11 15 7 542 633 : Oil breather hose for BMW Series 3 E90 E91

This oil breather hose ensures flexible connection between the cylinder head cover and the oil separator on the BMW Series 3 in saloon E90 and estate E91 body styles, 318i N46 engine. As part of the restoration or maintenance of a classic BMW Series 3, this duct plays an essential role in managing engine oil vapours: a worn or cracked part can lead to vacuum loss and excessive oil consumption. This new hose restores a sealed breather circuit that conforms to original specifications.