Petrol · 2019–2024
Enter your VIN and mileage and get a plan built for your exact engine and gearbox.
All about the BMW 1 Series (F40)All about the 1.2 / 1.5 3-cyl petrol (BMW / MINI B38) engine
The 1.5 3-cyl petrol (BMW / MINI B38) engine was fitted to the BMW 1 Series (F40) (2019–2024). In the EU that is 51.1 % of all new cars of this generation.
Versions: 1.5 136 hp, 1.5 140 hp, 1.5 109 hp.
The most expensive known risk is coolant leaks: oil filter housing, thermostat, turbo coolant lines: it usually appears at 60,000–160,000 km and costs €150–700 to fix.
✓ The faults of this engine were checked against sources (10/2026). Each item has at least two independent sources or an official recall or parts-maker technical note.
Signs: Coolant level warning, sweet smell or burning smell, coolant traces around the housing or turbo
Fix: Pressure-test the cooling system; replace the leaking housing, thermostat, hose or turbo line O-rings
Signs: Rough idle, misfire codes, slight power loss and higher fuel use
Fix: Confirm with an endoscope, then clean the intake valves (walnut blasting)
Signs: Shimmy under braking
Fix: Replace bushes / arms
Signs: Harsh ride; expensive to replace
Fix: Budget accordingly
Signs: Slipping, high bite point
Fix: Replace clutch kit
Signs: Harsh shifts
Fix: Repair; keep oil changes at 60,000 km
Typical routine maintenance cost for 100,000 km: €2,200–4,950. Sum of the services and wear parts in the plan above (about 15,000 km a year, independent workshop), without faults.
Intervals and typical prices for the BMW 1 Series (F40) with the 1.5 3-cyl petrol (BMW / MINI B38) engine. The app gives the exact plan for your mileage.
| Item | Interval | Typical price |
|---|---|---|
| Engine oil + oil filterEngine | every 15,000 km or every 12 months | €70–150 |
| Cabin (pollen) filterClimate | every 15,000 km or every 12 months | €15–40 |
| Brake fluidBrakes | every 24 months | €50–95 |
| A/C service (regas + desiccant)Climate | every 24 months | €70–150 |
| Air filterEngine | every 30,000 km or every 24 months | €15–45 |
| Spark plugsIgnition | every 60,000 km or every 48 months | €50–160 |
| Auxiliary (serpentine) beltEngine | every 120,000 km | €70–180 |
| Coolant replacementCooling | every 150,000 km or every 96 months | €70–150 |
| Timing chain inspection (listen on cold start)Engine | every 150,000 km | €0–120 |
| Manual gearbox oilTransmission | every 150,000 km | €60–130 |
| Front brake padsBrakes | usually at 30,000–60,000 km | €60–150 |
| Front brake discs + padsBrakes | usually at 60,000–120,000 km | €150–320 |
| Rear brake padsBrakes | usually at 50,000–90,000 km | €50–130 |
| Tyres (set of 4)Wheels | usually at 40,000–60,000 km | €320–700 |
| Wiper bladesBody | checked at service | €20–50 |
| 12V batteryElectrical | checked at service | €100–220 |
| Version | Share | Years | CO₂ | Fuel use |
|---|---|---|---|---|
| 1.5 Petrol1,499 cm³ · 100 kW (136 hp) | 26.1 % | 2020–2023 | 132 g/km | 5.8 L |
| 1.5 Petrol1,499 cm³ · 103 kW (140 hp) | 17.3 % | 2020–2023 | 141 g/km | 6.3 L |
| 1.5 Petrol1,499 cm³ · 80 kW (109 hp) | 7.7 % | 2020–2023 | 133 g/km | 5.8 L |
Source: European Environment Agency (EEA), monitoring of CO₂ emissions from new passenger cars, CC BY 4.0. CO₂ and fuel use are official type-approval values (WLTP from 2021), not real-world consumption.
Recalls the manufacturer published in the United Kingdom for this model (7). The same recalls usually apply across Europe. Ask an authorised dealer to check by VIN whether your car is affected and whether the work has been done.
The faults with the highest risk: coolant leaks: oil filter housing, thermostat, turbo coolant lines (60,000–160,000 km, €150–700).
Chain.
0W-20 / 5W-30 · BMW LL-17FE+ / LL-01 · ~4.25 L · every 15,000 km.
2.0d (BMW B47)1.5d 3-cyl (BMW / MINI B37)2.0 petrol (BMW B48)
BMW 1 Series (F20) 2011–2019MINI Hatch (F56) 2014–2023BMW X1 (F48) 2015–2022BMW X1 (U11) 2022–MINI Countryman (F60) 2017–2024BMW 2 Series Active Tourer (F45) 2014–2021BMW X2 (F39) 2018–2023MINI Clubman (F54) 2015–2024BMW 2 Series Active Tourer (U06) 2021–BMW 2 Series Gran Tourer (F46) 2015–2022BMW X2 (U10) 2023–BMW 1 Series (F70) 2024–
Main sources for the faults of this engine:
Faults, intervals and prices are indicative and collected from public sources and owner experience; always rely on the service book and a qualified workshop. Test statistics: DVSA – Anonymised MOT tests and results, Open Government Licence v3.0. Dutch tests: RDW Open Data (CC0). Engine versions: EEA, monitoring of CO₂ emissions from new passenger cars (CC BY 4.0, DG CLIMA). Owner complaints: NHTSA ODI (public domain). Recalls: DVSA Vehicle Safety Branch Recalls Database, OGL v3.0. Brand and model names are trademarks of their owners and are used only to describe the vehicles. How we check the data →
Updated 29/10/2026