BMW N54 Replacement PCV Valve for 1M, 135i, 335i, 535i, 740i, X6, Z4 440i (F32) Audi RS4 B9 Quattro 3

Audi RS4 B9 Quattro 3

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750i — N63 / N63TU 4

Dyno Graph:

Q:  I don't have currently have an injector controller

BMW N54 Replacement PCV Valve for 1M, 135i, 335i, 535i, 740i, X6, Z4 440i (F32) Audi RS4 B9 Quattro 3The RB N54 PCV Valve is an upgraded replacement PCV valve for your N54 Engine and is strongly recommended for your high performance (or higher mileage) N54. The OEM plastic PCV valve does not hold pressure well even when brand new. What the leaky PCV valve means is that when you are in boosted conditions, the "highly" pressurized PCV valve leaks turbocharged pressures into the crankcase. Pending on the condition of your PCV valve it could leak worse