BMW PCV Valve Repair Kit – Crankcase Ventilation Diaphragm for N45 & M56 Engines | Fits E46, E90, E87 | Replaces 11127568579, 11127521086

Stop Vacuum Leaks and Oil Consumption Without Replacing the Entire Valve Cover

Is your BMW engine idling roughly, consuming more oil than usual, or throwing a "Check Engine" light for lean fuel trim? A torn or hardened PCV (Crankcase Ventilation) diaphragm is a common failure point for N45 and M56 engines.

BMW does not sell the diaphragm separately—they require you to purchase the entire valve cover assembly, which is a costly and often unnecessary expense. The Klifex PCV Repair Kit provides a high-quality, direct-fit replacement membrane that restores proper engine vacuum and ventilation at a fraction of the dealership price.

Common Failure Symptoms:

• Rough Idle: Unmetered air entering the engine due to a ruptured membrane.

• Whistling Noise: High-pitched sound coming from the valve cover at idle.

• Increased Oil Consumption: Oil vapors being pulled directly into the combustion chamber.

• Check Engine Light (CEL): Often accompanied by vacuum leak or fuel trim codes.

Why Choose the Klifex Repair Kit?

• Direct OEM Alternative: Precision-engineered to match the dimensions and tension of the factory diaphragm.

• Durable Construction: Made from high-strength, oil-resistant elastomer designed to withstand the heat cycles of the BMW engine bay.

• Cost-Efficient Fix: Avoid the high cost of a complete valve cover (especially the expensive M56 SULEV version).

• DIY Friendly: Designed for straightforward installation, allowing you to restore your engine's performance without specialized shop tools.

Vehicle & Engine Compatibility:

Engines: N45, N45N, N45T, and M56 (SULEV).

Compatible Models:

• 3 Series: E46 (M56), E90 & E90 LCI (316i, 320si)

• 1 Series: E81, E87 & E87 LCI (116i)

Compatible Valve Cover OEM Part Numbers:

• 11127568579, 11127526665

• 11127521086, 11127509524, 11127526667, 11127568580

• 11127565742, 11127777347 (BMW 320si Limited Edition)

• BMW

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