11122246330 PCV Membrane for BMW M51 E36, E34, E39, E38
This crankcase ventilation membrane is designed for BMW M51 diesel engines using OEM reference 11122246330. It replaces the failed diaphragm in the crankcase ventilation system and helps restore correct pressure control.
This product is the membrane only. It is not a complete crankcase ventilation valve, complete oil separator, or full breather assembly.
OEM / Reference Numbers
Primary OEM number:
- 11122246330
Secondary OEM / reference numbers:
- 11129069261
- 11122243202
- 11 12 2 246 330
- 11 12 9 069 261
- 11 12 2 243 202
Additional reference numbers:
- 3911171906
- 2246619
Product reference:
- SKU: KL11122246330
Part Type
- crankcase ventilation membrane
- PCV membrane
- oil separator diaphragm
- engine breather membrane
- BMW M51 crankcase ventilation diaphragm
What This Part Does
The crankcase ventilation membrane helps regulate crankcase pressure and controls blow-by gas flow through the diesel engine breather system. When the original membrane becomes worn or torn, pressure control can be disrupted and the engine may show ventilation-related issues.
Replacing the membrane helps restore the function of the existing crankcase ventilation unit while avoiding unnecessary replacement of the complete assembly.
Compatible Vehicles
This PCV membrane is listed for BMW M51 diesel engine applications.
- BMW E36 with M51 diesel engine
- BMW E34 with M51 diesel engine
- BMW E39 with M51 diesel engine
- BMW E38 with M51 diesel engine
Engine / Engine Family
- BMW M51 diesel
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
- crankcase ventilation malfunction symptoms
Why Choose This Replacement
- Targets the exact repair intent for 11122246330
- Supports related BMW references 11129069261 and 11122243202
- Replaces the failed membrane inside the existing crankcase ventilation system
- Cost-effective alternative to replacing the complete ventilation assembly when only the diaphragm has failed
- Suitable for BMW M51 diesel PCV membrane repair
Important Before Ordering
- Check that your original crankcase ventilation component matches 11122246330 or one of the listed reference numbers.
- Confirm that your vehicle uses a BMW M51 diesel engine.
- Compare the membrane design with the diaphragm installed in your original part.
- This product is a membrane only, not a complete crankcase ventilation assembly.
- Verify compatibility by OEM number, engine type and part design before ordering.
FAQ
What does BMW 11122246330 fit?
BMW 11122246330 is listed for crankcase ventilation membrane repair on BMW M51 diesel applications, including E36, E34, E39 and E38 vehicle families.
Is 11129069261 related to 11122246330?
Yes. 11129069261 is listed as a related BMW reference for this crankcase ventilation membrane application. The main repair focus remains OEM 11122246330.
What does this BMW M51 PCV membrane do?
The membrane helps regulate crankcase pressure and controls blow-by gas flow through the engine breather system.
What symptoms indicate crankcase ventilation membrane failure?
Common symptoms include incorrect crankcase pressure, increased oil consumption, oil vapor issues, unstable idle and oil leaks caused by pressure imbalance.
Is this a complete crankcase ventilation valve?
No. This product is the crankcase ventilation membrane only. It is not a complete valve, complete oil separator or full breather assembly.
How do I confirm compatibility before ordering?
Confirm OEM reference 11122246330 or a listed related number, check that your engine is BMW M51, and compare the 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