11127588412 PCV Repair Kit for BMW N20 Valve Cover
This PCV repair kit is designed for BMW N20 engines using OEM reference 11127588412. It repairs the crankcase ventilation valve area of the valve cover by replacing the failed diaphragm and valve cap.
The kit helps restore correct crankcase ventilation function without replacing the complete valve cover assembly. It is intended for targeted repair of the BMW N20 PCV / breather system when the membrane has crumbled, cracked or failed.
OEM / Reference Numbers
Primary OEM number:
- 11127588412
Secondary OEM / reference numbers:
- No additional OEM or reference numbers are specified on this product page.
Product reference:
- SKU: KL11127588412
Part Type
- PCV repair kit
- crankcase ventilation valve repair kit
- valve cover diaphragm repair kit
- PCV diaphragm and valve cap
- engine breather repair component
- BMW N20 valve cover PCV repair kit
What This Part Does
The crankcase ventilation valve regulates pressure inside the engine crankcase and controls the flow of blow-by gases through the PCV system. On BMW N20 engines, a failed valve cover membrane can allow unmetered air into the engine, affecting mixture control and engine stability.
Replacing the damaged diaphragm and valve cap helps restore PCV system operation, reduce crankcase ventilation faults, and keep the existing valve cover in service when the cover itself is still usable.
Compatible Vehicles
This PCV repair kit is listed for BMW vehicles equipped with the N20 engine.
- BMW 1 Series: F20, F20 LCI, F21, F21 LCI
- BMW 2 Series: F22, F23
- BMW 3 Series: F30, F30 LCI, F31, F31 LCI, F34 GT, F35, F35 LCI
- BMW 4 Series: F32, F33, F36 Gran Coupé
- BMW 5 Series: F07 GT LCI, F10, F10 LCI, F11, F11 LCI, F18, F18 LCI
- BMW X1 E84
- BMW X3 F25
- BMW X4 F26
- BMW X5 F15
- BMW X6 F16
- BMW Z4 E89
Engine / Engine Family
- BMW N20
- BMW turbocharged petrol engine application
Common Symptoms of Failure
- ignition failure
- engine malfunction, especially at idle
- rough or unstable idle
- increased oil consumption
- increased fuel consumption
- unmetered air entering the engine through a failed PCV membrane
- whistling or suction noise from the valve cover area
- vacuum leak symptoms related to PCV diaphragm failure
Why Choose This Replacement
- Targets the exact repair intent for 11127588412
- Includes the PCV diaphragm and valve cap for BMW N20 valve cover repair
- Repairs the failed crankcase ventilation valve area in the existing valve cover
- Cost-effective alternative to replacing the complete valve cover assembly when only the PCV membrane has failed
- Helps restore correct crankcase ventilation and pressure control
- Suitable for BMW N20 applications listed for this repair kit
Important Before Ordering
- Check that your original PCV / valve cover system matches OEM reference 11127588412.
- Confirm that your vehicle is equipped with a BMW N20 engine.
- Compare the diaphragm and valve cap design with the PCV area of your original valve cover.
- This is a PCV repair kit with diaphragm and cap, not a complete valve cover assembly.
- Make sure the spring is correctly positioned during installation.
- Verify compatibility by OEM number, engine type and part design before ordering.
FAQ
What does BMW 11127588412 fit?
BMW 11127588412 is listed for BMW N20 PCV repair applications, including selected BMW 1 Series, 2 Series, 3 Series, 4 Series, 5 Series, X1, X3, X4, X5, X6 and Z4 models shown in the compatibility list.
Are there secondary OEM numbers for 11127588412?
This product page lists 11127588412 as the confirmed OEM reference. No additional OEM or reference numbers are specified for this item on the page.
What does this BMW N20 PCV repair kit do?
It replaces the failed diaphragm and valve cap in the valve cover crankcase ventilation system, helping restore correct PCV pressure regulation.
What symptoms indicate PCV diaphragm failure on BMW N20 engines?
Common symptoms include ignition failure, engine malfunction at idle, rough idle, increased oil consumption, increased fuel consumption, whistling noise and vacuum leak symptoms.
Is this a complete valve cover assembly?
No. This product is a PCV repair kit with a diaphragm and valve cap for the BMW N20 valve cover. It is not a complete valve cover assembly.
How do I confirm compatibility before ordering?
Confirm OEM reference 11127588412, check that your vehicle uses a BMW N20 engine, and compare the diaphragm and cap design with the PCV area of 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