11127552281 / 11127548196 PCV Membrane for BMW N52, N51, N53
This standalone PCV membrane is designed for BMW N51, N52, N52N, N52K, N52T and N53 engines using OEM references 11127552281 and 11127548196. It replaces the failed rubber diaphragm inside the crankcase ventilation system and helps restore correct PCV pressure control.
This replacement membrane is intended for vehicles already equipped with an aftermarket metal cap kit. If your vehicle still has the original plastic factory cap, a full PCV repair kit with both the membrane and metal cap is required for proper installation.
OEM / Reference Numbers
Primary OEM numbers:
- 11127552281
- 11127548196
Secondary OEM / reference numbers:
- No additional OEM or reference numbers are specified on this product page.
Product reference:
- SKU: KL111275522811
Part Type
- PCV membrane
- crankcase ventilation diaphragm
- valve cover PCV membrane
- PCV diaphragm replacement
- crankcase ventilation valve membrane
- standalone replacement membrane for metal cap kit
What This Part Does
The PCV membrane regulates crankcase pressure and controls the flow of blow-by gases through the crankcase ventilation system. In BMW N52-series engines, the PCV system is integrated into the valve cover, and the rubber diaphragm can dry out, crack or tear due to heat and oil vapor exposure.
A failed membrane can allow unmetered air into the system, causing excessive vacuum, unstable fuel trims, oil consumption and drivability issues. Replacing the membrane helps restore correct crankcase ventilation while keeping the existing valve cover and metal cap repair setup in service.
Compatible Vehicles
This PCV membrane is listed for BMW vehicles equipped with compatible N51, N52, N52N, N52K, N52T and N53 engines.
- BMW 1 Series: E81, E82, E87 LCI, E88
- BMW 3 Series: E90, E91, E92, E93, including LCI versions
- BMW 5 Series: E60 LCI, E61 LCI, F10, F11, F18, including LCI versions
- BMW 6 Series: E63 LCI, E64 LCI
- BMW 7 Series: E65, E66, F01, F02, including LCI versions
- BMW X Series: X1 E84, X3 E83 LCI, X3 F25, X5 E70
- BMW Z Series: Z4 E85, E86, E89
Engine / Engine Family / Technical Detail
- BMW N51
- BMW N52
- BMW N52N
- BMW N52K
- BMW N52T
- BMW N53
- Oil-resistant high-temperature replacement membrane
- For use with aftermarket metal cap kit
Common Symptoms of Failure
- high-pitched whistling or squealing noise from the rear of the engine
- rough idle or engine hesitation at stoplights
- increased oil consumption
- blue smoke from the exhaust
- misfires and poor throttle response
- difficulty opening the oil cap while the engine is running due to excessive vacuum
- lean mixture faults such as P0171 or P0174
- random or multiple misfire fault P0300
- fuel trim lean faults such as P1071 or P1074
Why Choose This Replacement
- Targets exact OEM repair intent for 11127552281 and 11127548196
- Replaces the failed PCV membrane without replacing the complete valve cover
- Designed for BMW N51, N52 and N53 crankcase ventilation applications
- Suitable for vehicles already converted to an aftermarket metal cap kit
- Helps restore correct crankcase pressure and reduce vacuum leak symptoms
- Cost-effective repair option when only the PCV membrane has failed
Important Before Ordering
- Check that your original valve cover or PCV system matches 11127552281 or 11127548196.
- Confirm that your vehicle uses a BMW N51, N52, N52N, N52K, N52T or N53 engine.
- Verify that your vehicle already has an aftermarket metal cap kit installed.
- If your vehicle still has the original plastic factory cap, order the full PCV repair kit with membrane and metal cap instead.
- This product is a PCV membrane only, not a complete valve cover assembly and not a complete PCV repair kit with cap.
- Compare the membrane design with the part installed in your current PCV repair setup before ordering.
FAQ
What does BMW 11127552281 fit?
BMW 11127552281 is listed for PCV membrane repair on BMW N51, N52, N52N, N52K, N52T and N53 engine applications, including compatible BMW 1 Series, 3 Series, 5 Series, 6 Series, 7 Series, X1, X3, X5 and Z4 models.
Is 11127548196 the same type of part as 11127552281?
Yes. Both 11127552281 and 11127548196 are listed as primary OEM references for this BMW PCV membrane application. Always confirm the valve cover and repair cap design before ordering.
What does this BMW PCV membrane do?
The PCV membrane regulates crankcase pressure and controls blow-by gas flow through the crankcase ventilation system. Replacing a torn membrane helps restore correct pressure control and reduce vacuum leak symptoms.
What symptoms indicate PCV membrane failure on BMW N52 engines?
Common symptoms include whistling noise, rough idle, hesitation, increased oil consumption, blue smoke, misfires, poor throttle response, excessive vacuum and lean mixture fault codes.
Is this a complete valve cover or full PCV repair kit?
No. This product is the replacement PCV membrane only. It is not a complete valve cover assembly and does not include the metal cap.
Can I install this membrane with the original plastic factory cap?
No. This membrane is intended for vehicles already equipped with an aftermarket metal cap kit. If your vehicle still has the original plastic factory cap, use a full PCV repair kit that includes both the membrane and the metal cap.
How do I confirm compatibility before ordering?
Confirm OEM number 11127552281 or 11127548196, check your BMW engine code, verify that an aftermarket metal cap kit is already installed, and compare the membrane design with your current PCV repair setup.
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