Premium OEM Replacement Engine Cylinder Head Valve Cover Kit

This engine cylinder head valve cover kit is compatible with the following BMW models fitted with the 3.0L N54 Twin-Turbo Inline 6-Cylinder engine:

• BMW 1 Series: 135i (2008–2010)
• BMW 3 Series: 335i, 335xi, 335i xDrive (2007–2010)
• BMW 5 Series: 535i, 535xi, 535i xDrive (2008–2010)
• BMW 6 Series: xDrive35i (2008–2010)
• BMW Z4: sDrive35i, sDrive35is (2009–2016)

To confirm 100% exact fitment, please match the OE Part Numbers in our specifications against those on your original factory valve cover, or contact us with your vehicle's VIN before purchasing.

The cylinder head valve cover is a critical engine component that seals the top of the cylinder head, covering the camshaft, valve springs, and related components. Its primary functions include:

• Oil Containment: Prevents engine oil from escaping from the valve train and cam area
• Crankcase Pressure Management: Maintains proper ventilation through the PCV system to prevent pressure buildup
• Contaminant Prevention: Seals out moisture, dirt, and debris from entering the cylinder head
• Ignition Coil Housing: On BMW N54 engines, the valve cover integrates ignition coil mounts and electrical connectors
• Thermal Management: Helps regulate cylinder head temperature under the extreme conditions of the N54 twin-turbo engine

A worn or cracked valve cover causes oil leaks, poor engine performance, and potential damage to ignition components.

Common symptoms of a failing or damaged valve cover on a BMW N54 engine include:

• Visible oil leaks around the valve cover edges or gasket seams
• Oil dripping onto the engine block or beneath the car
• Burning smell from the engine compartment caused by oil on hot engine surfaces
• Check Engine Light illuminated — often related to ignition coil or PCV system faults
• Rough idle or misfires caused by moisture entering the ignition coil area
• Visible cracking, warping, or physical damage to the valve cover
• Moisture or condensation inside the spark plug wells
• PCV hose disconnection or blockage due to gasket material breakdown

If any of these symptoms are present, have the valve cover and gaskets inspected by a qualified technician before replacing components.

Self-installation is not recommended. Professional installation by a qualified technician is strongly recommended for the following reasons:

• Coil Pack Removal: BMW N54 engines require careful disconnect and reinstallation of six ignition coil packs mounted directly to the valve cover
• Hose Management: Multiple PCV hoses, breather lines, and vacuum connections must be correctly reconnected and inspected for cracks
• Gasket Installation: The integrated gasket kit must be properly seated along the entire perimeter to ensure an airtight seal
• Torque Sequencing: Valve cover bolts must be torqued to specification in the correct sequence to prevent warping or leaks
• Seal Integrity Testing: After installation, a leak test is recommended to confirm full seal integrity before returning the vehicle to service
• Warranty Activation: Professional installation is required to validate your extended warranty

BMW N54 engines are known for valve cover gasket failures for several reasons:

• High Operating Temperatures: Twin-turbo engines run hotter than naturally aspirated engines, which accelerates gasket material degradation
• Oil Pressure & Temperature: The combination of high oil pressure and temperature puts stress on the gasket seal
• PCV System Demand: The positive crankcase ventilation system works harder on turbo engines, increasing crankcase pressure
• Component Integration: Ignition coils mounted directly to the valve cover create additional stress points and thermal cycling
• Age & Mileage: Factory gaskets typically fail between 80,000 and 120,000 miles due to material fatigue and thermal cycling

Replacing the valve cover with a quality aftermarket or OEM unit and new gasket kit is a common maintenance item on high-mileage N54 engines.

The six ignition coils (coil packs) are mounted directly on the N54 valve cover but are typically NOT included in this valve cover kit. However, while the valve cover is removed, it is an ideal time to inspect and replace ignition coils if needed:

• Coil Inspection: Check each coil for signs of oil infiltration, cracking, or corrosion from valve cover leaks
• Preventive Replacement: If your N54 has high mileage (100,000+), consider replacing all six coils proactively to avoid future misfires
• Cost-Effectiveness: Ignition coil replacement during valve cover service adds minimal labour cost compared to replacing them separately later
• Spark Plug Access: With the valve cover removed, spark plug inspection and replacement is also convenient

Consult your mechanic about coil replacement recommendations for your specific mileage and condition.

This is a high-quality aftermarket replacement part manufactured by D2P Autoparts and engineered to meet or exceed BMW's OEM (Original Equipment Manufacturer) specifications. It is 100% brand new and designed as a direct replacement for the factory valve cover on all N54-equipped BMW models.

It delivers the same fit, sealing performance, component integration (ignition coil mounts, PCV connections), and dimensional accuracy as the original BMW component — at a more competitive price point than a genuine BMW part, without compromising on quality or long-term reliability.

This product includes an Extended Warranty under the following terms:

• 10-Year Extended Warranty: Applies when installed by a fully qualified professional
• Activation: Provide a copy of the fitment garage invoice within 30 days of installation to activate your 10-Year Extended Warranty
• Standard Coverage: If no garage invoice is submitted within 30 days of purchase, coverage defaults to a standard 1-year warranty
• Coverage Scope: Warranty covers manufacturing and material defects only; labour and additional expenses are excluded

D2P Autoparts stands behind the durability and quality of its products. If you experience any product-related issue within the warranty period, please contact us with your proof of professional installation.

The N54 is BMW's first direct-injection turbocharged inline 6-cylinder engine, producing 300+ horsepower and known for strong performance and distinctive engine character. It was produced from 2006 to 2010 and is found in:

• BMW 1 Series: 135i (2008–2010) — 306 hp
• BMW 3 Series: 335i, 335xi, 335i xDrive — 306–335 hp depending on year and market
• BMW 5 Series: 535i, 535xi, 535i xDrive — 300–306 hp
• BMW 6 Series: 650i (2004–2010) and xDrive35i (2008–2010)
• BMW Z4: Z4 sDrive35i (2009+) and sDrive35is (2011+) — 300–335 hp

The N54 is a legendary engine in the enthusiast community, valued for its performance, tuning potential, and distinctive twin-scroll turbo architecture. However, it is known for valve cover gasket leaks and carbon buildup issues typical of first-generation direct-injection engines.

On a BMW N54 engine, professional valve cover replacement typically takes between 3 to 5 hours of labour, depending on the technician's experience and whether additional work (such as spark plug replacement or ignition coil replacement) is performed simultaneously:

• Valve Cover Only: 3–4 hours (coil pack removal/reinstallation, hose disconnect/reconnect, gasket replacement, torque sequencing)
• With Spark Plugs: Add 1–2 hours
• With Ignition Coils: Add 1–2 hours
• With PCV System Cleaning: Add 1 hour

Consult your BMW service facility or qualified independent shop for a specific time estimate based on your vehicle's condition and any additional work recommended.

To confirm 100% compatibility before purchasing, follow these steps:

• Check Make & Model: Confirm your BMW is a 1-, 3-, 5-, 6-, or Z-Series model from 2007–2016
• Verify Engine: Confirm your vehicle is fitted with the 3.0L N54 Twin-Turbo engine — this is critical, as later models use the N55 or S55 engines
• Match OE Part Numbers: Compare the part numbers in our specifications (11127565284, 11-12-7-565-284, 11127565284KIT, 11127565284BM) against the number stamped or labelled on your original valve cover
• Contact Us with Your VIN: Provide your Vehicle Identification Number and our team will confirm exact fitment before you place your order

Checking the OE part number on your existing factory unit is the most reliable method to guarantee correct fitment for your specific BMW.