche 981 Cayman 2014>>2016
Porsche 981 Boxster Spyder 2016>>2016
Porsche 982 Boxster GTS (718) 4.0L 2017>>
Porsche 982 Cayman GTS (718) 4.0L 2017>>
Porsche 982 Boxster Spyder (718) 2019>>
Porsche 987.2 Boxster MKII 2009>>2012
Porsche 987.2 Cayman MKII 2009>>2012
Porsche 991.1 Carrera MKI 2012>>2016
Porsche 991.2 Carrera MKII 2017>>2019
Porsche 991 Turbo / Turbo S / GT2 RS MKI / MKII 2014>>2020
Porsche 992.1 Carrera MKI 2019>>2024
Porsche 992.2 Carrera 2 3.0L MKII 2024>>
Porsche 992.1 Turbo / Turbo S MKI 2020>>
Porsche 997.2 Carrera MKII 2009>>2012
Porsche 997.2 Turbo / GT2 RS MKII 2010>>2013
Porsche 981 Cayman GT4 2016>>2016
Porsche 982 Cayman GT4 (718) 2019>>

Diagram Ref No 16

Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

0PB121099
0PB121099
9A110654600

The product you are viewing cross references to these numbers
Engine coolant return hose. Porsche 997.2 - 99710682231, 99710682232
3
Engine coolant return hose. Porsche 997.2
Special Order item
99710682232
Product Information
Product Information
Engine coolant return hose.

Fits:
Porsche 997.2 Carrera 2009 - 2012
Porsche 997.2 Turbo 3.8L 2010 - 2013 (A170)

Diagram ref no 22

Related reference numbers
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99710682232
99710682231
99710682232

The product you are viewing cross references to these numbers
Engine coolant supply hose. Porsche 997.2 Carrera C2 / C4 / C2S / C4S / Turbo - 99710683131
2
Engine coolant supply hose. Porsche 997.2 Carrera C2 / C4 / C2S / C4S / Turbo
Special Order item
99710683131
Product Information
Product Information

Engine coolant supply hose
Engine coolant supply hose by Porsche for the specified 997.2 Carrera and Turbo models. The supplied cooling diagrams identify this component as a supply hose within the engine coolant circuit.

Fits

  • Porsche 997.2 Carrera C2 3.6L 2009 – 2012
  • Porsche 997.2 Carrera C4 3.6L  2009 – 2012
  • Porsche 997.2 Carrera C2S 3.8L  2009 – 2012
  • Porsche 997.2 Carrera C4S 3.8L  2009 – 2012
  • Porsche 997.2 Turbo 2010 – 2013


Diagram ref no 1

What This Product Does

This hose carries coolant along the engine's supply circuit. It forms part of the fluid pathway used by the cooling system to manage engine temperature; it is not the return hose or a coolant pipe shown elsewhere in the assembly.


Functions

  • Provides a passage for coolant on the supply side.
  • Connects components within the engine cooling circuit.
  • Supports coolant movement needed for temperature regulation.


Technical Details

  • Porsche part number: 99710683131.
  • Component type: engine water/coolant hose.
  • Diagram identification: supply.


Symptoms of Fault

  • Falling coolant level or repeated coolant-level warnings.
  • Sweet-smelling coolant around the engine compartment.
  • Moisture, staining or dried deposits at hose connections.
  • Cracks, swelling or unusually soft areas in the hose.
  • Leakage becoming apparent after the engine is switched off.
  • Rising temperature readings, steam or gurgling.

These signs can also originate from other cooling components, so confirm the leak source before replacing the hose.


Why Replacement Matters

Age, repeated heating and cooling, and deterioration at connections can leave a hose unable to retain coolant. Renewing a confirmed damaged hose addresses that leakage and helps restore the coolant pathway. Inspect associated clamps, fittings and neighbouring hoses during the repair rather than assuming the hose alone explains every symptom.


FAQs

Why might leakage appear only when hot?
Changes in temperature and system pressure can reveal deterioration that is not apparent when cold.

How should a suspected leak be located?
A cooling-system pressure test, followed by inspection of hose ends and nearby fittings, can help identify its source.

Could gurgling indicate a hose problem?
Air entering through a leak or a low coolant level can cause gurgling, but the sound does not identify this hose specifically.

