Genuine BMW PCV Repair Kit Valve Cover Membrane Diaphragm 11121025447 – B58 Engine

Restore proper crankcase ventilation without replacing the complete valve cover with this Genuine BMW PCV repair kit, part number 11121025447.

This kit contains the original BMW diaphragm, spring and cover components used to repair the integrated PCV system fitted to B58 engines. A failed diaphragm can cause excessive crankcase vacuum, whistling noises, rough idle and oil consumption issues.

Replacing the diaphragm is a cost-effective alternative to replacing the complete valve cover assembly when the remainder of the cover is still serviceable.

Product Information

Repair Kit Part Number

• 11121025447

Application

• Valve cover PCV membrane repair

Brand

• Genuine BMW

Condition

• Brand New

Engine Compatibility

• B58 3.0L Turbo Petrol

Common Symptoms of PCV Diaphragm Failure

• Whistling or squealing noise from the valve cover

• Rough idle

• Excessive crankcase vacuum

• Oil consumption

• Check engine light

• Lean mixture fault codes

• Difficulty removing oil filler cap while engine is running

Package Contents

• Genuine BMW PCV diaphragm

• Spring

• Retainer components

Compatible Vehicles

Suitable for BMW models equipped with the B58 engine, including:

BMW 1 Series

• F20 LCI

• F21 LCI

BMW 2 Series

• F22 / F22 LCI

• F23 / F23 LCI

BMW 3 Series

• F30 LCI

• F31 LCI

• F34 GT LCI

BMW 4 Series

• F32

• F33

• F36 Gran Coupe

BMW 5 Series

• G30

• G31 Touring

BMW 6 Series

• G32 GT

BMW 7 Series

• G11

• G12

BMW SUV Models

• X3 G01

• X4 G02

Why Replace the Diaphragm?

The B58 engine uses an integrated PCV system built into the valve cover. Over time the membrane can split or lose tension, causing drivability and vacuum-related issues.

Replacing the diaphragm often restores correct operation without the expense of a complete valve cover replacement.

Important Fitment Information

BMW made changes throughout production and not every B58 valve cover uses the same repair components.

Please send the last 7 digits of your VIN before purchase and we can confirm compatibility.

Why Buy From Us?

✔ BMW & MINI Parts Specialists

✔ Genuine BMW Parts Stocked In Australia

✔ Real Photos Of The Actual Product

✔ VIN Compatibility Support Available

✔ Fast Dispatch

✔ Technical Knowledge And After Sales Support

✔ Assistance Diagnosing Common BMW PCV Problems

We understand common B58 crankcase ventilation failures and can help ensure you receive the correct repair components the first time.

Fitment Disclaimer

Compatibility information is provided as a guide only. BMW production changes may occur within the same model range. VIN confirmation is recommended before purchase.