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AOS Oil / Air Separator. Porsche 987/981 Boxster / 987/981 Cayman / 982 GTS 4.0L ❭ 0PB115099A
- 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 981 Spyder 3.8L 2016
- Porsche Boxster GTS 718 4.0L Manual (400 Bhp) 01/2019>>
- Porsche Boxster GTS 718 4.0L PDK (400 Bhp) 01/2019>>
- Porsche Boxster Spyder / Sypder RS 718 4.0L 01/2019>>
- 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 GTS 718 4.0L Manual (400 Bhp)
- Porsche Cayman GTS 718 4.0L PDK (400 Bhp)
- Porsche Cayman GT4 718 4.0L / GT4 RS 718 4.0L
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Related, superseded, cross reference or alternative numbers for comparison.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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