Engine Block Hoses

Heating tube, Supply.



Fits:
Porsche 970 Panamera / S / Turbo / GTS 2010-16

Click 'Zoom in' for large parts diagram.
Diagram ref no 30

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Related, superseded, cross reference or alternative numbers for comparison.

97010641102

The product you are viewing cross references to these numbers

Hose connector y-piece.

Fits:
Porsche 970 Panamera 3.0L 2014-2016 
Porsche 95B Macan V6 Petrol 2014-2018
Porsche 95B.2 Macan 2019*

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Related, superseded, cross reference or alternative numbers for comparison.

7PP121237

The product you are viewing cross references to these numbers

O-Ring – 11 x 2.5mm Water Coolant Breather Line
Sold each

Maintain the integrity of your Porsche's cooling system with this Coolant Breather Line O-Ring.. Measuring 11 x 2.5mm, this factory-original sealing ring is designed to provide a reliable, leak-free seal between the coolant breather line and its associated components.

Fits:

• Porsche 957 Cayenne S / GTS 4.8L 2007-10
• Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
• Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
• Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
• Porsche 970.1 Panamera S V8 4.8L 2009-13
• Porsche 970.1 Panamera 4S V8 4.8L 2009-13
• Porsche 970.1 Panamera GTS V8 4.8L 2011-13
• Porsche 970.1 Panamera Turbo V8 4.8L 2009-13
• Porsche 970.1 Panamera Turbo S V8 4.8L 2009-13
• Porsche 970.1 Panamera Diesel V6 3.0L 2011-13
• Porsche 970.1 Panamera S Hybrid V6 3.0L 2011-13
• Porsche 970.2 Panamera V6 3.6L 2WD (310Hp) 2014-16
• Porsche 970.2 Panamera 4 V6 3.6L 4WD (310Hp) 2014-16
• Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD (420Hp) 2014-16
• Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD Executive 2014-16
• Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD (420Hp) 2014-16
• Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD Executive 2014-16
• Porsche 970.2 Panamera GTS V8 4.8L 4WD (440Hp) 2014-16
• Porsche 970.2 Panamera Turbo V8 4.8L (520Hp) 2014-16
• Porsche 970.2 Panamera Turbo V8 Executive 2014-16
• Porsche 970.2 Panamera Turbo S V8 4.8L 2014-16
• Porsche 95B.1 Macan GTS Petrol 3.0L V6 (360Bhp) 2014-18
• Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18

Diagram ref no 12

Although small, this sealing ring plays a vital role in maintaining the integrity of the cooling system. It creates a watertight seal between the breather line and its mating components, preventing coolant leaks while allowing the cooling system to maintain the correct operating pressure. Replacing ageing or damaged O-rings during cooling system maintenance helps prevent coolant loss, overheating and expensive engine repairs.

What Does the Water Coolant Breather Line O-Ring Do?

The coolant breather line O-ring seals the connection between coolant pipes and breather line fittings within the engine's cooling system.

Its functions include:

• Preventing coolant leaks.
• Maintaining cooling system pressure.
• Ensuring efficient coolant circulation.
• Preventing air from entering the cooling system.
• Supporting correct engine operating temperatures.
• Helping maximise cooling system efficiency.

A correctly sealing O-ring is essential for maintaining the performance and reliability of the engine cooling system.

Why Does the O-Ring Need Replacing?

Over time, coolant seals are subjected to constant temperature fluctuations and coolant exposure, causing them to deteriorate.

Common causes of failure include:

• Heat cycling.
• Age-related hardening.
• Loss of elasticity.
• Coolant chemical degradation.
• Damage during removal.
• Compression set after years of service.
• Cooling system repairs requiring seal replacement.

As with most sealing components, O-rings should always be replaced once removed.

Symptoms of a Failing Coolant Breather Line O-Ring

Signs of a worn or damaged seal include:

• Coolant leaks around the breather line.
• Pink, white or dried coolant residue.
• Low coolant warning messages.
• Frequent coolant top-ups.
• Sweet coolant smell from the engine bay.
• Reduced cooling system pressure.
• Small coolant drips after driving.

Replacing the O-ring at the first sign of leakage helps prevent overheating and further cooling system damage.

When Should the O-Ring Be Replaced?

Replacement is recommended whenever:

• The coolant breather pipe is removed.
• Cooling system components are replaced.
• A coolant leak is diagnosed.
• Carrying out thermostat or water pump repairs.
• Performing preventative cooling system maintenance.
• Rebuilding or servicing the engine.

Installing a new O-ring during reassembly ensures a reliable seal and reduces the risk of future coolant leaks.

