Pipes

Coolant pipe, feed.
Gear oil cooler.

Fits:
Porsche 987.1 Boxster 2005-08 Tiptronic transmission
Porsche 987C.1 Cayman 2005-08 Tiptronic transmission

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Diagram ref no 11

Related reference numbers
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98710667400

The product you are viewing cross references to these numbers

Dual clutch transmission coolant hose.

Fits:
Porsche 987.2 Boxster 2009-12 PDK transmission
Porsche 987C.2 Cayman 2009-12 PDK transmission

Click 'Zoom in' for large parts diagram.
Diagram ref no 10

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9G230707600

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O-Ring  for PDK Gearbox Oil Cooler Pipe - 12.25 x 2.5mm 
Sold each – 4 required per car

Prevent transmission oil leaks with this OE Match replacement O-ring, designed to seal the gearbox oil cooler pipe connections on Porsche Boxster and Cayman models equipped with PDK transmission.

Fits:

• Porsche Boxster 987 MKII 2.9L 2009-12
• Porsche Boxster S 987 MKII 3.4L 2009-12
• Porsche Boxster 981 2.7L 2012-16
• Porsche Boxster 981 S / GTS 3.4L 2012-16
• Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
• Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
• Porsche Boxster T 718 2.0L PDK (300 Bhp) 01/2019>>
• Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>>
• Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>>
• Porsche Boxster Spyder / Spyder RS 718 4.0L 01/2019>>
• Porsche Boxster 25 Years 718 4.0L PDK (400 Bhp) 01/2020>>
• Porsche Cayman 2.9L 987C MKII 2009-12
• Porsche Cayman S / R 3.4L 987C MKII 2009-12
• 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 PDK (300 Bhp)
• Porsche Cayman S 718 2.5L PDK (350 Bhp)
• Porsche Cayman T 718 2.0L PDK (300 Bhp)
• Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
• Porsche Cayman GTS 718 4.0L PDK (400 Bhp)
• Porsche Cayman GT4 718 4.0L / GT4 RS 718 4.0L

Diagram ref no 30

This precision-sized sealing ring fits between the oil cooler pipe and its connection point, creating an oil-tight joint that prevents fluid escaping under normal operating conditions.

An essential replacement when servicing gearbox cooling pipes, particularly where original seals have become flattened, hardened or damaged.

What Does It Do?

The O-ring forms a pressure-resistant seal between the gearbox oil cooler pipe and its mating connection.

As transmission oil circulates through the PDK cooling system, the O-ring prevents oil escaping around the pipe fitting.

When installed correctly, the seal compresses between the mating surfaces to maintain a secure, leak-free connection.

Why Is It Important?

The PDK transmission depends on maintaining the correct oil level for lubrication, hydraulic operation and temperature management.

A worn or damaged O-ring may cause:

• Transmission oil seepage around cooler pipe connections
• Oil stains on the gearbox casing
• Gradual loss of gearbox oil
• Reduced sealing effectiveness at the pipe joint
• Potential transmission damage if oil loss is ignored

Replacing deteriorated seals helps maintain the integrity of the gearbox cooling circuit.

Why Do PDK Oil Cooler O-Rings Fail?

Continuous exposure to transmission oil, operating temperatures and pressure changes can gradually affect the condition of the sealing material.

Common causes include:

• Hardening or flattening with age
• Compression set from prolonged installation
• Damage during oil pipe removal
• Incorrect fitting or pinched seals
• Deterioration caused by repeated temperature changes

When Should It Be Replaced?

Replacement is recommended whenever the O-ring shows cracking, distortion, flattening or evidence of oil leakage.

New seals should also be fitted when disconnecting the relevant gearbox oil cooler pipes, as previously compressed O-rings may no longer provide a reliable seal.

Installation Notes

Remove the old O-ring and carefully clean the sealing groove and mating surfaces.

Lightly lubricate the replacement seal with the appropriate transmission oil before installation, ensuring it sits correctly without twisting or stretching.

Reconnect the oil pipe securely and inspect for leaks after completing the repair. Follow Porsche's specified procedure if the transmission oil level requires checking or adjustment.