Should other components be checked?
Yes. Examine the clamps, connectors and surrounding cooling components for deterioration or additional leakage.



Related reference numbers
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99710683131
99710683131

The product you are viewing cross references to these numbers
O-Ring for Cooling System (46.7x3.53) - Several Applications. Porsche 987 / 981 / 718 / 996 / 997 / 991 - 99610680103
9
O-Ring for Cooling System (46.7x3.53) - Several Applications. Porsche 987 / 981 / 718 / 996 / 997 / 991
Special Order item
99610680103
Product Information
Product Information
O-ring – 46.7 x 3.53 – used in various applications within the car's cooling system.

Fits:
Porsche 987 Boxster 2005-12
Porsche 987 Cayman 2006-12

Porsche 981 Boxster 2012-16 
Porsche 981 Boxster Spyder 2016 
Porsche 981 Cayman 2014-16 
Porsche 981 Cayman GT4 2016 

Porsche 718 (982) Boxster 2017>> 
Porsche 718 (982) Boxster Spyder 2019>>
Porsche 718 (982) Cayman 2017>>
Porsche 718 (982) Cayman GT4 2019>>

Porsche 996 GT3 / RS 1999-05
Porsche 996 Turbo / GT2 2001-05

Porsche 997 Carrera 2005-12
Porsche 997 Turbo / GT2 RS 2007-13
Porsche 997 GT3 / RS 2007-11

Porsche 991 Carrera 2012-19
Porsche 991 Turbo / GT2 RS 2014-20
Porsche 991 GT3 / RS 2014-21

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99610680103
99610680103

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O-Ring for Cooling System (46.7x3.53) - Several Applications. Porsche 987 / 981 / 718 / 996 / 997 / 991 - 99610680103 - ORS161125
9
O-Ring for Cooling System (46.7x3.53) - Several Applications. Porsche 987 / 981 / 718 / 996 / 997 / 991
99610680103/1
Product Information
Product Information
O-ring – 46.7 x 3.53 – used in various applications within the car's cooling system.

Fits:
Porsche 987 Boxster 2005-12
Porsche 987 Cayman 2006-12

Porsche 981 Boxster 2012-16 
Porsche 981 Boxster Spyder 2016 
Porsche 981 Cayman 2014-16 
Porsche 981 Cayman GT4 2016 

Porsche 718 (982) Boxster 2017>> 
Porsche 718 (982) Boxster Spyder 2019>>
Porsche 718 (982) Cayman 2017>>
Porsche 718 (982) Cayman GT4 2019>>

Porsche 996 GT3 / RS 1999-05
Porsche 996 Turbo / GT2 2001-05

Porsche 997 Carrera 2005-12
Porsche 997 Turbo / GT2 RS 2007-13
Porsche 997 GT3 / RS 2007-11

Porsche 991 Carrera 2012-19
Porsche 991 Turbo / GT2 RS 2014-20
Porsche 991 GT3 / RS 2014-21

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99610680103
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Regulating valve water cooling. Porsche 981 / 718 / 997.2 / 991 - 9P1317233, 99130757300
4
Regulating valve water cooling. Porsche 981 / 718 / 997.2 / 991
Special Order item
9P1317233
Product Information
Product Information
Regulating valve water cooling. 

Fits:
Porsche 981 Boxster - 2012 to 2016
Porsche 981 Cayman - 2013 to 2016
Porsche 718 Boxster - 2017 Onwards
Porsche 718 Cayman - 2017 Onwards
Porsche 997.2 - 2009 to 2012
Porsche 991 - 2012 to 2019

Click 'Zoom in' for large parts diagram.
Diagram ref no 4


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9P1317233
9P1317233
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Regulating Valve Water Cooling. Porsche 981 / 718 / 997.2 / 991 - 9P1317233, 99130757300 - 173433
3
Regulating Valve Water Cooling. Porsche 981 / 718 / 997.2 / 991
9P1317233/1
Product Information
Product Information
Regulating Valve Water Cooling.
This Regulating Valve Water Cooling is a OE MATCH Porsche component designed to control and regulate coolant flow within the engine’s water cooling system. Acting as a precision valve within the cooling circuit, it ensures that coolant is directed appropriately to maintain optimal engine operating temperatures under varying conditions.

