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- 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
Engine oil separator also known as a crankcase vent valve or AOS. It functions as part of the engine’s positive crankcase ventilation (PCV) system, managing and separating blow-by gases and oil vapour to help maintain engine performance and emissions compliance.
Fits:
Porsche Boxster 986 2003 - 2004
Porsche Boxster 987.1 2005 - 2008
Porsche Cayman 987C.1 2005 - 2008
Diagram Ref No 1.
The AOS is basically a small diaphragm distillery which distills the minute amounts of oil mist in the crankcase, liquifies it and sends it back to the crankcase. The "clean" air is now sent into the air intake (after the throttle body) to be burned off by the engine.
When the AOS starts to fail it cannot separate all of the oil out of the mist and some liquid oil is sent to the air intake.
A few drops of oil is enough to generate the GREAT SMOKE BOMB for which our cars are famous for.
A big smoke bomb once in a while is completely normal, due to the architecture of the flat-6 engine, which may let a drop of oil flow into one of the combustion chambers sporadically.
Related reference numbers
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99610702602
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- Porsche 971.1 Panamera Turbo V8 4.0L 4WD (550 Hp) 2017-20
- Porsche 971.1 Panamera Turbo V8 4.0L 4WD Executive 2017-20
- Porsche 971.1 Panamera Turbo 4.0L Twin-Turbo V8 Sport Turismo 2017-20
- Porsche 971.2 Panamera Turbo S 4.0L V8 2021-23
- Porsche 971.2 Panamera Turbo S Sport Turismo 4.0L V8 2021-23
This Oil Separator, Left is a OE MATCH Porsche 971.1 / 971.2 Panamera engine component designed to regulate crankcase ventilation by separating oil vapour from blow-by gases before they are recirculated into the intake system. Positioned on the left side of the engine, this unit ensures clean airflow while preventing excess oil from entering the combustion process.
Fits:
- Porsche 971.1 Panamera Turbo V8 4.0L 4WD (550 Hp) 2017-20
- Porsche 971.1 Panamera Turbo V8 4.0L 4WD Executive 2017-20
- Porsche 971.1 Panamera Turbo 4.0L Twin-Turbo V8 Sport Turismo 2017-20
- Porsche 971.2 Panamera Turbo S 4.0L V8 2021-23
- Porsche 971.2 Panamera Turbo S Sport Turismo 4.0L V8 2021-23
What This Product Does:
- Separates oil vapour from crankcase gases
- Prevents oil from entering the intake system
- Maintains proper crankcase ventilation
- Reduces oil consumption and emissions
- Supports efficient and stable engine performance
Symptoms Of Wear Or Failure:
- Excessive oil consumption
- Blue smoke from the exhaust (burning oil)
- Rough idle or engine misfires
- Whistling or suction noises from the engine
- Oil residue in intake components
- Check engine light related to crankcase ventilation faults
Why Replacement Matters:
- Prevents oil contamination of the intake system
- Restores proper engine ventilation and balance
- Reduces emissions and improves efficiency
- Protects engine components from oil buildup and damage
- Maintains smooth and reliable engine operation
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
PAB103495A
The product you are viewing cross references to these numbers
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- Porsche 971.1 Panamera Turbo V8 4.0L 4WD (550 Hp) 2017-20
- Porsche 971.1 Panamera Turbo V8 4.0L 4WD Executive 2017-20
- Porsche 971.1 Panamera Turbo 4.0L Twin-Turbo V8 Sport Turismo 2017-20
- Porsche 971.2 Panamera Turbo S 4.0L V8 2021-23
- Porsche 971.2 Panamera Turbo S Sport Turismo 4.0L V8 2021-23
This Oil Separator, Right is a OE MATCH Porsche 971.1 / 971.2 Panamera engine component designed to manage crankcase ventilation by separating oil vapour from blow-by gases before they are recirculated into the intake system. Mounted on the right-hand side of the engine, this unit helps ensure that only clean air is returned to the combustion process.
Fits:
- Porsche 971.1 Panamera Turbo V8 4.0L 4WD (550 Hp) 2017-20
- Porsche 971.1 Panamera Turbo V8 4.0L 4WD Executive 2017-20
- Porsche 971.1 Panamera Turbo 4.0L Twin-Turbo V8 Sport Turismo 2017-20
- Porsche 971.2 Panamera Turbo S 4.0L V8 2021-23
- Porsche 971.2 Panamera Turbo S Sport Turismo 4.0L V8 2021-23
Diagram Ref No 8
What This Product Does:
- Separates oil vapour from crankcase gases
- Prevents oil from entering the intake system
- Maintains proper crankcase ventilation (PCV function)
- Reduces oil consumption and emissions
- Supports smooth and efficient engine performance
Symptoms Of Wear Or Failure:
- Excessive oil consumption
- Blue smoke from the exhaust (oil burning)
- Rough idle or engine misfires
- Whistling or suction noises from the engine
- Oil residue in intake components
- Check engine light related to ventilation system faults
Why Replacement Matters:
- Prevents oil contamination of the intake system
- Restores proper crankcase ventilation
- Improves engine efficiency and reduces emissions
- Protects internal engine components from oil buildup
- Ensures smooth, reliable engine operation
Related reference numbers
Related, superseded, cross reference or alternative numbers for comparison.
9A710346402
The product you are viewing cross references to these numbers