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BMW

Genuine Bosch Spark Plug for BMW N54 - OEM 12120037244 (1M, 135i, 335i/335xi/335is, 535i/535xi, Z4 35i/35is, 740i/740Li, X6 35iX)

Genuine Bosch Spark Plug for BMW N54 - OEM 12120037244 (1M, 135i, 335i/335xi/335is, 535i/535xi, Z4 35i/35is, 740i/740Li, X6 35iX)

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Heads-up on cancellations & returns: if you cancel an order or return an item, you won't get back 100% of what you paid. We apply a 10% restocking fee, the outbound shipping is non-refundable, and we have to pass on Shopify / PayPal payment processing fees; these aren't returned to us when we refund you. International orders also lose on exchange-rate spread in both directions. If the original packaging is damaged or missing, a reboxing charge applies. For international orders specifically, if you refuse to pay our shipping invoice or supply a prepaid label after placing the order, the same deductions apply. We're upfront about this — please be sure of your purchase before ordering.

BMW N54 ignition plugs by Bosch, OE reference 12120037244

Restore crisp, reliable spark on your twin-turbo straight-six with the factory-spec Bosch ignition plug that BMW specifies for the N54. Ideal for daily driving and remapped setups alike, these OE plugs deliver smooth idle, strong combustion under boost and confident cold starts. A direct-fit service item for E82 E88 135i and 1M, E90 E91 E92 E93 335i 335xi 335is, E60 E61 535i 535xi, E89 Z4 35i 35is, F01 F02 740i 740Li and E71 X6 35iX.

We run these on our own shop cars and feedback from customers is consistently positive, with restored response and clean pull through the rev range. If you are chasing a misfire under load, hesitation, rough idle or are due a tune-up on your turbocharged N54, fresh OE Bosch plugs are the smart first step.

Sold individually. Most N54 engines use 6 plugs. Add 6 to basket for a complete set.

Why this Bosch OE plug is the right choice

  • Original equipment quality and calibration for the N54 turbo engine
  • Stable spark under boost for stock, Stage 1 and mildly tuned cars
  • Refined drivability with smooth idle and clean cold starts
  • Direct replacement with no modifications required
  • Trusted durability for UK road conditions and spirited driving
  • Backed by Bosch manufacturing consistency and BMW specification

Vehicle applications

  • 1 Series E82 E88 135i and 1M
  • 3 Series E90 E91 E92 E93 335i 335xi 335is
  • 5 Series E60 E61 535i 535xi
  • Z4 E89 sDrive 35i and 35is
  • 7 Series F01 F02 740i and 740Li
  • X6 E71 xDrive 35iX

Part number

BMW OE: 12120037244

Fitment check

Order with confidence. Enter your UK registration or the last 7 of your VIN at checkout and we will confirm compatibility before dispatch.

Professional fitting

Want it installed by specialists We offer fitting at MJ Modifications in Warwickshire. Email info@mjmodifications.co.uk for a quote and availability.

Manufacturer

Bosch

Warranty

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

Search terms to help you find the right plug

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