BMW N55 Spark Plug Recess Insert Gasket - Genuine OEM Valve Cover Tube/Well Seal 11127573439 (11 12 7 573 439) | Fits 135i 335i 535i 640i X3 35iX X5 35iX X6 35iX (E82 E90 F10 F12 F25 E70 E71)

Genuine BMW N55 Plug Tube Seal for Cam Cover - Part No. 11127573439

Stop oil creeping into the ignition wells on your turbo straight-six. This genuine BMW cam cover plug tube seal is the factory replacement for N55 engines and is the proven cure for oil in the coil wells, rough idle and intermittent misfires caused by leaking tube gaskets. It restores a tight seal around the plug tubes so your coil packs stay clean and dry, helping your N55 run smoothly and reliably.

Part number: 11127573439 also shown as 11 12 7 573 439.

Why it belongs on your N55

• Authentic BMW component for precise fit on N55B30 engines
• Prevents oil contamination in the ignition coil wells to reduce misfires
• Direct-fit replacement with no modifications required
• Keeps performance consistent and helps protect coil packs and spark plugs
• Used in our own workshop builds with excellent long-term results and happy customer feedback

Engine and model coverage

Suits vehicles powered by the BMW N55 3.0 turbo petrol, including:

• 1 Series E82 and E88 - 135i
• 3 Series E90, E91, E92, E93 - 335i and 335i xDrive
• 5 Series F07 GT, F10, F11 - 535i and 535i xDrive
• 6 Series F12 - 640i
• X models - F25 X3 35i, E70 LCI X5 35i, E71 X6 35i

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Fitting and support

Professional installation recommended. MJ Modifications offer expert fitting at our Warwickshire workshop. For a fitting quote or to book, email info@mjmodifications.co.uk.

Compatibility check before dispatch

We confirm fitment before shipping. Add your UK registration or the last 7 of your VIN at checkout so we can verify this plug tube seal is correct for your specific N55.

Warranty

Two years manufacturer warranty for UK customers and one year for international customers when a VIN is provided at checkout on compatible vehicles.

Trusted by enthusiasts

We install these genuine BMW plug tube seals daily. Customers report leaks eliminated, smoother idle and restored reliability on tuned and stock N55 cars alike.