AOS Oil/Air Separator. Porsche Boxster 986 2003>> – Porsche Boxster/Cayman

Oil/air separator. The engine oil separator, also known as the crankcase ventilation valve (AOS), is part of the engine's positive crankcase ventilation (PCV) system and serves to control and separate blow-by gases and oil vapors to maintain engine performance and comply with emissions regulations. The oil separator (AOS) is essentially a small diaphragm distillation unit that distills, condenses, and returns the small amounts of oil mist in the crankcase back to the crankcase. Porsche part number: 99610702602. Manufacturer: OEM / original equipment quality.

• 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

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