BMW B58 Gen1 PCV Valve Diaphragm Repair Kit

BMW B58 PCV valve diaphragms are a known weak point – the rubber membrane deteriorates over time from heat cycles and oil vapour, eventually tearing under crankcase pressure, often with no warning at all. That’s why we believe every B58 owner should keep one of these in the glovebox.

Common symptoms include: blue/white smoke from the exhaust, hissing or whistling noises from the engine bay, fumes when removing the oil cap, rough idle, and oil residue inside the charge pipes.

Our repair kit includes a direct replacement diaphragm, spring, and cap – restoring proper crankcase ventilation without replacing the entire valve cover.

FITS ALL B58 GEN1 MODELS:

BMW 1 Series: F20, F21 [2016-2019]
M140i (250kw / 340hp) – B58
M140iX (250kw / 340hp) – B58

BMW 2 Series: F22, F23 [2016-2021]
M240i (250kw / 340hp) – B58
M240iX (250kw / 340hp) – B58

BMW 3 Series: F30, F31, F34 GT [2015-2019]
340i (240kw / 326hp) – B58
340iX (240kw / 326hp) – B58
340i (265kw / 360hp) – B58 (+MPPSK)
340iX (265kw / 360hp) – B58 (+MPPSK)

BMW 4 Series: F32, F33, F36 [2016-2020]
440i (240kw / 326hp) – B58
440iX (240kw / 326hp) – B58
440i (265kw / 360hp) – B58 (+MPPSK)
440iX (265kw / 360hp) – B58 (+MPPSK)

BMW 5 Series: G30, G31 [2017-2020]
540i (250kw / 340hp) – B58
540iX (250kw / 340hp) – B58

BMW 6 Series: G32 GT [2017-2020]
640i (250kw / 340hp) – B58
640iX (250kw / 340hp) – B58

BMW 7 Series: G11, G12 [2016-2019]
740i (240kw / 326hp) – B58
740iX (240kw / 326hp) – B58
740Li (240kw / 326hp) – B58
740LiX (240kw / 326hp) – B58

BMW X3 G01 [2017-2019]
M40iX (260kw / 354hp) – B58
M40iX (265kw / 360hp) – B58

BMW X4 G02 [2018-2019]
M40iX (260kw / 354hp) – B58
M40iX (265kw / 360hp) – B58

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