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

99970758640

The product you are viewing cross references to these numbers

O-Ring – 11 x 2.5mm Water Coolant Breather Line
Sold each

Ensure a reliable, leak-free cooling system with this OE Match O-Ring, measuring 11 x 2.5mm. Designed as a direct replacement for the original seal used on the water coolant breather line.

Fits:

• Porsche 957 Cayenne S / GTS 4.8L 2007-10
• Porsche 957 Cayenne Turbo / Turbo S 4.8L 2007-10
• Porsche 958 Cayenne Turbo V8 4.8L Petrol (500Hp) 2010-17
• Porsche 958 Cayenne Turbo S V8 4.8L Petrol (550Hp) 2010-17
• Porsche 970.1 Panamera S V8 4.8L 2009-13
• Porsche 970.1 Panamera 4S V8 4.8L 2009-13
• Porsche 970.1 Panamera GTS V8 4.8L 2011-13
• Porsche 970.1 Panamera Turbo V8 4.8L 2009-13
• Porsche 970.1 Panamera Turbo S V8 4.8L 2009-13
• Porsche 970.1 Panamera Diesel V6 3.0L 2011-13
• Porsche 970.1 Panamera S Hybrid V6 3.0L 2011-13
• Porsche 970.2 Panamera V6 3.6L 2WD (310Hp) 2014-16
• Porsche 970.2 Panamera 4 V6 3.6L 4WD (310Hp) 2014-16
• Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD (420Hp) 2014-16
• Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD Executive 2014-16
• Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD (420Hp) 2014-16
• Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD Executive 2014-16
• Porsche 970.2 Panamera GTS V8 4.8L 4WD (440Hp) 2014-16
• Porsche 970.2 Panamera Turbo V8 4.8L (520Hp) 2014-16
• Porsche 970.2 Panamera Turbo V8 Executive 2014-16
• Porsche 970.2 Panamera Turbo S V8 4.8L 2014-16
• Porsche 95B.1 Macan GTS Petrol 3.0L V6 (360Bhp) 2014-18
• Porsche 95B.1 Macan Turbo 3.6L V6 (400Bhp) 2014-18

Diagram ref no 12

Although small, this sealing ring plays a vital role in maintaining the integrity of the cooling system. It creates a watertight seal between the breather line and its mating components, preventing coolant leaks while allowing the cooling system to maintain the correct operating pressure. Replacing ageing or damaged O-rings during cooling system maintenance helps prevent coolant loss, overheating and expensive engine repairs.

Manufactured from high-quality, coolant-resistant elastomer, this OE Match O-ring is designed to match the dimensions and performance of the original Porsche component for dependable long-term sealing.

What Does the Water Coolant Breather Line O-Ring Do?

The coolant breather line O-ring seals the connection between coolant pipes and breather line fittings within the engine's cooling system.

Its functions include:

• Preventing coolant leaks.
• Maintaining cooling system pressure.
• Ensuring efficient coolant circulation.
• Preventing air from entering the cooling system.
• Supporting correct engine operating temperatures.
• Helping maximise cooling system efficiency.

A correctly sealing O-ring is essential for maintaining the performance and reliability of the engine cooling system.

Why Does the O-Ring Need Replacing?

Over time, coolant seals are subjected to constant temperature fluctuations and coolant exposure, causing them to deteriorate.

Common causes of failure include:

• Heat cycling.
• Age-related hardening.
• Loss of elasticity.
• Coolant chemical degradation.
• Damage during removal.
• Compression set after years of service.
• Cooling system repairs requiring seal replacement.

As with most sealing components, O-rings should always be replaced once removed.

Symptoms of a Failing Coolant Breather Line O-Ring

Signs of a worn or damaged seal include:

• Coolant leaks around the breather line.
• Pink, white or dried coolant residue.
• Low coolant warning messages.
• Frequent coolant top-ups.
• Sweet coolant smell from the engine bay.
• Reduced cooling system pressure.
• Small coolant drips after driving.

Replacing the O-ring at the first sign of leakage helps prevent overheating and further cooling system damage.

When Should the O-Ring Be Replaced?

Replacement is recommended whenever:

• The coolant breather pipe is removed.
• Cooling system components are replaced.
• A coolant leak is diagnosed.
• Carrying out thermostat or water pump repairs.
• Performing preventative cooling system maintenance.
• Rebuilding or servicing the engine.

Installing a new O-ring during reassembly ensures a reliable seal and reduces the risk of future coolant leaks.

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

99970758640

The product you are viewing cross references to these numbers

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

99970182541

The product you are viewing cross references to these numbers

Vent Hose.


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

97010642202

The product you are viewing cross references to these numbers

Vent Hose.


