Aluminum PCV Diaphragm Cover for BMW N52, N53, N51
This aluminum PCV diaphragm cover is designed for BMW N52, N52K, N52N, N52T, N51 and N53 valve cover diaphragm repair. It replaces the fragile original plastic cover used over the crankcase ventilation membrane and helps make future PCV membrane service easier.
The part is intended for the valve cover diaphragm area only. It is not a PCV membrane, not a complete PCV valve, and not a complete valve cover assembly.
OEM / Reference Numbers
Primary OEM number:
- No confirmed primary OEM number is specified on this product page.
Secondary OEM / reference numbers:
- No additional OEM or reference numbers are specified on this product page.
Product reference:
- SKU: KL111275522812
Part Type
- aluminum PCV diaphragm cover
- valve cover diaphragm cover
- PCV membrane cover
- crankcase ventilation membrane cap
- KVKG N52 aluminum cover
- valve cover repair component
What This Part Does
The aluminum cover secures the PCV diaphragm area on the valve cover and replaces the original plastic membrane cover. The factory plastic cover can break during disassembly or repair, especially when the PCV membrane needs to be replaced.
Installing the aluminum cover allows the diaphragm area to be serviced more reliably. The cover can be reused, helps dissipate heat, and supports future membrane replacement without removing the complete valve cover when the design allows service access.
Compatible Vehicles
This aluminum diaphragm cover is listed for BMW applications with the following engine families:
- BMW N52
- BMW N52K
- BMW N52N
- BMW N52T
- BMW N51
- BMW N53
Specific BMW models, production years and chassis codes are not detailed on this product page. Compatibility must be confirmed by comparing the PCV diaphragm cover design with the original valve cover.
Engine / Engine Family / Technical Detail
- BMW N52-family crankcase ventilation applications
- Aluminum replacement cover
- Reusable construction
- Designed for valve cover diaphragm service
Common Symptoms of Failure
- broken or cracked plastic diaphragm cover during PCV repair
- damaged PCV membrane cover after disassembly
- poor sealing around the diaphragm cover area
- whistling or suction noise if the PCV area does not seal correctly
- rough idle related to crankcase ventilation leakage
- vacuum leak symptoms from the valve cover diaphragm area
- need to replace the PCV membrane without replacing the complete valve cover
Why Choose This Replacement
- Replaces the fragile plastic diaphragm cover with an aluminum cover
- Allows repeated access to the PCV membrane area
- Supports membrane replacement without replacing the complete valve cover
- Aluminum construction helps reduce the risk of cover breakage during future service
- Helps keep the existing BMW N52-family valve cover in service when only the diaphragm cover area needs repair
- Cost-effective repair component for BMW crankcase ventilation service
Important Before Ordering
- Check that your vehicle uses a compatible BMW N52, N52K, N52N, N52T, N51 or N53 valve cover design.
- Compare the aluminum cover shape with the original PCV diaphragm cover before ordering.
- This product is the aluminum cover only; it is not the PCV membrane.
- This is not a complete valve cover assembly or complete crankcase ventilation valve.
- If your PCV membrane is damaged, order the correct membrane separately or choose a complete repair kit that includes the required components.
FAQ
What does this aluminum PCV diaphragm cover fit?
This aluminum cover is listed for BMW valve cover diaphragm applications with N52, N52K, N52N, N52T, N51 and N53 engines. Exact fitment should be confirmed by comparing the cover design with the original valve cover.
Does this product replace OEM 11127552281?
This page does not list 11127552281 as a confirmed OEM replacement number for the aluminum cover. The product should be selected by engine family and by matching the diaphragm cover design.
What does this aluminum diaphragm cover do?
It replaces the plastic cover over the PCV diaphragm area on the valve cover and helps make the crankcase ventilation membrane area reusable and easier to service.
What symptoms indicate a damaged PCV diaphragm cover?
Possible symptoms include a cracked or broken plastic cover, poor sealing around the PCV diaphragm area, whistling noise, vacuum leak symptoms and unstable idle caused by crankcase ventilation leakage.
Is this a PCV membrane or complete valve cover assembly?
No. This product is the aluminum cover for the valve cover diaphragm area only. It is not the PCV membrane, not a complete PCV valve and not a complete valve cover assembly.
How do I confirm compatibility before ordering?
Confirm your BMW engine family, inspect the valve cover PCV diaphragm area, and compare the shape and mounting design of the aluminum cover with the original plastic cover before ordering.
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