This hose connects from the oil separator to the valve/rocker cover. An unfortunate and ongoing issue with modern BMWs is with the oil separator, or CVV system. Over time, the oil vapours the system that is designed to capture and recirculate can cause clogged lines and other blockages, resulting in oil leaks or reduced engine performance. We offer this replacement hose from Febi Bilstein - a trusted German brand.

OEM Part Number: 11611432559
Rein Part Number: ABV0125