Change Car Spark Plugs BMW 3-Series

Change Car Spark Plugs

Easy 0h30–4h00 ~50–400£
Estimated time 0h30–4h00
Estimated labour cost ~50–400£
Difficulty Easy
Vehicles
3-Series 1982-1995 15
  • 316 Petrol (M10B18)
  • 316i Petrol (M10B18)
  • 316i Petrol (M40B16)
  • 318i Petrol (M10B18)
  • 318i Petrol (M40B18)
  • 318is Petrol (M42B18)
  • 320i Petrol (M20B20)
  • 320i Petrol (M20B20)
  • 320is Petrol (S14B20)
  • 323i Petrol (M20B23)
  • 323i Petrol (M20B23)
  • 325e Petrol (M20B27)
  • 325i, -ix Petrol (M20B25)
  • M3 Petrol (S14B23)
  • M3 Petrol (S14B23)
3-Series 1990-2000 14
  • 316i (73/75 kW) Petrol (M40B16)
  • 316i, -LPG LPG,Petrol (M43B16)
  • 318i (83/85 kW) Petrol (M40B18)
  • 318i, -LPG LPG,Petrol (M43B18)
  • 318is Petrol (M42B18)
  • 318is, -LPG LPG,Petrol (M44B19)
  • 320i Petrol (M50B20)
  • 320i, -LPG LPG,Petrol (M52B20)
  • 323i Petrol (M52B25)
  • 323ti, -LPG LPG,Petrol (M52B25TU)
  • 325i Petrol (M50B25)
  • 328i, -LPG LPG,Petrol (M52B28)
  • M3 GT Petrol (S50B30)
  • M3 Petrol (S50B30)
3-Series 1998-2007 19
  • 316 Ci Petrol (M43B16TU)
  • 316i, -Ci, -LPG LPG,Petrol (M43B19TU)
  • 316i, -ti, -Ci Petrol (N40B16)
  • 316i, -ti, -Ci Petrol (N45B16)
  • 316i, -ti, -LPG LPG,Petrol (N42B18A)
  • 316i, -ti, -LPG LPG,Petrol (N46B18A)
  • 316ti Petrol (N40B16)
  • 318 Ci Petrol (N46B20)
  • 318i, -Ci, -LPG LPG,Petrol (M43B19TU)
  • 318i, -ti, -Ci, -LPG LPG,Petrol (N42B20)
  • 318i, -ti, -Ci, -LPG LPG,Petrol (N46B20)
  • 320i, -Ci, -LPG LPG,Petrol (M52B20TU)
  • 320i, -Ci, -LPG LPG,Petrol (M54B22)
  • 323i, -Ci, -LPG LPG,Petrol (M52B25TU)
  • 325i, -xi, -ti, -Ci, -LPG LPG,Petrol (M54B25)
  • 328i, -Ci, -LPG LPG,Petrol (M52B28TU)
  • 330i, -xi, -Ci, -LPG LPG,Petrol (M54B30)
  • M3 CSL Petrol (S54B32)
  • M3, -LPG LPG,Petrol (S54B32)
3-Series 2005-2013 26
  • 316i Petrol (N43B16A)
  • 316i Petrol (N45B16A)
  • 318i Petrol (N43B20A)
  • 318i Petrol (N43B20A)
  • 318i, -LPG LPG,Petrol (N46B20B)
  • 320i Petrol (N43B20A)
  • 320i Petrol (N46B20B)
  • 320i, -LPG LPG,Petrol (N43B20A)
  • 320i, -LPG LPG,Petrol (N46B20B)
  • 320Si, -LPG LPG,Petrol (N45B20A)
  • 323i Petrol (N52B25A)
  • 323i Petrol (N52B25A)
  • 323i Petrol (N52B25A)
  • 325i Petrol (N53B30A)
  • 325i, -Xi Petrol (N52B25A)
  • 325i, -Xi Petrol (N53B30A)
  • 325i, -Xi, -LPG LPG,Petrol (N52B25A)
  • 328i, -Xi Petrol (N51B30A)
  • 330i, -Xi Petrol (N52B30A)
  • 330i, -Xi Petrol (N52B30A)
  • 330i, -Xi Petrol (N53B30A)
  • 335i, -Xi Petrol (N54B30A)
  • 335i, -Xi Petrol (N55B30A)
  • 335is Petrol (N54B30A)
  • M3 GTS/CRT Petrol (S65B44A)
  • M3 Petrol (S65B40A)
3-Series 2011-2020 18
  • 316i Petrol (N13B16A)
  • 318i Petrol (B38B15A)
  • 320i EfficientDynamics, -LPG LPG,Petrol (N13B16A)
  • 320i Petrol (B48B20A)
  • 320i, -xDrive Petrol (B48B20A)
  • 320i, -xDrive, -LPG LPG,Petrol (N20B20B)
  • 328i Petrol (N26B20A)
  • 328i, -xDrive Petrol (N20B20A)
  • 330e PHEV Electricity,Petrol (B48B20A+GC1)
  • 330i, -xDrive Petrol (B48B20B)
  • 335i, -xDrive M Performance Petrol (N55B30A)
  • 335i, -xDrive M Performance Petrol (N55B30A)
  • 335i, -xDrive Petrol (N55B30A)
  • 340i, -xDrive M Performance Petrol (B58B30A)
  • 340i, -xDrive Petrol (B58B30A)
  • Active Hybrid 3 Electricity,Petrol (N55B30A)
  • M3 Petrol (S55B30A)
  • M3 Petrol (S55B30A)
3-Series 2019-2025 11
  • 318i Petrol (B48B20A)
  • 320e, -xDrive Electricity,Petrol (B48B20A+GC1)
  • 320i Petrol (B48B16A)
  • 320i, -xDrive Petrol (B48B20A)
  • 320i, -xDrive Petrol (B48B20B)
  • 330e, -xDrive Electricity,Petrol (B48B20A+GC1)
  • 330e, -xDrive Electricity,Petrol (B48B20B+GC1)
  • 330i, -xDrive Petrol (B48B20B)
  • M3 Competition, -xDrive Petrol (S58B30A)
  • M3 Petrol (S58B30B)
  • M340i, -xDrive Petrol (B58B30B)