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

97010642202

The product you are viewing cross references to these numbers

Vent Hose.
The Vent Hose is a genuine Porsche OEM coolant vent/overflow hose designed to route coolant vapours and excess pressure within the engine cooling system. This connector hose helps maintain correct cooling system balance by directing overflow coolant back to the reservoir, supporting stable coolant circulation and consistent engine temperature control. Manufactured to Porsche specifications, it provides precise fitment, durability, and long-term resistance to heat and coolant exposure for Porsche Panamera (970) models.

Fits:

• Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD (420Hp) 2014-16
• Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD Executive 2014-16
• Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD (420Hp) 2014-16
• Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD Executive 2014-16

  
Diagram Ref No 19 (Diagram Ref No 20 And 21 Included)

What This Product Does:

• Routes coolant vapours and excess coolant back toward the coolant expansion/reservoir tank.
• Helps maintain proper cooling system pressure balance during engine heating and cooling cycles.
  
• Supports stable coolant circulation, helping prevent air pockets and pressure build-up.
  
• Keeps the cooling system operating as a sealed, controlled loop to protect against coolant loss.

Symptoms Of Wear Or Failure:

• Coolant may seep from cracks or loose connections, leaving dried residue or wet staining around the hose.
• A leaking vent hose can cause gradual coolant loss, requiring frequent top-ups.
• Improper venting may cause unstable system pressure, contributing to overheating or erratic temperature readings.
• A noticeable coolant smell in the engine bay often indicates leakage from the vent/overflow line.
• Common signs include cracking or splitting, brittle or hardened rubber, loose or damaged fittings, discoloration from coolant exposure.
  
• Low coolant or temperature-related warnings may appear if the hose begins to fail.

Why Replacement Matters:

• Prevents coolant leaks that can lead to low coolant levels and reduced cooling efficiency.
  
• Maintains correct pressure balance within the cooling system during temperature changes.
  
• Helps prevent overheating, since coolant loss or trapped air can disrupt proper circulation.
  
• Protects surrounding components, as leaking coolant can damage hoses, sensors, wiring, and nearby engine parts.
  
• Restores reliable cooling system operation, ensuring overflow coolant is routed correctly back to the reservoir.

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

97010642260

The product you are viewing cross references to these numbers

Vent Hose.
The Vent Hose is a OE MATCH coolant vent/overflow hose designed to route coolant vapours and excess pressure within the engine cooling system. This connector hose helps maintain correct cooling system balance by directing overflow coolant back to the reservoir, supporting stable coolant circulation and consistent engine temperature control. It provides precise fitment, durability, and long-term resistance to heat and coolant exposure for Porsche Panamera (970) models.

Fits:

• Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD (420Hp) 2014-16
• Porsche 970.2 Panamera S V6 Turbo 3.0L 2WD Executive 2014-16
• Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD (420Hp) 2014-16
• Porsche 970.2 Panamera 4S V6 Turbo 3.0L 4WD Executive 2014-16

  
Diagram Ref No 19

What This Product Does:

• Routes coolant vapours and excess coolant back toward the coolant expansion/reservoir tank.
• Helps maintain proper cooling system pressure balance during engine heating and cooling cycles.
  
• Supports stable coolant circulation, helping prevent air pockets and pressure build-up.
  
• Keeps the cooling system operating as a sealed, controlled loop to protect against coolant loss.

Symptoms Of Wear Or Failure:

• Coolant may seep from cracks or loose connections, leaving dried residue or wet staining around the hose.
• A leaking vent hose can cause gradual coolant loss, requiring frequent top-ups.
• Improper venting may cause unstable system pressure, contributing to overheating or erratic temperature readings.
• A noticeable coolant smell in the engine bay often indicates leakage from the vent/overflow line.
• Common signs include cracking or splitting, brittle or hardened rubber, loose or damaged fittings, discoloration from coolant exposure.
  
• Low coolant or temperature-related warnings may appear if the hose begins to fail.

Why Replacement Matters:

• Prevents coolant leaks that can lead to low coolant levels and reduced cooling efficiency.
  
• Maintains correct pressure balance within the cooling system during temperature changes.
  
• Helps prevent overheating, since coolant loss or trapped air can disrupt proper circulation.
  
• Protects surrounding components, as leaking coolant can damage hoses, sensors, wiring, and nearby engine parts.
  
• Restores reliable cooling system operation, ensuring overflow coolant is routed correctly back to the reservoir.

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

97010642260

The product you are viewing cross references to these numbers

Vent line.



Fits:
Porsche 970 Panamera 2010-16

Click 'Zoom in' for large parts diagram.
Diagram ref no 13

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

97010631201

The product you are viewing cross references to these numbers

Vent line.



Fits:
Porsche 970 Panamera - 2010 to 2016

Click 'Zoom in' for large parts diagram.
Diagram ref no 13

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

97010631201

The product you are viewing cross references to these numbers

Water coolant hose - return.
This genuine OE hose routes coolant back to the engine’s cooling circuit, completing circulation from the engine back towards the overflow reservoir or cooling return path. It helps maintain correct engine temperature regulation by ensuring that coolant flows efficiently through the system, preventing overheating and supporting consistent thermal control under a wide range of driving conditions.