Fits:
  • Porsche Boxster 981 2.7L 2012-16
  • Porsche Boxster 981 S / GTS 3.4L 2012-16
  • Porsche Boxster 981 Spyder 3.8L 2016
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  • Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
  • Porsche Boxster T 718 2.0L Manual (300 Bhp) 01/2019>>
  • Porsche Boxster T 718 2.0L PDK (300 Bhp) 01/2019>>
  • Porsche Boxster GTS 718 2.5L Manual (365 Bhp) 05/2017>>
  • Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>>
  • Porsche Boxster GTS 718 4.0L Manual (400 Bhp) 01/2019>>
  • Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>>
  • Porsche Boxster Spyder / Sypder RS 718 4.0L 01/2019>>
  • Porsche Boxster 25 Years 718 4.0L Manual (400 Bhp) 01/2020>>
  • Porsche Boxster 25 Years 718 4.0L PDK (400 Bhp) 01/2020>>
  • Porsche 997 MKII Carrera C2 3.6L 2009-12
  • Porsche 997 MKII Carrera C4 3.6L 2009-12
  • Porsche 997 MKII Carrera C2S 3.8L 2009-12
  • Porsche 997 MKII Carrera C4S 3.8L 2009-12
  • Porsche 997 MKII GT3 2010-11
  • Porsche 997 MKII Turbo 2010-13
  • Porsche 997 MKII GT2 RS 2011-13
  • Porsche 991.1 Carrera C2 3.4L (350 Bhp) 2012-16
  • Porsche 991.1 Carrera C2S / GTS 3.8L (400/430 Bhp) 2012-16
  • Porsche 991.1 Carrera C4 3.4L (350 Bhp) 2012-16
  • Porsche 991.1 Carrera C4S / GTS 3.8L (400/430 Bhp) 2012-16
  • Porsche 991.1 Turbo 3.8L (520 Bhp) 2014-16
  • Porsche 991.1 Turbo S 3.8L (560 Bhp) 2014-16
  • Porsche 991.1 R 4.0L (500 Bhp) 2016
  • Porsche 991.1 GT3 3.8L (475 Bhp) 2014-16
  • Porsche 991.1 GT3 RS 4.0L (500 Bhp) 2015-16
  • Porsche 991.2 Carrera 2 3.0L (370 Bhp) 2016-19
  • Porsche 991.2 Carrera 2S / GTS 3.0L (420/450 Bhp) 2016-19
  • Porsche 991.2 Carrera 4 3.0L (370 Bhp) 2016-19
  • Porsche 991.2 Carrera 4S / GTS 3.0L (420/450 Bhp) 2016-19
  • Porsche 991.2 Cabriolet 2 3.0L (370 Bhp) 2016-19
  • Porsche 991.2 Cabriolet 2S / GTS 3.0L (420/450 Bhp) 2016-19
  • Porsche 991.2 Cabriolet 4 3.0L (370 Bhp) 2016-19
  • Porsche 991.2 Cabriolet 4S / GTS 3.0L (420/450 Bhp) 2016-19
  • Porsche 991.2 Targa 4 3.0L (370 Bhp) 2016-19
  • Porsche 991.2 Targa 4S / GTS 3.0L (420/450 Bhp) 2016-19
  • Porsche 991.2 Turbo Coupe 3.8L (540 Bhp) 2016-19
  • Porsche 991.2 Turbo S Coupe 3.8L (580 Bhp) 2016-19
  • Porsche 991.2 Turbo Cabriolet 3.8L (540 Bhp) 2016-19
  • Porsche 991.2 Turbo S Cabriolet 3.8L (580 Bhp) 2016-19
  • Porsche 991.2 Speedster 4.0L (510Bhp) 2019
  • Porsche 991.2 GT3 4.0L (500 Bhp) / GT3 RS 4.0L (520 Bhp) 2017-19
  • Porsche 991.2 GT2 RS 3.8L PDK (700 bhp) 2018-19
  • Porsche Cayman 2.7L 981 2013-16
  • Porsche Cayman S / GTS 3.4L 981 2013-16
  • Porsche Cayman GT4 3.8L 2015-16
  • Porsche Cayman 718 2.0L Manual (300 Bhp)
  • Porsche Cayman 718 2.0L PDK (300 Bhp)
  • Porsche Cayman S 718 2.5L Manual (350 Bhp)
  • Porsche Cayman S 718 2.5L PDK (350 Bhp)
  • Porsche Cayman T 718 2.0L Manual (300 Bhp)
  • Porsche Cayman T 718 2.0L PDK (300 Bhp)
  • Porsche Cayman GTS 718 2.5L Manual (365 Bhp)
  • Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
  • Porsche Cayman GTS 718 4.0L Manual (400 Bhp)
  • Porsche Cayman GTS 718 4.0L PDK (400 Bhp)
  • Porsche Cayman GT4 718 4.0L / GT4 RS 718 4.0L  

