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11127846359 PCV Valve Cover Repair Kit for BMW S55 M2, M3, M4
This PCV valve cover repair kit is designed for BMW S55 3.0L Twin-Turbo engines using OEM number 11127846359. The kit replaces the failed PCV diaphragm and cap inside the valve cover, helping restore correct crankcase ventilation without replacing the complete valve cover assembly.
It is intended for BMW M2 Competition, M3 and M4 applications equipped with the S55 engine, where PCV diaphragm failure can cause whistling noise, rough idle, oil consumption, vacuum leaks, misfires or check engine light symptoms.
OEM / Reference Numbers
Primary OEM number:
- 11127846359
Alternative OEM formats:
- 11-12-7-846-359
- 11 12 7 846 359
Part Type
- PCV valve cover repair kit
- PCV diaphragm and cap repair kit
- crankcase ventilation repair kit
- valve cover PCV membrane repair kit
- engine breather diaphragm repair kit
What This Part Does
The PCV diaphragm controls crankcase pressure and regulates blow-by gas flow through the crankcase ventilation system. In BMW S55 twin-turbo engines, the PCV system operates under high heat, pressure and oil vapor exposure, which can cause the original diaphragm to crack, harden or tear over time.
Replacing the failed diaphragm and cap helps restore correct crankcase pressure, reduce vacuum leaks, improve idle stability and support proper engine response.
Compatible Vehicles
This PCV repair kit is listed for BMW vehicles equipped with the S55 3.0L Twin-Turbo engine.
- BMW M2 Competition F87 LCI — 2016–2019
- BMW M3 Sedan F80 / F80 LCI — 2012–2018
- BMW M4 Coupe F82 — 2013–2020
- BMW M4 Convertible F83 — 2013–2020
Engine / Engine Family
- BMW S55
- 3.0L Twin-Turbo
- High-performance BMW M engine application
Common Symptoms of Failure
- high-pitched whistling noise at idle
- rough or unstable idle
- increased oil consumption
- vacuum leaks
- poor engine response
- misfires
- check engine light
- oil leaks caused by incorrect crankcase pressure
Why Choose This Replacement
- Targets the exact OEM repair intent for 11127846359
- Replaces the failed PCV diaphragm and cap
- Repairs the existing valve cover PCV system
- Cost-effective alternative to replacing the full valve cover assembly
- Helps restore correct crankcase pressure and ventilation function
- Designed for BMW S55 twin-turbo engine conditions
Important Before Ordering
- Check that your original valve cover part number matches 11127846359 or one of the listed OEM formats.
- Confirm that your vehicle is equipped with the BMW S55 3.0L Twin-Turbo engine.
- Compare the diaphragm and cap design with the PCV section of your original valve cover.
- This is a PCV valve cover repair kit, not a complete valve cover assembly.
- Verify compatibility by OEM number, engine type and vehicle application before ordering.
FAQ
What does BMW 11127846359 fit?
BMW 11127846359 is listed for BMW S55 3.0L Twin-Turbo applications, including BMW M2 Competition F87 LCI, BMW M3 F80 / F80 LCI and BMW M4 F82 / F83 models.
Is 11-12-7-846-359 the same part number as 11127846359?
Yes. 11-12-7-846-359 and 11 12 7 846 359 are alternative BMW OEM formats for the same part number 11127846359.
What does this PCV valve cover repair kit do?
The kit replaces the failed PCV diaphragm and cap inside the valve cover. It helps restore crankcase pressure regulation and proper ventilation system function.
What symptoms indicate BMW S55 PCV diaphragm failure?
Common symptoms include whistling noise at idle, rough idle, increased oil consumption, vacuum leaks, poor engine response, misfires and check engine light.
Is this a complete valve cover assembly?
No. This product is a PCV valve cover repair kit with a diaphragm and cap. It is not a complete valve cover assembly.
How do I confirm compatibility before ordering?
Confirm the OEM number 11127846359, check that your vehicle has the BMW S55 engine, and compare the diaphragm and cap design with the PCV section 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