11127646553 Valve Cover Diaphragm for BMW / MINI N13, N16, N18
This valve cover diaphragm is designed for BMW / MINI N13, N16 and N18 engine applications using OEM reference 11127646553. It replaces the failed PCV membrane in the valve cover crankcase ventilation system and helps restore correct pressure regulation.
The diaphragm is intended for targeted repair of the existing valve cover PCV area. It is not a complete valve cover assembly, complete crankcase ventilation valve, or full oil separator unit.
OEM / Reference Numbers
Primary OEM number:
- 11127646553
Secondary OEM / reference numbers:
- 11127646552
- 11127603390
- 11127601863
Product reference:
- SKU: KL11127646553
Part Type
- valve cover diaphragm
- PCV membrane
- crankcase ventilation diaphragm
- engine breather membrane
- oil separator diaphragm
- valve cover PCV repair component
What This Part Does
The valve cover diaphragm regulates crankcase pressure and controls the flow of blow-by gases and oil vapor through the PCV system. When the original membrane becomes worn, hardened or torn, the ventilation system may lose proper pressure control.
Replacing the failed diaphragm helps restore crankcase ventilation function, reduce oil vapor issues and support stable engine operation on compatible N13, N16 and N18 applications.
Compatible Vehicles
This valve cover diaphragm is listed for MINI vehicles with N13, N16 and N18 engine applications.
- MINI Cabrio R57 — 2007-2015
- MINI Clubman R55 — 2007-2014
- MINI Countryman R60 — 2010-2016
- MINI Coupe R58 — 2011-2015
- MINI Paceman R61 — from 2012
- MINI R56 — 2005-2014
- MINI Roadster R59
Engine / Engine Family
- BMW / MINI N13
- BMW / MINI N16
- BMW / MINI N18
Common Symptoms of Failure
- whistling noise from the valve cover or PCV area
- rough or unstable idle
- increased oil consumption
- valve cover leak symptoms related to PCV pressure imbalance
- oil separator or breather system malfunction symptoms
- vacuum leak symptoms
- incorrect crankcase pressure
Why Choose This Replacement
- Targets the exact repair intent for 11127646553
- Also supports related OEM references 11127646552, 11127603390 and 11127601863
- Replaces the failed PCV diaphragm inside the existing valve cover
- Cost-effective alternative to replacing the complete valve cover when only the membrane has failed
- Helps restore crankcase ventilation and pressure control
- Suitable for MINI N13, N16 and N18 valve cover diaphragm repair
Important Before Ordering
- Check that your original valve cover or PCV system matches 11127646553 or one of the listed reference numbers.
- Confirm that your vehicle uses an N13, N16 or N18 engine.
- Compare the diaphragm shape and mounting design with the membrane installed in your original valve cover.
- This product is a valve cover diaphragm / PCV membrane only, not a complete valve cover assembly.
- Verify compatibility by OEM number, engine type and part design before ordering.
FAQ
What does 11127646553 fit?
11127646553 is listed for valve cover diaphragm repair on BMW / MINI N13, N16 and N18 engine applications, including MINI R55, R56, R57, R58, R59, R60 and R61 models shown in the compatibility list.
Is 11127646552 the same type of part as 11127646553?
11127646552 is listed as a related OEM valve cover diaphragm reference for this application. The main SEO and repair focus remains OEM 11127646553.
What does this valve cover diaphragm do?
The diaphragm regulates crankcase pressure and controls blow-by gas and oil vapor flow through the PCV system built into the valve cover.
What symptoms indicate PCV diaphragm failure on N13, N16 or N18 engines?
Common symptoms include whistling noise, rough idle, increased oil consumption, vacuum leak symptoms, oil separator malfunction symptoms and incorrect crankcase pressure.
Is this a complete valve cover assembly?
No. This product is a valve cover diaphragm / PCV membrane only. It is not a complete valve cover assembly, complete PCV valve or full oil separator unit.
How do I confirm compatibility before ordering?
Confirm OEM number 11127646553 or one of the listed related references, check that your engine is N13, N16 or N18, and compare the diaphragm design with the membrane installed in your original 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