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O-ring for gearbox oil cooler ATF. Porsche 996 / 986 / 987 / 987C / 997.1 ❭ 99970738840
- 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 996 C2 3.4L 1997-08/01
- Porsche 996 C4 3.4L 1997-08/01
- Porsche 996 C2 3.6L 09/01-2005
- Porsche 996 C4 3.6L 09/01-2005
- Porsche 996 C4S 3.6L 09/01-2005
- Porsche 996 TURBO 2000-05
- Porsche 997 MK1 Carrera 2 3.6L 2005-08
- Porsche 997 MK1 Carrera 2S 3.8L 2005-08
- Porsche 997 MK1 Carrera 4 3.6L 2005-08
- Porsche 997 MK1 Carrera 4S 3.8L 2005-08
- Porsche Cayman 2.7L 987C 2006-08
- Porsche Cayman S 3.4L 987C 2005-08
This Porsche Genuine OE O-Ring for Gearbox Oil Cooler ATF is a precision-engineered sealing ring used within the automatic (Tiptronic) transmission cooling system. This small but critical component provides a fluid-tight seal between the gearbox oil cooler and connecting pipework.
Sold individually
Fits:
Porsche 986 Boxster 1997 - 2004 Tiptronic
Porsche 987.1 Boxster 2005 - 2007 Tiptronic
Porsche 987C.1 Cayman 2007 - 2008 Tiptronic
Porsche 996 C2 / C4 / Turbo 1998 - 2005 Tiptronic
Porsche 997.1 C2 / C4 2005 - 2008 Tiptronic
Diagram ref no 2
Manufactured to Porsche OE standards, it ensures correct dimensions, material quality, and resistance to ATF (automatic transmission fluid), heat, and pressure.
This O-ring seals the junction between the gearbox oil cooler (heat exchanger) and its associated pipes, preventing ATF leaks and maintaining correct system pressure. By ensuring a secure seal, it allows the transmission fluid to circulate properly through the cooler, helping regulate temperature and maintain optimal gearbox performance.
Functions & Technical Role
• Fluid sealing: Prevents ATF leaks at oil cooler connections
• Pressure retention: Maintains correct hydraulic pressure within the system
• Thermal resistance: Designed to withstand high transmission temperatures
• System protection: Prevents contamination and air ingress
• OEM precision fit: Exact size and material specification for Porsche applications
Fitment / Position on car
• Fitting position: Transmission cooling system
• Location: Between gearbox oil cooler (ATF heat exchanger) and fluid pipes
• System: Automatic transmission (Tiptronic) lubrication and cooling
Although small, O-rings are critical wear items exposed to heat cycles, pressure, and fluid degradation. Over time they can harden, shrink, or crack, leading to:
• ATF leaks around the gearbox oil cooler
• Loss of transmission fluid and pressure
• Overheating of the gearbox
• Potential transmission damage
Replacing with a genuine Porsche OE O-ring ensures proper sealing, reliability, and long-term protection of the transmission system.
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
99970738840
The product you are viewing cross references to these numbers
- Porsche 992.1 Carrera 2 3.0L 2019-24
- Porsche 992.1 Carrera 4 3.0L 2019-24
- Porsche 992.1 Carrera 4 Cabriolet 3.0L 2019-24
- Porsche 992.1 Carrera 4S / GTS 3.0L 2019-24
- Porsche 992.1 Carrera 4S / GTS Cabriolet 3.0L 2019-24
- Porsche 992.1 Targa 4 3.0L 2020-24
- Porsche 992.1 Targa 4S / GTS 3.0L 2020-24
- Porsche 992.1 Turbo 3.8L 2020-24
- Porsche 992.1 Turbo S 3.8L 2020-24
- Porsche 992.1 Turbo Cabriolet 3.8L 2020-24
- Porsche 992.1 Turbo S Cabriolet 3.8L 2020-24

Fits:
Porsche 992.1 C4 / C4S 2019>>
Porsche 992 Turbo 2020>>
Click 'Zoom in' for large parts diagram.
Diagram ref no 13
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PAB409083
The product you are viewing cross references to these numbers
- Porsche 992.1 Carrera 2 3.0L 2019-24
- Porsche 992.1 Carrera 4 3.0L 2019-24
- Porsche 992.1 Carrera 2 Cabriolet 3.0L 2019-24
- Porsche 992.1 Carrera 4 Cabriolet 3.0L 2019-24
- Porsche 992.1 Carrera 2S / GTS 3.0L 2019-24
- Porsche 992.1 Carrera 4S / GTS 3.0L 2019-24
- Porsche 992.1 Carrera 2S / GTS Cabriolet 3.0L 2019-24
- Porsche 992.1 Carrera 4S / GTS Cabriolet 3.0L 2019-24
- Porsche 992.1 Targa 4 3.0L 2020-24
- Porsche 992.1 Targa 4S / GTS 3.0L 2020-24
- Porsche 992.1 Speedster 4.0L 2019-24
- Porsche 992.1 Turbo 3.8L 2020-24
- Porsche 992.1 Turbo S 3.8L 2020-24
- Porsche 992.1 Turbo Cabriolet 3.8L 2020-24
- Porsche 992.1 Turbo S Cabriolet 3.8L 2020-24
- Porsche 992.1 GT3 4.0L / 992 S/T 4.0L 2021-24
- Porsche 992.1 GT3 RS 4.0L 2022-24
- Porsche 992.1 (911) Sport Classic 3.8L 2023
- Porsche 992.1 (911) Dakar 3.0L 2023-24

Fits:
Porsche 992 - 2019 Onwards (Manual gearbox)
Porsche 992 turbo - 2019 Onwards (Manual gearbox)
Porsche 992 GT3 - 2019 Onwards (Manual or PDK gearbox)
Fits between the gearbox oil cooler and oil pump
Click 'Zoom in' for large parts diagram.
Diagram ref no 4
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9P1301131
The product you are viewing cross references to these numbers
- Porsche 992.1 Carrera 2 3.0L 2019-24
- Porsche 992.1 Carrera 4 3.0L 2019-24
- Porsche 992.1 Carrera 2 Cabriolet 3.0L 2019-24
- Porsche 992.1 Carrera 4 Cabriolet 3.0L 2019-24
- Porsche 992.1 Carrera 2S / GTS 3.0L 2019-24
- Porsche 992.1 Carrera 4S / GTS 3.0L 2019-24
- Porsche 992.1 Carrera 2S / GTS Cabriolet 3.0L 2019-24
- Porsche 992.1 Carrera 4S / GTS Cabriolet 3.0L 2019-24
- Porsche 992.1 Turbo 3.8L 2020-24
- Porsche 992.1 Turbo S 3.8L 2020-24
- Porsche 992.1 Turbo Cabriolet 3.8L 2020-24
- Porsche 992.1 Turbo S Cabriolet 3.8L 2020-24
- Porsche 992.1 GT3 4.0L / 992 S/T 4.0L 2021-24
- Porsche 992.1 GT3 RS 4.0L 2022-24
- Porsche 992.1 (911) Sport Classic 3.8L 2023
For Manual Cars ONLY!
Fits:
Porsche 992.1 Carrera MKI 2019>>2024
Porsche 992.1 Turbo / S MKI 2020>>
Cars With Option Codes:
E8R - Special Model "911 Sport Classic"
Porsche 992.1 GT3 / RS / ST MKI 2021>>
Diagram Ref No 1
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9P1300333
The product you are viewing cross references to these numbers
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