Key Features

• OE Match aftermarket replacement O-ring
• Dimensions: 12.25 x 2.5mm
• Designed for PDK gearbox oil cooler pipe connections
• Creates an oil-tight seal between mating components
• Helps prevent transmission oil leakage
• Suitable for Porsche 987.2, 981 and 718 Boxster/Cayman models
• Ideal for gearbox oil cooler pipe servicing
• Sold individually – 4 required per applicable vehicle assembly

OE Match Porsche Boxster & Cayman PDK Gearbox Oil Cooler O-Rings

The Porsche 987.2, 981 and 718 Boxster and Cayman PDK gearbox cooling systems use sealing rings at oil pipe connections to prevent transmission fluid leakage and maintain reliable oil circulation.

The OE Match O-ring, measures 12.25 x 2.5mm and provides a replacement seal for the relevant gearbox oil cooler pipe fittings. It is particularly useful when renewing transmission cooling pipes, repairing oil leaks or carrying out gearbox heat exchanger maintenance.

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9P1301185A

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O-ring PDK gearbox oil cooler pipe 12,25 x 2,5

Sold each - 4 required per car

Fits:
Porsche Boxster 987 MKII 2.9L 2009-12
Porsche Boxster S 987 MKII 3.4L 2009-12
Porsche Boxster 981 2.7L 2012-16
Porsche Boxster 981 S / GTS 3.4L 2012-16
Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
Porsche Boxster T 718 2.0L PDK (300 Bhp) 01/2019>>
Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>>
Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>>
Porsche Boxster Spyder / Spyder RS 718 4.0L 01/2019>>
Porsche Boxster 25 Years 718 4.0L PDK (400 Bhp) 01/2020>>
Porsche Cayman 2.9L 987C MKII 2009-12
Porsche Cayman S / R 3.4L 987C MKII 2009-12
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 PDK (300 Bhp)
Porsche Cayman S 718 2.5L PDK (350 Bhp)
Porsche Cayman T 718 2.0L PDK (300 Bhp)
Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
Porsche Cayman GTS 718 4.0L PDK (400 Bhp)
Porsche Cayman GT4 718 4.0L / GT4 RS 718 4.0L

Diagram ref no 30

Related reference numbers
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9P1301185A

The product you are viewing cross references to these numbers

PDK Gearbox Coolant Hose.

Fits:
Porsche 987 Boxster MKII 2009>>2012
Porsche 987 Cayman MKII 2009>>2012

Diagram Ref No 13

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9G230707500

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Retaining bracket plate PDK gearbox oil cooler. 

Fits:

Porsche Boxster 987 MKII 2.9L 2009-12
Porsche Boxster S 987 MKII 3.4L 2009-12
Porsche Boxster 981 2.7L 2012-16
Porsche Boxster 981 S / GTS 3.4L 2012-16
Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
Porsche Boxster T 718 2.0L PDK (300 Bhp) 01/2019>>
Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>>
Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>>
Porsche Boxster Spyder / Spyder RS 718 4.0L 01/2019>>
Porsche Boxster 25 Years 718 4.0L PDK (400 Bhp) 01/2020>>
Porsche Cayman 2.9L 987C MKII 2009-12
Porsche Cayman S / R 3.4L 987C MKII 2009-12
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 PDK (300 Bhp)
Porsche Cayman S 718 2.5L PDK (350 Bhp)
Porsche Cayman T 718 2.0L PDK (300 Bhp)
Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
Porsche Cayman GTS 718 4.0L PDK (400 Bhp)
Porsche Cayman GT4 718 4.0L / GT4 RS 718 4.0L

Diagram ref no 31

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9G230725500

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PDK Gearbox Oil Cooler Pipe Retaining Plate

Ensure the gearbox oil cooler pipes remain securely fastened with this OE Match replacement retaining bracket plate for Porsche Boxster and Cayman PDK models.

