11127793163 Ventilation Unit Membrane for BMW M57, M57N, M57N2, M47, M47N2
This ventilation unit membrane is designed for BMW diesel engines using OEM reference 11127793163. It replaces the worn internal diaphragm in the crankcase ventilation unit and helps restore proper pressure control on BMW M57 and M47 engine family applications.
This product is the membrane only. It is intended for repair of the existing ventilation unit and is not a complete crankcase ventilation assembly.
OEM / Reference Numbers
Primary OEM number:
- 11127793163
Secondary OEM / reference numbers:
- 11127799224
- 11127789822
- 11127781465
- 11127794597
- 11127794175
- 11127791552
- 11122249678
- 11127799225
- 11152248284
Product reference:
- SKU: KL11127793163
Part Type
- ventilation unit membrane
- crankcase ventilation diaphragm
- PCV membrane
- engine breather membrane
- oil separator diaphragm
What This Part Does
The crankcase ventilation membrane controls pressure inside the ventilation unit and supports proper blow-by gas separation. When the diaphragm wears out or tears, crankcase pressure may become unstable and oil vapor control can deteriorate.
Replacing the failed membrane helps restore the function of the existing ventilation unit without replacing the complete assembly.
Compatible Vehicles
This membrane is listed for BMW diesel applications using M57, M57N, M57N2, M47 and M47N2 engine family ventilation units.
- BMW M57 diesel applications
- BMW M57N diesel applications
- BMW M57N2 diesel applications
- BMW M47 diesel applications
- BMW M47N2 diesel applications
Engine / Engine Family / Technical Detail
- BMW M57
- BMW M57N
- BMW M57N2
- BMW M47
- BMW M47N2
- Membrane diameter: 60 mm
Common Symptoms of Failure
- incorrect crankcase pressure
- increased oil consumption
- oil vapor issues in the intake system
- rough or unstable idle
- oil leaks caused by pressure imbalance
- whistling or suction noise from the ventilation unit area
Why Choose This Replacement
- Targets the exact repair intent for 11127793163
- Replaces the failed membrane in the existing ventilation unit
- Uses a 60 mm diaphragm for compatible BMW diesel ventilation units
- Cost-effective alternative to replacing the full crankcase ventilation assembly
- Helps restore crankcase pressure control and breather function
Important Before Ordering
- Check that your original ventilation unit matches 11127793163 or one of the listed reference numbers.
- Confirm that your vehicle uses a compatible BMW M57 or M47 diesel engine.
- Compare the membrane diameter and shape with the diaphragm installed in your original ventilation unit.
- This product is a membrane only, not a complete ventilation unit.
- Verify compatibility by OEM number, engine family and part design before ordering.
FAQ
What does BMW 11127793163 fit?
BMW 11127793163 is listed for ventilation unit membrane repair on compatible BMW M57, M57N, M57N2, M47 and M47N2 diesel engine applications.
Is 11127799224 related to 11127793163?
Yes. 11127799224 is listed as a related reference number for this crankcase ventilation unit application. The main repair focus of this product is the membrane for 11127793163.
What does this ventilation unit membrane do?
The membrane helps regulate crankcase pressure inside the ventilation unit and supports correct blow-by gas management in the engine breather system.
What symptoms indicate ventilation membrane failure?
Common symptoms include incorrect crankcase pressure, increased oil consumption, oil vapor issues, rough idle, oil leaks and whistling or suction noise from the ventilation unit.
Is this a complete ventilation unit?
No. This product is the ventilation unit membrane only. It is not a complete crankcase ventilation assembly.
How do I confirm compatibility before ordering?
Confirm OEM reference 11127793163 or a listed related number, check the engine family, and compare the 60 mm membrane design with your original part.
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