AOS Oil / Air Separator. Porsche 987/981 Boxster / 987/981 Cayman / 982 GTS 4.0L

Oil / Air Separator.
The Genuine Porsche Air-Oil Separator is the factory-specified unit responsible for separating oil mist from crankcase blow-by gases on modern Porsche flat-6 engines. As part of the PCV system, it ensures clean ventilation, stable crankcase pressure, and proper oil control - critical for protecting the intake system and maintaining optimal engine performance.

Fits:
Porsche 987.2 Boxster 2009 - 2012
Porsche 981 Boxster 2012 - 2016
Porsche 981 Boxster Spyder 2016>>
Porsche 982 Boxster GTS 4.0L 2017>>
Porsche 987C.2 Cayman 2009 - 2012
Porsche 981C Cayman 2014 2016
Porsche 981C Cayman GT4 2016>>
Porsche 982C Cayman GT4 4.0L 2017>>

Diagram ref no 16

A factory-original air-oil separator designed to filter blow-by vapours, remove oil mist, and maintain stable crankcase ventilation.

Sold individually. It is recommended to also inspect and, if necessary, replace associated hoses and seals when fitting a new separator to ensure full system integrity.

This AOS:
•  Removes oil droplets and vapour from crankcase gases before they enter the intake
•  Maintains correct crankcase vacuum and pressure balance
•  Reduces oil consumption and prevents oil contamination in the intake tract
•  Helps prevent carbon build-up, fouled sensors, and smoky exhaust
•  Ensures emissions compliance and proper engine breathing




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Related, superseded, cross reference or alternative numbers for comparison.

0PB115099A

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