11 15 7 533 341 : Crankcase breather return hose for BMW Series 3 E90 E91 318i N46

This flexible hose ensures the return of oil vapours from the separator to the crankcase on the BMW Series 3 E90 and E91 with 318i N46 engine. As part of the restoration or maintenance of a classic vehicle, the crankcase breather and its associated ducts are often neglected elements but essential to the proper functioning of the engine ventilation circuit. A cracked or blocked hose can lead to oil leaks, excessive depression in the crankcase and premature engine wear. This replacement hose restores the sealing and proper functioning of the original crankcase breather circuit.