11 15 7 567 801 : Crankcase breather return hose for BMW Series 3 E90 E91 N52

This crankcase breather return hose ensures the connection between the oil separator and the sump on BMW Series 3 E90 and E91 fitted with the N52 engine, variants 323i, 325i and 330i. Over time, this hose can crack or harden due to heat and engine cycles, causing oil leaks and disruption to the crankcase ventilation circuit. Its replacement is a common step in the restoration and careful maintenance of a BMW Series 3 classic. This new part restores the sealing and original operation of the crankcase ventilation system.