11127553626 Valve Cover Diaphragm for BMW N43
This valve cover diaphragm is designed for BMW N43 engine applications using valve cover reference 11127553626. It replaces the failed PCV membrane built into the valve cover and helps restore correct crankcase ventilation pressure regulation.
This product is the diaphragm only. It is not a complete valve cover assembly or full crankcase ventilation valve.
OEM / Reference Numbers
Primary OEM / valve cover reference number:
- 11127553626
Secondary OEM / reference numbers:
- No additional OEM or reference numbers are specified on this product page.
Product reference:
- SKU: KL11127553626
Part Type
- valve cover diaphragm
- PCV membrane
- crankcase ventilation diaphragm
- engine breather membrane
- BMW N43 valve cover PCV repair component
What This Part Does
The valve cover diaphragm regulates crankcase pressure and controls the flow of blow-by gases through the PCV system. When the membrane breaks, the engine can draw unmetered air through the damaged diaphragm and lose correct mixture and pressure control.
Replacing the failed diaphragm helps restore crankcase ventilation function while keeping the existing BMW N43 valve cover in service.
Compatible Vehicles
This valve cover diaphragm is listed for BMW vehicles equipped with the N43 engine and valve cover reference 11127553626.
- BMW 1 Series E81
- BMW 1 Series E82
- BMW 1 Series E87 LCI
- BMW 1 Series E88
- BMW 3 Series E90
- BMW 3 Series E90 LCI
- BMW 3 Series E91
- BMW 3 Series E91 LCI
- BMW 3 Series E92
- BMW 3 Series E92 LCI
- BMW 3 Series E93
- BMW 3 Series E93 LCI
- BMW 5 Series E60 LCI
- BMW 5 Series E61 LCI
Engine / Engine Family / Technical Detail
- BMW N43
- Membrane diameter: 80 mm
- Designed for valve cover PCV diaphragm repair
Common Symptoms of Failure
- unstable idle
- smoke from the exhaust
- increased oil consumption
- check engine light
- poor mixture caused by unmetered air through the torn membrane
- vacuum leak symptoms
- incorrect crankcase pressure
Why Choose This Replacement
- Targets the exact repair intent for 11127553626
- Replaces the failed 80 mm 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 BMW N43 valve cover PCV membrane repair
Important Before Ordering
- Check that your original valve cover reference matches 11127553626.
- Confirm that your vehicle uses a BMW N43 engine.
- Compare the 80 mm diaphragm design with the membrane installed in your original valve cover.
- This product is a valve cover diaphragm only, not a complete valve cover assembly.
- Verify compatibility by OEM number, engine type and part design before ordering.
FAQ
What does BMW 11127553626 fit?
BMW 11127553626 is listed for valve cover PCV diaphragm repair on BMW N43 engine applications, including selected BMW 1 Series, 3 Series and 5 Series models shown in the compatibility list.
Are there secondary OEM numbers for this 11127553626 diaphragm?
This product page lists 11127553626 as the confirmed valve cover reference number. No additional OEM or reference numbers are specified for this diaphragm item.
What does this BMW N43 valve cover diaphragm do?
The diaphragm regulates crankcase pressure and controls blow-by gas flow through the valve cover PCV system.
What symptoms indicate PCV diaphragm failure on BMW N43 engines?
Common symptoms include unstable idle, smoke, increased oil consumption, check engine light, poor mixture caused by unmetered air and vacuum leak symptoms.
Is this a complete valve cover assembly?
No. This product is the valve cover diaphragm / PCV membrane only. It is not a complete valve cover assembly.
How do I confirm compatibility before ordering?
Confirm OEM number 11127553626, check that your vehicle uses a BMW N43 engine, and compare the 80 mm diaphragm 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