Fits:

• Porsche Boxster 987 MKII 2.9L 2009-12
• Porsche Boxster S 987 MKII 3.4L 2009-12
• Porsche Boxster 981 2.7L 2012-16
• Porsche Boxster 981 S / GTS 3.4L 2012-16
• Porsche Boxster 718 2.0L PDK (300 Bhp) 2017>>
• Porsche Boxster S 718 2.5L PDK (350 Bhp) 05/2017>>
• Porsche Boxster T 718 2.0L PDK (300 Bhp) 01/2019>>
• Porsche Boxster GTS 718 2.5L PDK (365 Bhp) 05/2017>>
• Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>>
• Porsche Boxster Spyder / Spyder RS 718 4.0L 01/2019>>
• Porsche Boxster 25 Years 718 4.0L PDK (400 Bhp) 01/2020>>
• Porsche Cayman 2.9L 987C MKII 2009-12
• Porsche Cayman S / R 3.4L 987C MKII 2009-12
• 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 PDK (300 Bhp)
• Porsche Cayman S 718 2.5L PDK (350 Bhp)
• Porsche Cayman T 718 2.0L PDK (300 Bhp)
• Porsche Cayman GTS 718 2.5L PDK (365 Bhp)
• Porsche Cayman GTS 718 4.0L PDK (400 Bhp)
• Porsche Cayman GT4 718 4.0L / GT4 RS 718 4.0L

Diagram ref no 31

This compact mounting component is used within the transmission cooling assembly to hold the oil cooler pipe connections in place. It helps maintain a stable fit between the connected components, reducing movement that could place unnecessary strain on the pipe fittings.

Ideal for replacing a missing, damaged or incorrectly seated original bracket during PDK gearbox repairs.

What Does It Do?

The retaining bracket plate provides mechanical retention for the PDK gearbox oil cooler pipe connections.

As the vehicle operates, engine and gearbox movement can create vibration around the transmission cooling components.

The bracket keeps the oil pipe fittings securely located, helping prevent movement or displacement at their mounting points.

Why Is It Important?

Although it does not carry or seal transmission oil itself, the retaining bracket plays an important supporting role in the gearbox cooling assembly.

A correctly installed bracket helps:

• Hold oil cooler pipe connections in position
• Maintain correct alignment between connected components
• Reduce movement caused by vibration
• Minimise unnecessary strain on pipe fittings and seals
• Support secure assembly of the gearbox cooling system

A damaged or missing bracket may allow excessive movement, potentially affecting the security of the pipe connections.

Why Do Retaining Bracket Plates Fail?

These components are generally long-lasting, but damage can occur through mechanical stress or incorrect handling.

Common causes include:

• Bending during oil cooler pipe removal
• Damage from incorrect installation
• Corrosion caused by moisture and road salt
• Worn or damaged securing points
• Accidental damage during gearbox maintenance

When Should It Be Replaced?

Replace the retaining bracket if it is bent, cracked, excessively corroded or no longer holds the oil cooler pipes securely.

It should also be checked whenever the transmission oil cooler pipes, heat exchanger or associated seals are removed for maintenance.

Installation Notes

Inspect the mounting area and confirm that the oil cooler pipe connections are fully seated before fitting the bracket.

Position the retaining plate correctly and secure it using the appropriate original fixing arrangement.

Check the surrounding pipe connections and sealing rings for damage. If the oil cooling circuit has been opened, follow the correct PDK servicing procedure and check for leaks after reassembly.

Why Choose OE Match?

OE Match provides replacement components for Porsche owners seeking an alternative to genuine Porsche parts.

This retaining bracket is intended to replace the corresponding original component while maintaining the factory-style mounting arrangement.

Key Features

• OE Match aftermarket replacement retaining plate
• Designed for PDK gearbox oil cooler pipe connections
• Helps keep transmission cooling pipes securely located
• Supports correct alignment of pipe fittings
• Reduces unwanted vibration-related movement
• Suitable for Porsche 987.2, 981 and 718 Boxster/Cayman PDK models
• Useful for gearbox cooling system repairs and maintenance
• Alternative to a genuine Porsche replacement part

OE Match Porsche Boxster & Cayman PDK Oil Cooler Pipe Retaining Brackets

The Porsche 987.2, 981 and 718 Boxster and Cayman PDK gearbox cooling assemblies use retaining brackets to secure the transmission oil cooler pipe connections and maintain their correct positioning.

The OE Match retaining bracket plate, is a replacement mounting component for applicable Porsche PDK gearbox oil cooling systems. It is particularly useful when repairing transmission oil cooler pipe connections or replacing damaged retaining hardware.

