This is a valve cover (PCV) repair kit for the BMW B58 Gen 1 engine, addressing the crankcase ventilation diaphragm that BMW does not sell separately from a complete valve cover assembly. Made to match the original component in material and dimensions, the kit lets the worn diaphragm be replaced on its own, restoring proper crankcase ventilation and curing symptoms like rough idle, oil consumption, and hard starting without the expense of a full valve cover.

Fitment: BMW 1, 2, 3, 4, 5 and 7 Series with the B58 Gen 1 engine, covering the F20, F22, F30, F32, G30 and G11 chassis.