Fits:
Porsche 958 Cayenne S / GTS - 2010 to 2017
Porsche 970.1 Panamera 4 / 4S / GTS - 2009 to 2013
Porsche 970.2 Panamera GTS - 2014 to 2016

Diagram ref no 15

The Porsche Genuine OE Coolant Return Hose (Part No. 94810605124) is an original equipment engine cooling system hose assembly designed and manufactured to Porsche’s exact factory specifications. It’s a dedicated coolant return line (also referred to as a water return hose or coolant pipe) used in the closed-loop cooling system of specific Porsche V8 petrol engines.

This part has superseded the former numbers 94810605121, 94810605122, and 94810605123.

Coolant hoses endure thermal cycling, pressure variations, and exposure to antifreeze, which can lead to material degradation, swelling, cracks, and leaks over time. A failing coolant return hose can result in coolant loss, overheating, and potential engine damage. Replacing worn or deteriorated hoses with Genuine Porsche OE parts ensures correct dimensions, material resilience, and leak-free performance that aligns with factory cooling system specifications

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

94810605124

The product you are viewing cross references to these numbers

Water coolant hose - return
OE Match replacement coolant line designed to replicate the original Porsche hose in shape, length, material, and fitment. It serves as a return path for coolant within the engine cooling system, helping maintain proper circulation and temperature regulation.

Fits:
Porsche 958 Cayenne S / GTS - 2010 to 2017
Porsche 970.1 Panamera 4 / 4S / GTS - 2009 to 2013
Porsche 970.2 Panamera GTS - 2014 to 2016

Diagram ref no 15

The return hose carries coolant back toward the radiator or engine block after it has passed through the engine and other cooling components. Proper coolant flow is vital for maintaining stable engine temperatures, preventing overheating, and ensuring long-term engine longevity. A worn, cracked, or leaking hose can compromise coolant flow, lead to coolant loss, introduce air into the system, and result in overheating or engine damage.

This OE Match hose fits directly in place of the original and is supplied without additional clamps or fittings, allowing reuse of existing hardware or replacement with recommended clamps as needed. It’s ideal for coolant system maintenance, restoration work, or replacing age-affected components.

The coolant return hose completes the coolant circulation loop by transporting coolant back to the radiator/engine assembly after passage through the engine or heat exchangers. This return path helps maintain stable coolant temperatures and supports continuous heat dissipation.

Function:
• Provides a return path for coolant in the engine cooling system
•  Maintains proper coolant circulation and temperature control
•  Resists heat, pressure, and coolant breakdown
•  Design for direct fit and correct routing
•  Durable construction for long-term service

Coolant hoses deteriorate over time due to heat cycling, pressure, and exposure to coolant and engine bay contaminants. Cracks, bulges, or soft spots can develop, leading to coolant leaks, engine overheating, air ingress, and reduced cooling performance. Replacing aging hoses with an OE Match coolant return hose restores proper fluid flow, maintains engine operating temperature, and helps protect against costly engine damage.

When to replace:
•  Visible cracks, swelling, or soft spots
•  Coolant leaks or crusty coolant residue
•  Engine overheating or temperature fluctuations
•  During major coolant service (water pump, thermostat, belt service)
•  Routine preventative maintenance for older hoses

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

94810605124

The product you are viewing cross references to these numbers

Water coolant hose - return



Fits:
Porsche 970.1 Panamera 3.6ltr- 2009 to 2013
Porsche 970.1 Panamera 4 3.6ltr - 2009 to 2013
Porsche 970.2 Panamera 3.6ltr - 2014 to 2016
Porsche 970.2 Panamera 4 3.6ltr - 2014 to 2016

Click 'Zoom in' for large parts diagram.
Diagram ref no 15

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

94610605122

The product you are viewing cross references to these numbers

Water coolant hose - return



Fits:
Porsche 970.1 Panamera 3.6ltr- 2009 to 2013
Porsche 970.1 Panamera 4 3.6ltr - 2009 to 2013
Porsche 970.2 Panamera 3.6ltr - 2014 to 2016
Porsche 970.2 Panamera 4 3.6ltr - 2014 to 2016

Click 'Zoom in' for large parts diagram.
Diagram ref no 15

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

94610605122

The product you are viewing cross references to these numbers

Water coolant hose, return.



Fits:
Porsche 970 Panamera S / GTS / Turbo 4.8L 2010-16

Click 'Zoom in' for large parts diagram.
Diagram ref no 34

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

97010640102

The product you are viewing cross references to these numbers