11127568579 PCV Membrane for BMW N45, N45N, N45T
This PCV membrane is designed for BMW N45, N45N and N45T engine applications using valve cover reference 11127568579. It replaces the worn or cracked diaphragm inside the cylinder head cover PCV system and helps restore correct crankcase ventilation function.
The membrane is intended for targeted repair of the existing valve cover ventilation area. It is not a complete valve cover assembly, complete crankcase ventilation valve, or full oil separator unit.
OEM / Reference Numbers
Primary OEM / valve cover reference number:
- 11127568579
Secondary OEM / valve cover reference numbers:
- 11127526665
- 11127565742
- 11127777347
- 11127509524
- 11127526667
- 11127568580
Product reference:
- SKU: KL11127568579
Part Type
- PCV membrane
- cylinder head cover membrane
- valve cover diaphragm
- crankcase ventilation diaphragm
- engine breather membrane
- PCV valve cover repair component
What This Part Does
The PCV membrane regulates crankcase pressure and controls the flow of blow-by gases through the crankcase ventilation system. When the original membrane becomes hard, cracked or torn, the engine can develop unstable ventilation pressure and unbalanced operation.
Replacing the failed membrane helps restore the sealing and pressure-control function of the valve cover PCV area while keeping the original valve cover in service.
Compatible Vehicles
This PCV membrane is listed for BMW vehicles with compatible N45, N45N and N45T engine applications.
- BMW vehicles with N45 engines
- BMW vehicles with N45N engines
- BMW vehicles with N45T engines, where the valve cover design matches this membrane
Specific chassis codes, model years and trim versions are not detailed on this product page. Compatibility should be confirmed by checking the original valve cover number and comparing the membrane design.
Engine / Engine Family / Technical Detail
- BMW N45
- BMW N45N
- BMW N45T
- Soft flexible oil- and gasoline-resistant membrane material
- Designed to match the dimensions of the original membrane
Common Symptoms of Failure
- intermittent or unstable idle
- unbalanced engine operation
- ignition interruptions
- oil stains in the engine compartment
- loss of membrane elasticity
- cracked or hardened PCV membrane
- incorrect crankcase ventilation pressure
- vacuum leak symptoms from the valve cover PCV area
Why Choose This Replacement
- Targets the exact repair intent for 11127568579
- Also supports related BMW valve cover references listed for this membrane
- Replaces the failed PCV membrane inside the existing valve cover
- Cost-effective alternative to replacing the complete ventilation valve or valve cover assembly when only the membrane has failed
- Helps restore crankcase ventilation and pressure control
- Suitable for BMW N45 engine family PCV membrane repair
Important Before Ordering
- Check that your original valve cover number matches 11127568579 or one of the listed reference numbers.
- Confirm that your vehicle uses a compatible BMW N45, N45N or N45T engine.
- Compare the membrane shape and size with the diaphragm installed in your original valve cover.
- This product is a PCV membrane only, not a complete valve cover assembly.
- Verify compatibility by valve cover number, engine type and part design before ordering.
FAQ
What does BMW 11127568579 fit?
BMW 11127568579 is listed as a valve cover reference for this PCV membrane on BMW N45, N45N and N45T engine applications. Fitment should be confirmed by checking the original valve cover number and membrane design.
Is 11127526665 the same type of reference as 11127568579?
11127526665 is listed as a related original valve cover number for this PCV membrane application. The main SEO and repair focus remains 11127568579.
What does this BMW PCV membrane do?
The PCV membrane helps regulate crankcase pressure and supports controlled ventilation of blow-by gases through the valve cover PCV system.
What symptoms indicate PCV membrane failure on BMW N45 engines?
Common symptoms include intermittent idle, unbalanced engine operation, ignition interruptions, oil stains in the engine compartment, cracked membrane material and vacuum leak symptoms.
Is this a complete crankcase ventilation valve or valve cover assembly?
No. This product is the PCV membrane only. It is not a complete crankcase ventilation valve, complete oil separator or full valve cover assembly.
How do I confirm compatibility before ordering?
Confirm the original valve cover reference number, check that your engine is BMW N45, N45N or N45T, and compare the replacement membrane with the diaphragm installed in your existing valve cover.
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