What is the role of BMW 3-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 3-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 3-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 3-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 3-Series maintenance plan (keep the 3-Series token) →

7 models covered

Model Year Range Engines covered Fuel
3-Series 1975-1983 1975-1983 315 Petrol (M10B16), 316 Petrol (M10B16), 316 Petrol (M10B18), 318i Petrol (M10B18), 320 Petrol (M10B20), 320 Petrol (M20B20), 320i Petrol (M10B20) Petrol
3-Series 1982-1995 1982-1995 316 Petrol (M10B18), 316i Petrol (M10B18), 316i Petrol (M40B16), 318i Petrol (M10B18), 318i Petrol (M40B18), 318is Petrol (M42B18), 320i Petrol (M20B20), 320i Petrol (M20B20), 320is Petrol (S14B20), 323i Petrol (M20B23), 323i Petrol (M20B23), 325e Petrol (M20B27), 325i, -ix Petr… Petrol
3-Series 1990-2000 1990-2000 316g (65/75 kW) CNG,Petrol (M43B16), 316i (73/75 kW) Petrol (M40B16), 316i, -LPG LPG,Petrol (M43B16), 318i (83/85 kW) Petrol (M40B18), 318i, -LPG LPG,Petrol (M43B18), 318is Petrol (M42B18), 318is, -LPG LPG,Petrol (M44B19), 320i Petrol (M50B20), 320i, -LPG LPG,Petrol (M52B20), 32… CNG, LPG, Petrol
3-Series 1998-2007 1998-2007 316 Ci Petrol (M43B16TU), 316i, -Ci, -LPG LPG,Petrol (M43B19TU), 316i, -ti, -Ci Petrol (N40B16), 316i, -ti, -Ci Petrol (N45B16), 316i, -ti, -LPG LPG,Petrol (N42B18A), 316i, -ti, -LPG LPG,Petrol (N46B18A), 316ti Petrol (N40B16), 318 Ci Petrol (N46B20), 318d Diesel (M47D20), 318d,… Diesel, LPG, Petrol
3-Series 2005-2013 2005-2013 316d Diesel (N47D20C), 316i Petrol (N43B16A), 316i Petrol (N45B16A), 318d Diesel (M47D20TU2uL), 318d Diesel (N47D20A), 318d Diesel (N47D20C), 318i Petrol (N43B20A), 318i Petrol (N43B20A), 318i, -LPG LPG,Petrol (N46B20B), 320d Diesel (M47D20TU2OL), 320d Diesel (N47D20A), 320d Die… Diesel, LPG, Petrol
3-Series 2011-2020 2011-2020 316d Diesel (B47D20A), 316d Diesel (N47D20C), 316i Petrol (N13B16A), 318d, -xDrive Diesel (B47D20A), 318d, -xDrive Diesel (B47D20A), 318d, -xDrive Diesel (N47D20C), 318i Petrol (B38B15A), 320d EfficientDynamics Diesel (B47D20A), 320d EfficientDynamics Diesel (N47D20C), 320d, -xD… Diesel, Electricity, LPG, Petrol
3-Series 2019-2025 2019-2025 316d Diesel (B47D20B), 316d mHev 48V (MHEV),Diesel (B47D20B+JA1), 318d Diesel (B47D20B), 318d mHev 48V (MHEV),Diesel (B47D20B+JA1), 318i Petrol (B48B20A), 320d mHev, -xDrive 48V (MHEV),Diesel (B47D20B+JA1), 320d, -xDrive Diesel (B47D20B), 320e, -xDrive Electricity,Petrol (B48B20… 48V (MHEV), Diesel, Electricity, Petrol

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View the service schedule for your 3-Series →