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A question about the expensive Motorsport air-oil separators (for example see: Motorsport Air Oil Separator - 987:Suncoast Porsche Parts & Accessories) for a 987 Cayman. It is frequently recommended that the OEM AOS (part #99610702601) be replaced about every 4 years because its rubber membrane can tear leading to motor oil entering the engine intake manifolds. Does the Motorsport AOS also have a wear component or is it “permanent” and essentially never needs replacement? I have not been able to find an answer in the forums.
 
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