Change Car Spark Plugs BMW 1-Series

Change Car Spark Plugs

Easy 0h30–2h00 ~50–200£
Estimated time 0h30–2h00
Estimated labour cost ~50–200£
Difficulty Easy
Vehicles
1-Series 2004-2013 16
  • 116i Petrol (N43B16A)
  • 116i Petrol (N43B20A)
  • 116i, -LPG LPG,Petrol (N45B16A)
  • 118i Petrol (N43B20A)
  • 118i Petrol (N46B20B)
  • 118i, -LPG LPG,Petrol (N46B20B)
  • 120i Petrol (N43B20A)
  • 120i Petrol (N46B20B)
  • 120i, -LPG LPG,Petrol (N46B20B)
  • 125i Petrol (N52B30A)
  • 130i Petrol (N52B30A)
  • 130i Petrol (N52B30A)
  • 135i Petrol (N54B30A)
  • 135i Petrol (N55B30A)
  • 135is Petrol (N54B30A)
  • M Coupe Petrol (N54B30A)
1-Series 2011-2019 14
  • 114i Petrol (N13B16A)
  • 116i Petrol (B38B15A)
  • 116i Petrol (N13B16A)
  • 118i Petrol (B38B15A)
  • 118i Petrol (N13B16A)
  • 118i Petrol (N13B16A)
  • 120i Petrol (B48B20A)
  • 120i Petrol (N13B16A)
  • 125i M Performance Petrol (N20B20A)
  • 125i Petrol (B48B20B)
  • 125i Petrol (N20B20A)
  • M135i, -xDrive Petrol (N55B30A)
  • M135i, -xDrive Petrol (N55B30A)
  • M140i, -xDrive Petrol (B58B30A)
1-Series 2019-2025 6
  • 116i Petrol (B38A15A)
  • 118i Petrol (B38A15A)
  • 118i Petrol (B38A15F)
  • 120i Petrol (B48A20A)
  • 128ti Petrol (B48A20E)
  • M135i xDrive Petrol (B48A20E)

What is the role of BMW 1-Series spark plugs?

The spark plug generates a spark at the precise moment needed to ignite the air/fuel mixture in the combustion chamber of petrol (or LPG) engines. The engine management system controls ignition timing.

When should you change your BMW 1-Series spark plugs?

Manufacturers provide replacement recommendations; refer to your vehicle maintenance booklet. Generally replace every 60,000 km (45,000 km for severe use). Some vehicles with long-life plugs (titanium, platinum, iridium) can go 100,000–150,000 km.

How do I know if I need to change my BMW 1-Series spark plugs?

Via the EOBD system (mandatory since 2001 on petrol cars), faulty spark plugs will trigger fault codes, typically P0301–P0304 (misfire, cylinders 1–4). Symptoms include: difficulty starting, misfires, reduced engine power, increased fuel consumption.

Is it difficult to change BMW 1-Series spark plugs?

Difficulty level 2/5: technically easy but requires specific tools (spark plug wrench, torque wrench). Key points: wait for cold engine, clean plug well with compressed air before removal, never use a dropped plug, do not grease threads, hand-tighten then torque to specification.

View all compatible products →
View your 1-Series maintenance plan (keep the 1-Series token) →

3 models covered

Model Year Range Engines covered Fuel
1-Series 2004-2013 2004-2013 116d Diesel (N47D20A), 116d Diesel (N47D20C), 116i Petrol (N43B16A), 116i Petrol (N43B20A), 116i, -LPG LPG,Petrol (N45B16A), 118d Diesel (M47D20TU2), 118d Diesel (N47D20A), 118d Diesel (N47D20C), 118i Petrol (N43B20A), 118i Petrol (N46B20B), 118i, -LPG LPG,Petrol (N46B20B), 120d… Diesel, LPG, Petrol
1-Series 2011-2019 2011-2019 114d Diesel (B37D15A), 114d Diesel (N47D16A), 114i Petrol (N13B16A), 116d Diesel (B37D15A), 116d Diesel (N47D20C), 116d EfficientDynamics Diesel (B37D15A), 116d EfficientDynamics Diesel (N47D16A), 116i Petrol (B38B15A), 116i Petrol (N13B16A), 118d Diesel (B47D20A), 118d Diesel (… Diesel, Petrol
1-Series 2019-2025 2019-2025 116d Diesel (B37C15A), 116i Petrol (B38A15A), 118d Diesel (B47C20B), 118i Petrol (B38A15A), 118i Petrol (B38A15F), 120d xDrive Diesel (B47C20B), 120i Petrol (B48A20A), 128ti Petrol (B48A20E), M135i xDrive Petrol (B48A20E) Diesel, Petrol

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