11127645173 PCV Valve Cover Repair Kit for BMW B58
This PCV valve cover repair kit is designed for BMW B58 engines using OEM reference 11127645173. It repairs the crankcase ventilation diaphragm area built into the valve cover and helps restore correct PCV pressure regulation.
The kit is intended for targeted repair of the existing valve cover ventilation system. It is not a complete valve cover assembly or full crankcase ventilation unit.
OEM / Reference Numbers
Primary OEM number:
- 11127645173
Secondary OEM / reference numbers:
- 11121025447
- 11 12 7 645 173
Product reference:
- SKU: KL111276451731
Part Type
- PCV valve cover repair kit
- crankcase ventilation valve repair kit
- valve cover diaphragm repair kit
- PCV membrane repair kit
- engine breather repair component
What This Part Does
The PCV diaphragm regulates crankcase pressure and controls blow-by gas flow through the valve cover ventilation system. When the diaphragm fails, the engine can develop unstable crankcase pressure, vacuum leak symptoms and oil vapor issues.
Replacing the failed diaphragm helps restore PCV pressure control while keeping the existing BMW B58 valve cover in service.
Compatible Vehicles
This PCV valve cover repair kit is listed for BMW B58 engine applications.
- BMW M140i
- BMW M240i
- BMW 340i
- BMW 440i
- BMW 540i
- BMW 640i
- BMW 740i
- BMW X3 M40i
- BMW X4 M40i
- Compatible F-series and G-series BMW B58 applications
Engine / Engine Family
- BMW B58
- BMW turbocharged petrol engine application
Common Symptoms of Failure
- rough or unstable idle
- whistling or suction noise from the valve cover area
- vacuum leak symptoms
- increased oil consumption
- incorrect crankcase pressure
- oil vapor issues in the intake system
- check engine light related to air or pressure control faults
Why Choose This Replacement
- Targets the exact repair intent for 11127645173
- Supports related reference 11121025447
- Repairs the failed diaphragm inside the existing BMW B58 valve cover
- Cost-effective alternative to replacing the complete valve cover when only the PCV diaphragm has failed
- Helps restore crankcase ventilation and pressure regulation
Important Before Ordering
- Check that your original valve cover or PCV system matches 11127645173 or a listed related reference.
- Confirm that your vehicle uses a BMW B58 engine.
- Compare the repair kit design with the PCV diaphragm area of your original valve cover.
- This product is a PCV valve cover repair kit, not a complete valve cover assembly.
- Verify compatibility by OEM number, engine type and part design before ordering.
FAQ
What does BMW 11127645173 fit?
BMW 11127645173 is listed for PCV valve cover repair on BMW B58 engine applications, including selected BMW M140i, M240i, 340i, 440i, 540i, 640i, 740i, X3 M40i and X4 M40i applications.
Is 11121025447 related to 11127645173?
Yes. 11121025447 is listed as a related reference for this BMW B58 PCV repair application. The main repair focus remains OEM 11127645173.
What does this BMW B58 PCV repair kit do?
It repairs the crankcase ventilation diaphragm area in the valve cover and helps restore correct PCV pressure regulation.
What symptoms indicate PCV diaphragm failure on BMW B58 engines?
Common symptoms include rough idle, whistling noise, vacuum leak symptoms, increased oil consumption, incorrect crankcase pressure and oil vapor issues.
Is this a complete valve cover assembly?
No. This product is a PCV valve cover repair kit for the diaphragm area. It is not a complete valve cover assembly.
How do I confirm compatibility before ordering?
Confirm OEM number 11127645173 or a listed related reference, check that your vehicle uses a BMW B58 engine, and compare the repair kit design with your original valve cover PCV area.
Read All
Orders ship within 1–2 business days.
Standard delivery:
- USA: Some items ship from our US warehouse and arrive within 3 business days.
- USA-EU: 10–21 business days
- Worldwide: 14–30 business days
Shipping cost is shown at checkout.
Can I exchange or return an item?
Yes, you can exchange or return an item within 14 days of purchase. This right is guaranteed to you by the Law on the Protection of Consumer Rights
To use this feature, please make sure that:
- the product was not in use and has no traces of use: scratches, chips, abrasions, etc.
- the goods are fully completed and the integrity of the packaging is not violated
- retained all labels and factory markings