Related reference numbers
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9G230725500

The product you are viewing cross references to these numbers

Return line gearbox cooler.

Fits:
For tiptronic transmission cars
Porsche 986 Boxster 1997-04
Porsche 987.1 Boxster 2006-08
Porsche 987C.1 Cayman 2006-08

Click 'Zoom in' for large parts diagram.
Diagram ref no 17

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98630708505

The product you are viewing cross references to these numbers

Supply line gearbox oil cooler

Fits:
For tiptronic transmission cars
Porsche 986 Boxster 1997-04
Porsche 987.1 Boxster 2006-08
Porsche 987C.1 Cayman 2006-08

Click 'Zoom in' for large parts diagram.
Diagram ref no 18

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98630708205

The product you are viewing cross references to these numbers

Water coolant hose PDK gearbox. 

Fits:
Porsche 981 Boxster / Boxster S - 2012 to 2016
Porsche 981 Cayman / Cayman S - 2013 to 2016

Click 'Zoom in' for large parts diagram.
Diagram ref no 8

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9G230707601

The product you are viewing cross references to these numbers

Water Hose, 18 X 3,5 X 50.
The Genuine Porsche Water Hose 90018106250 is a short coolant connector hose used within the water-cooling circuit associated with the Tiptronic automatic-transmission heat exchanger on selected Porsche Boxster and Cayman models.
Sold Each.
x2 Required Per Car.

Fits:

• Porsche Boxster 986 2.5L 1997-99
• Porsche Boxster 986 2.7L 1999-02
• Porsche Boxster S 986 3.2L 1999-02
• Porsche Boxster 986 2.7L 2003-04
• Porsche Boxster S 986 3.2L 2003-04
• Porsche Boxster 987 2.7L 2005-08/08
• Porsche Boxster 987 S 3.2/3.4L 2005-08/08
• Porsche Cayman 2.7L 987C 2006-08
• Porsche Cayman S 3.4L 987C 2005-08  

Cars With Option Codes:
249 - Tiptronic Transmission

Diagram Ref No 11

Although positioned within the transmission-cooling system, this hose carries engine coolant rather than automatic transmission fluid.

Coolant circulating through the ATF heat exchanger transfers heat between the engine cooling system and the automatic transmission fluid, helping the transmission reach and maintain an appropriate operating temperature.

Because the hose operates as part of the pressurised engine cooling system, it must remain flexible, securely clamped and completely leak-free.

Age, heat, coolant exposure and repeated pressure cycles can eventually cause the rubber to harden, swell, crack or lose its ability to seal correctly.

Replacing a deteriorated hose helps restore coolant-system integrity and reduces the risk of coolant loss, transmission heat-exchanger problems and engine overheating.

What This Product Does:
This hose provides a short flexible coolant connection within the Tiptronic transmission oil-cooling circuit.

Its functions include:

• Carrying engine coolant through the transmission heat-exchanger circuit.
• Maintaining coolant circulation around the ATF cooler.
• Helping regulate automatic-transmission fluid temperature.
• Maintaining a sealed and pressurised cooling circuit.
• Providing flexibility between adjoining rigid coolant components.
• Accommodating vibration and thermal movement.
• Preventing coolant loss at the connection.

Symptoms Of Wear Or Failure:
Common symptoms include:

• Visible coolant leakage.
• Coolant residue around the hose.
• Damp hose connections.
• Gradual loss of coolant.
• Low-coolant warning.
• Sweet coolant smell.
• Drips beneath the vehicle.
• Cracked rubber.
• Hardened hose material.
• Soft or swollen rubber.
• Bulging.
• Leakage around the hose clamps.
• Engine temperature rising above normal.
• Steam following a major coolant leak.

Why Replacement Matters:
Replacing a worn or leaking water hose helps restore:

• Cooling-system sealing.
• Correct coolant circulation.
• Proper system pressure.
• Reliable ATF heat-exchanger cooling.
• Stable engine operating temperature.
• Reduced risk of coolant loss.
• Long-term cooling-system reliability.

A small coolant hose is inexpensive compared with the potential consequences of major coolant loss or overheating.

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90018106250

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