BMW N55 Spark Plug OEM 12120037582 - Genuine OE Ignition Plug for N55B30 Turbo Six - Fits 1 2 3 4 5 6 7 Series & X1 X3 X4 X5 X6 (E82 E90 F30 F32 F10 F22 F25 F15) - 135i M135i 235i 335i 435i 535i 640i 740i xDrive35i - Direct Replacement

BMW N55 Ignition Plug - Original Equipment Replacement - Part No. 12120037582

Restore crisp throttle response, smooth idle and strong, consistent spark on your turbocharged straight-six. This is the factory BMW ignition plug specified for the N55 engine family, built to OE tolerances for dependable performance and longevity. If you are chasing down misfires, hesitation under load or a lumpy idle, fresh plugs are the first step to getting your car back to its best.

At MJ Modifications we run these on our own N55 cars and our customers love the results. Genuine quality, correct heat range, zero hassle fitment.

Why this OE BMW plug is the right choice for your N55

• Original BMW part for the N55B30 series engines - precise fit and factory specification
• Helps clear misfire faults, improves cold starts and restores smooth running
• Consistent spark energy for reliable power delivery on road and motorway use
• Ideal for routine ignition service, maintenance or post-remap health checks
• Proven on our workshop cars with excellent feedback from N55 owners

Tip: replace all six plugs at the same time for even combustion across all cylinders.

What you receive

• 1 x BMW OE ignition plug

Quantity required per vehicle: 6.

Fitment - N55 petrol inline-six applications

Suitable for BMW models powered by the N55 engine, including but not limited to:

1 Series

• E82, E88 135i
• F20, F21 M135i, M135ix including LCI

2 Series

• F22, F23 M235i, M235ix

3 Series

• E90, E91, E92, E93 LCI 335i, 335xi
• F30, F31, F34 335i, 335ix, ActiveHybrid 3

4 Series

• F32, F33, F36 435i, 435ix

5 Series

• F07 GT, F10, F11 535i, 535ix, ActiveHybrid 5

6 Series

• F06 Gran Coupe, F12, F13 640i, 640ix

7 Series

• F01 LCI, F02 LCI 740i, 740Li, 740Lix, Hybrid models

X Models

• X1 E84 35ix
• X3 F25 35ix
• X4 F26 35i
• X5 E70 LCI 35ix, 40ix - X5 F15 35i, 35ix
• X6 E71 35ix, 40ix - X6 F16 35i, 35ix

Part number

BMW Part No: 12120037582

Also searched as: 12120037582 BMW plug, N55 ignition plug 12120037582, OE BMW 12120037582.

Search-friendly terms

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Compatibility check

We will verify fitment prior to dispatch. Add your UK registration or the last 7 of your VIN at checkout so we can confirm this plug is correct for your specific N55 vehicle.

Warranty

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

Professional fitting

For expert installation, book with MJ Modifications in Warwickshire. Request a fitting quote at info@mjmodifications.co.uk.

Why buy from MJ Modifications

We specialise in BMW performance parts and ignition service for N55-powered models. We have installed these plugs on countless customer cars with excellent results in drivability, reliability and smooth power. Add 6 to basket for a complete set and get your N55 running perfectly.