Aluminum PCV Diaphragm Cover for BMW N52, N52K, N53, N52N, N52T, N51
This aluminum PCV diaphragm cover is designed for BMW N52, N52K, N52N, N52T, N51 and N53 valve cover diaphragm repair. It replaces the original plastic diaphragm cover that can crack or warp from engine heat.
This product is the aluminum cover only. It is not a PCV membrane, complete repair kit, complete valve cover or crankcase ventilation valve assembly.
OEM / Reference Numbers
Primary OEM number:
- No confirmed OEM number is specified for the aluminum cover on this product page.
Product reference:
- SKU: KL111275522812
Part Type
- aluminum PCV diaphragm cover
- valve cover diaphragm cap
- PCV membrane cover
- valve cover repair component
- crankcase ventilation diaphragm cover
What This Part Does
The diaphragm cover closes and secures the PCV membrane area on the valve cover. The original plastic cover can crack with age and heat, causing oil leaks at the diaphragm mounting point and poor sealing around the PCV repair area.
Replacing the plastic cover with an aluminum version helps restore sealing and provides a reusable cover for future diaphragm service.
Compatible Vehicles
This aluminum PCV diaphragm cover is listed for BMW engine valve covers using compatible N52, N52K, N52N, N52T, N51 and N53 configurations.
- BMW N52 valve cover applications
- BMW N52K valve cover applications
- BMW N52N valve cover applications
- BMW N52T valve cover applications
- BMW N51 valve cover applications
- BMW N53 valve cover applications
Engine / Engine Family
- BMW N52
- BMW N52K
- BMW N52N
- BMW N52T
- BMW N51
- BMW N53
Common Symptoms of Failure
- cracked plastic PCV diaphragm cover
- oil leaks around the diaphragm mounting point
- poor sealing at the PCV diaphragm area
- vacuum leak symptoms
- unstable crankcase ventilation after diaphragm repair
Why Choose This Replacement
- Aluminum replacement for the original plastic diaphragm cover
- Reusable cover for BMW six-cylinder valve cover PCV repairs
- Helps prevent cracking and heat-related deformation
- Supports proper sealing of the PCV diaphragm area
- Suitable for N52, N52K, N52N, N52T, N51 and N53 valve cover applications
Important Before Ordering
- Confirm that your valve cover uses a compatible PCV diaphragm cover design.
- Check that your engine is BMW N52, N52K, N52N, N52T, N51 or N53.
- Compare the cover shape and mounting design with your original part.
- This product is the aluminum cover only, not the PCV membrane or complete repair kit.
- Do not use SKU KL111275522812 as an OEM number for the cover.
FAQ
What does this aluminum PCV diaphragm cover fit?
This aluminum cover is listed for compatible BMW N52, N52K, N52N, N52T, N51 and N53 valve cover diaphragm repair applications.
Does this aluminum cover have an OEM number?
No confirmed OEM number is specified for the aluminum cover on the product page. SKU KL111275522812 is a product reference, not an OEM number.
What does this PCV diaphragm cover do?
It closes and secures the PCV diaphragm area on the valve cover, helping maintain sealing after diaphragm repair.
What symptoms indicate a failed plastic diaphragm cover?
Common symptoms include visible cracks, oil leaks around the PCV diaphragm area, poor sealing and vacuum leak symptoms.
Is this a complete PCV repair kit?
No. This product is the aluminum cover only. It is not the PCV membrane, complete repair kit or full valve cover assembly.
How do I confirm compatibility before ordering?
Confirm the engine family, compare the cover shape with your original PCV diaphragm cover, and verify that your valve cover uses the same mounting design.
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