Diagram Ref No 4

What This Product Does:
  • Regulates coolant flow within the engine cooling system
  • Maintains optimal engine temperature under all driving conditions
  • Directs coolant to different circuits as required
  • Supports efficient engine warm-up and cooling
  • Works with thermostats and other cooling components to balance system performance     


Symptoms Of Wear Or Failure:

  • Engine overheating or temperature fluctuations
  • Engine running too cool (inefficient operation)
  • Coolant leaks around the valve housing
  • Poor heater performance or inconsistent cabin temperature
  • Check engine light related to cooling system faults
  • Reduced engine efficiency due to improper temperature control  

Why Replacement Matters:
  • Restores proper coolant flow and temperature control
  • Prevents overheating and potential engine damage
  • Ensures optimal engine efficiency and fuel economy
  • Protects cooling system components from excessive stress
  • Maintains reliable operation of both engine and heating systems  



Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.

9P1317233
9P1317233
99130757300

The product you are viewing cross references to these numbers
DISPLAYING 1 to 16 (of 28 products)
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Also found on these pages
About Coolant Hoses - Engine Bay

Coolant Hoses – Engine Bay | Reliable Cooling for Peak Porsche Performance

Coolant hoses in the engine bay are critical components that circulate coolant between the radiator, water pump, and engine block — maintaining consistent operating temperatures and preventing overheating. These hoses carry coolant through high-pressure, high-temperature zones within the engine bay, ensuring your Porsche performs at its best, even under demanding conditions.

At Design911, we stock a wide range of genuine and manufacturer-quality engine bay coolant hoses for Porsche models including 911, Boxster, Cayman. Each hose is designed to fit perfectly, resist extreme temperatures, and deliver long-lasting performance — matching the quality, precision and reliability.

What Do Engine Bay Coolant Hoses Do?

Coolant hoses form part of your Porsche’s closed-loop cooling system. Their job is to:

  • Circulate coolant between the engine, radiator, and water pump.
  • Maintain engine temperature for optimal performance and emissions.
  • Support consistent coolant pressure during operation.
  • Prevent engine overheating and protect internal components from heat damage.

In high-performance engines, such as those found in Porsche vehicles, properly functioning hoses are essential for ensuring precise temperature control and long-term mechanical integrity.

Why Do Engine Bay Coolant Hoses Fail?

Over time, coolant hoses endure constant exposure to heat, vibration, and pressure, which can cause wear and eventual failure. Common causes include:

  • Rubber deterioration from heat cycling and coolant chemicals.
  • Cracking or hardening due to age and environmental factors.
  • Swelling or soft spots from internal coolant corrosion.
  • Leaks at connections caused by weakened hose ends or clamps.
  • Abrasion or rubbing against other engine components.

Symptoms of failure include coolant leaks, overheating, fluctuating temperature readings, or a noticeable smell of coolant in the engine bay.

Why Replace Faulty Coolant Hoses?

A damaged or leaking hose can cause rapid coolant loss and severe engine overheating. Replacing worn hoses ensures your Porsche’s cooling system functions reliably and efficiently.

Benefits of replacement include:

  • Restored coolant circulation and temperature control.
  • Prevention of leaks, overheating, and potential engine damage.
  • Improved reliability and performance under all driving conditions.
  • Manufacturer-quality construction and perfect fitment.

All hoses in this range are built using reinforced, high-grade rubber compounds designed to withstand extreme heat, pressure, and vibration — ensuring lasting durability and peace of mind.

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