Crankcase Breather Connector Hose, Rein - E70 X5M, E71 X6M

This vent hose runs between the bank 1 and bank 2 oil vent pipes on the S63 engine in X5M and X6M. The crankcase vent system is responsible for separating oil from the air inside the engine and air intake. Liquid oil is returned to the oil pan while oil vapors are sent to the intake manifold to be burned up during the combustion cycle. It's also known as a a PCV, CCV, oil separator, and a cyclonic separator system. Too much oil in the intake air lowers the effective fuel octane, leads to drivability issues, and causes increased emissions. A completely blocked CCV has the potential for very serious engine failure (hydrolock) if liquid oil ends up in the intake. Signs of a failing CCV include: whistling noises in the intake, blueish smoke in the exhaust, high oil consumption, and thick white or yellow gunk under the oil cap.

This is a S63 oil connector hose manufactured by Rein (CRP) Automotive - an original supplier to BMW for many engine components. As an OEM, Rein meets all of BMW's original design, fitment, and performance requirements and is TUV approved. OEM parts are the best alternative to more expensive Original BMW parts because they are virtually identical without the inflated price tag. This part has a two year warranty.

BMW Fitments:

X5 Series
E70 X5 (07-13) > X5 M
X6 Series
E71 X6 (2008-2014) > X6 M