11 15 7 533 346 : Crankcase breather return hose for BMW Series 3 E90 E91 320i N46

This crankcase breather return hose ensures the connection between the oil separator and the engine sump on the BMW Series 3 E90 and E91 fitted with the 320i N46 engine. Over time, this hose can crack, become rigid or lose its seal, causing oil leaks and faulty engine crankcase ventilation. Replacing it with a new part restores full functionality to the crankcase ventilation circuit, an essential condition for an engine in good working order. Special attention paid to this discreet component contributes to the reliability and longevity of a properly maintained BMW classic car.