B58 PCV Diaphragm Cap Replacement Kit

This B58 PCV Diaphragm replacement cap comes with all the necessary hardware to replace your old or leaking BMW PCV Diaphragm cap. The BMW B58 PCV cap is prone to failure with vehicle aging and mileage, as the rubber portion of the PCV cap will naturally dry and begin to crack over time. The PCV diaphragm cap is subjected to constant negative pressure, as a result, any cracks or leaks in the rubber seal will cause engine malfunctions. A replacement plastic end cap is also included in this kit, as it is not uncommon for this portion to be damaged upon removal. APPLICATIONS BMW 1 Series • 2015+ F20/F21 M140i BMW 2 Series • 2016+ F22 F23 M240i/iX BMW 3 Series • 2016-2019 F30 340i/340iX BMW 4 Series • 2016-2020 F32 F33 F36 440i/440iX BMW 5 Series • 2017-2019 G30 540i/540iX BMW 6 Series • 2017-2019 G32 640i/640iX BMW 7 Series 2016-2019 G11/G12 740i/740iX BMW X Series • 2016-2019 G01 X3 3.0i/M40i • 2017-2019 G02 X4 3.0i/M40i If your BMW has a B58 engine and you don't see your exact model on the list below please email us.