BMW 4-Series Maintenance Plans

This BMW 4-Series maintenance plan overview covers the 2013-2020 and 2020-2025 ranges, spanning a wide mix of petrol, diesel and 48V mild-hybrid powertrains. Select your exact model year and engine to see the correct service items and timings for your specific 4-Series.

Select your BMW model below to view the online service schedule for your specific engine.

2 models covered

Model Year Range Engines covered Fuel
4-Series 2013-2020 2013-2020 418d Diesel (B47D20A), 418d Diesel (N47D20C), 418i Petrol (B38B15A), 420d Diesel (B47D20A), 420d Diesel (N47D20C), 420d, -xDrive Diesel (B47D20A), 420d, -xDrive Diesel (N47D20C), 420d, -xDrive M Performance Diesel (B47D20A), 420d, -xDrive M Performance Diesel (N47D20C), 420i, -x… Diesel, Petrol
4-Series 2020-2025 2020-2025 420d mHev, -xDrive 48V (MHEV),Diesel (B47D20B+JA1), 420d mHev, -xDrive 48V (MHEV),Diesel (B47D20B+JA1), 420i Petrol (B48B16A), 420i, xDrive Petrol (B48B20A), 430d mHev, xDrive 48V (MHEV),Diesel (B57D30B+JA1), 430i, -xDrive Petrol (B48B20B), M4 Competition, -xDrive Petrol (S58B30… 48V (MHEV), Diesel, Petrol

Servicing by engine type

Petrol BMW 4-Series maintenance (B38, B48, B58, N20, N55, S55, S58)

Petrol BMW 4-Series engines range from smaller turbo units such as B38 and B48 to six-cylinder B58/N55 and high-output M engines like S55 and S58, so service requirements can differ. As a rule, keep on top of engine oil and filter changes, and use the correct specification oil for your exact engine and model year. Turbocharged petrol engines also benefit from attention to intake and ignition items, so follow the scheduled checks for air filtration and spark plugs where applicable. Cooling-system and auxiliary drive checks are important across the range, particularly as mileage builds and under higher performance use.

Diesel BMW 4-Series maintenance (B47, B57, N47, N57)

Diesel BMW 4-Series models include four-cylinder families such as N47/B47 and six-cylinder N57/B57, each with their own service nuances. Diesel servicing typically places extra emphasis on clean fuel delivery and emissions-system health, so stick closely to the correct fuel filter and air filter intervals for your engine. Many diesel variants use aftertreatment such as a DPF, where repeated short journeys can increase soot loading, making correct oil specification and scheduled inspections especially important. If your car is used for towing or frequent motorway driving, expect wear items and fluid checks to follow the more demanding end of the schedule.

48V (MHEV) BMW 4-Series maintenance (B47/B57/B58 with 48V system)

2020-2025 BMW 4-Series mild-hybrids pair engines such as B47, B57 and B58 with a 48V electrical system, so maintenance needs span both conventional servicing and high-voltage-adjacent safety considerations. Routine items like oil, filters, brakes and coolant remain central, but always follow the specified procedures when working around 48V components, wiring and the battery management system. Stop-start and regenerative features can change brake wear patterns, so regular inspection of pads, discs and brake fluid condition is worthwhile even if mileage is low. For any warning messages relating to charging or electrical supply, prioritise a scan and targeted testing rather than parts-swapping.

Common service operations for BMW

The operations listed below reflect typical BMW 4-Series servicing tasks, but the exact cadence can vary by generation, engine family and usage. Always match the schedule to your selected vehicle details before planning parts and labour.

Operation Typical interval Notes
Oil and filter changeSee selector aboveVaries by engine and recommended oil grade
Air filter30,000 to 60,000 kmMore often in urban or dusty driving
Cabin filter15,000 to 30,000 km or 1 yearAffects air conditioning and air quality
Brake fluid2 years (all models)Regardless of mileage
CoolantPer manufacturer (typically 5 years or 100,000 km)Check level and condition (colour, deposits) at every service
Front brake padsDepending on use (typically 30,000 to 60,000 km)Wear depends on driving style and load carried
Timing beltSee selector aboveInterval varies widely by engine
Spark plugs (petrol)30,000 to 60,000 kmPetrol engines only

BMW electronic diagnostics

If you are chasing a warning light, rough running or an emissions message, it helps to read the OBD system first, then service what the data points to. Use our BMW 4-Series OBD fault codes page to identify common powertrain (P), chassis (C), body (B) and network (U) code groups. Codes do not always mean a failed part: they often indicate a system out of range, wiring issue or a condition created by overdue maintenance. After repairs, confirm with a road test and re-scan.

What the BMW manual covers

A maintenance plan is most useful when you can turn it into the right workshop steps for your BMW 4-Series. A Haynes manual or model-specific guidance helps you carry out service operations correctly, with methods for access, fluid capacities, tightening torques and component locations. Because the 4-Series spans multiple generations and engines, procedures can differ between, for example, B48 and B58 petrol variants or B47 and B57 diesels. Use the schedule here to decide what needs doing, then follow the correct procedure for your exact model to avoid mistakes and repeat work.

BMW manual