Change Car Accessory Belt Kit BMW 3-Series

Change Car Accessory Belt Kit

Easy 0h30–7h00 ~50–700£
Estimated time 0h30–7h00
Estimated labour cost ~50–700£
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 15
  • 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)
  • 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 26
  • 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, -td Diesel (M47D20TU)
  • 318i, -Ci, -LPG LPG,Petrol (M43B19TU)
  • 318i, -ti, -Ci, -LPG LPG,Petrol (N42B20)
  • 318i, -ti, -Ci, -LPG LPG,Petrol (N46B20)
  • 320d Diesel (M47D20)
  • 320d, -Cd Diesel (M47D20TU)
  • 320d, -td, -Cd Diesel (M47D20TU)
  • 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)
  • 330d, -xd Diesel (M57D30)
  • 330d, -xd, -Cd Diesel (M57D30TU)
  • 330i, -xi, -Ci, -LPG LPG,Petrol (M54B30)
  • M3 CSL Petrol (S54B32)
  • M3, -LPG LPG,Petrol (S54B32)
3-Series 2005-2013 44
  • 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 Diesel (N47D20A)
  • 320d Diesel (N47D20C)
  • 320d EfficientDynamics Diesel (N47D20C)
  • 320d, -Xd Diesel (N47D20C)
  • 320d, -Xd M Performance Diesel (N47D20C)
  • 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)
  • 325d Diesel (M57D30T2)
  • 325d Diesel (N57D30A)
  • 325i Petrol (N53B30A)
  • 325i, -Xi Petrol (N52B25A)
  • 325i, -Xi Petrol (N53B30A)
  • 325i, -Xi, -LPG LPG,Petrol (N52B25A)
  • 328i, -Xi Petrol (N51B30A)
  • 330d Diesel (M57D30T2)
  • 330d, -xd Diesel (M57D30T2)
  • 330d, -xd Diesel (N57D30A)
  • 330i, -Xi Petrol (N52B30A)
  • 330i, -Xi Petrol (N52B30A)
  • 330i, -Xi Petrol (N53B30A)
  • 335d Diesel (M57D30T2)
  • 335d Diesel (M57D30T2)
  • 335i, -Xi Petrol (N54B30A)
  • 335i, -Xi Petrol (N55B30A)
  • 335is Petrol (N54B30A)
  • M3 GTS/CRT Petrol (S65B44A)
  • M3 Petrol (S65B40A)
3-Series 2011-2020 35
  • 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, -xDrive Diesel (B47D20A)
  • 320d, -xDrive Diesel (N47D20C)
  • 320d, -xDrive M Performance Diesel (B47D20A)
  • 320d, -xDrive M Performance Diesel (N47D20C)
  • 320i EfficientDynamics, -LPG LPG,Petrol (N13B16A)
  • 320i Petrol (B48B20A)
  • 320i, -xDrive Petrol (B48B20A)
  • 320i, -xDrive, -LPG LPG,Petrol (N20B20B)
  • 325d Diesel (B47D20B)
  • 325d Diesel (B47D20B)
  • 325d Diesel (N47D20D)
  • 328i Petrol (N26B20A)
  • 328i, -xDrive Petrol (N20B20A)
  • 330d, -xDrive Diesel (N57D30A)
  • 330d, -xDrive M Performance Diesel (N57D30A)
  • 330e PHEV Electricity,Petrol (B48B20A+GC1)
  • 330i, -xDrive Petrol (B48B20B)
  • 335d xDrive Diesel (N57D30B)
  • 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 21
  • 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 (B48B20A+GC1)
  • 320i Petrol (B48B16A)
  • 320i, -xDrive Petrol (B48B20A)
  • 320i, -xDrive Petrol (B48B20B)
  • 330d mHev, -xDrive 48V (MHEV),Diesel (B57D30B+JA1)
  • 330d, -xDrive Diesel (B57D30A)
  • 330e, -xDrive Electricity,Petrol (B48B20A+GC1)
  • 330e, -xDrive Electricity,Petrol (B48B20B+GC1)
  • 330i, -xDrive Petrol (B48B20B)
  • M3 Competition, -xDrive Petrol (S58B30A)
  • M3 Petrol (S58B30B)
  • M340d mHev xDrive 48V (MHEV),Diesel (B57D30B+JA1)
  • M340i mHev, -xDrive 48V (MHEV),Petrol (B58B30B+JA1)
  • M340i, -xDrive Petrol (B58B30B)
Renew the air-conditioning compressor drive belt 0h30–7h00
Renew the ancillary drive belt 0h30–7h00
Renew the engine oil and filter 0h30–0h45
Renew the air-conditioning compressor drive belt ( - 08/1987) 0h30–1h00
Renew the air-conditioning compressor drive belt (09/1987 - ) 0h30–0h45
Renew the ancillary drive belt (09/1987 - ) 0h30
Renew the ancillary drive belt ( - 08/1987) 0h30
Renew the ancillary drive belt Without air conditioning 0h30
Renew the ancillary drive belt With air conditioning 0h30
Renew the air-conditioning compressor drive belt (09/1993 - ) 0h30
Renew the air-conditioning compressor drive belt ( - 08/1993) 0h45

What is a BMW 3-Series accessory belt?

The accessory belt (also called the auxiliary belt or serpentine belt) allows the engine to drive peripheral components such as the alternator, air conditioning compressor, power steering pump, and sometimes the water pump.

When should you change the BMW 3-Series accessory belt?

Typical replacement is every 60,000–120,000 km or 4–6 years. Signs of wear include: squealing noise (especially at start-up or in wet weather), visible cracks or fraying. Always replace the tensioner and any idler pulleys at the same time.

Is it difficult to change the BMW 3-Series accessory belt?

Difficulty level 2/5: technically easy. Key steps: note the belt routing before removal, release the automatic tensioner, slide off the old belt, replace tensioner and idler pulleys, route the new belt, release the tensioner to apply tension.

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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Change Car Clutch

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Technical 4h00–11h00
Change Car Front Brake Discs and Pads

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Easy 1h30–17h00
Change Car Front Brake Pads

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Easy 0h45–12h00
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Easy 0h30–1h30
Change Car Glow Plugs

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Intermediate 0h45–7h00
Change Car Handbrake Cable

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Very easy 0h30–0h30
Change Car Oil Filter

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Easy 0h30–10h00
Change Car Particulate Filter (DPF)

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Easy 0h30–2h00
Change Car Rear Silencer

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Easy 0h45–2h30
Change Car Shock Absorbers

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Easy 2h30–8h00
Change Car Spark Plugs

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Easy 0h30–4h00
Change Car Timing Belt Kit

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Very technical 3h30–4h00
Change Car Turbo

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Very technical 2h30–31h00
Change Car Water Pump

Change Car Water Pump

Easy 0h30–9h00
View the service schedule for your 3-Series →