EGR valve and intake soot build-up
usually 80,000–180,000 km · Medium risk
Signs: Power loss, rough idle, limp mode or EGR fault codes; worse with short city trips
Fix: Clean or replace the EGR valve and clean the intake
€300–700
Faults and service for this model with this engine
BMW 1 Series (F40) 1.5d 3-cyl (BMW / MINI B37)
Diesel · 2019–2024
4
known faults
2
Faults typical of this model
18.0 %
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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 1.5d 3-cyl (BMW / MINI B37) engine
The 1.5d 3-cyl (BMW / MINI B37) engine was fitted to the BMW 1 Series (F40) (2019–2024). In the EU that is 18.0 % of all new cars of this generation.
Versions: 1.5 116 hp.
The most expensive known risk is timing chain stretch at high mileage (rear-mounted, rare): it usually appears at 180,000–300,000 km and costs €1,500–3,500 to fix.
Engine faults ✓ Checked against sources (10/2026)
✓ 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.
DPF clogging on short-trip cars
usually 100,000–220,000 km · Medium risk
Signs: DPF warning, frequent or failed regenerations, power loss or limp mode
Fix: Check the differential pressure sensor first, then forced regeneration, cleaning or replacement
€150–1,500
Timing chain stretch at high mileage (rear-mounted, rare)
usually 180,000–300,000 km · High risk
Signs: Metallic rattle from the gearbox end of the engine, mostly at cold start
Fix: Check chain stretch at the first noise; replace chain, guides and tensioner (engine or gearbox must come out); keep oil intervals short
€1,500–3,500
Engine mounts wear out (3-cylinder vibration)
usually 100,000–200,000 km · Wear part
Signs: Strong vibration at idle through the steering wheel and pedals, knock when pulling away
Fix: Replace the worn engine / gearbox mounts
€250–600
Faults typical of this model
Front control arm bushes
usually 80,000–160,000 km · Wear part
Signs: Shimmy under braking
Fix: Replace bushes / arms
€250–600
Run-flat tyres (harsh, expensive)
usually 0–300,000 km · Wear part
Signs: Harsh ride; expensive to replace
Fix: Budget accordingly
free / recall
Gearboxes
Manual
Clutch wear
usually 120,000–200,000 km · Medium risk
Signs: Slipping, high bite point
Fix: Replace clutch kit
€500–900
Steptronic DCT (7-speed, wet)
DCT mechatronic / solenoids
usually 120,000–220,000 km · Medium risk
Signs: Harsh shifts
Fix: Repair; keep oil changes at 60,000 km
€800–2,000
Service plan for this engine
Typical routine maintenance cost for 100,000 km: €2,400–5,750. 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 1.5d 3-cyl (BMW / MINI B37) engine. The app gives the exact plan for your mileage.
| Item | Interval | Typical price |
|---|---|---|
| DPF health check (soot / ash load)Emissions | every 20,000 km | €0–60 |
| 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 |
| Fuel filterFuel | every 30,000 km or every 24 months | €40–110 |
| Glow plugsEngine | every 100,000 km | €120–300 |
| 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 |
Versions of this engine in the BMW 1 Series (F40)
| Version | Share | Years | CO₂ | Fuel use |
|---|---|---|---|---|
| 1.5 Diesel1,496 cm³ · 85 kW (116 hp) | 18.0 % | 2020–2023 | 121 g/km | 4.7 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.
Official recalls
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.
- Engine / loss of power Replace the Engine Starter Motor27/10/2025 · R/2025/405
- Engine / loss of power Rework Front End Threaded Connection (BMW)08/11/2024 · R/2024/452
- Brakes / ABS / ESP Integrated Braking System13/09/2024 · R/2024/383
- Fire risk The exhaust gas recirculation cooler may leak over time and cause thermal incident01/08/2022 · R/2022/206
- Seat belt The material quality of the screws used for seat belts and rear seats may not be to specifications.29/12/2021 · R/2021/442
- Engine / loss of power Camshaft support housing bearing caps may become loose27/07/2020 · R/2020/191
- Airbag The driver's air bag fabric could be damaged by the air bag cover during deployment27/04/2020 · R/2020/110
Common questions
What are the biggest risks of the BMW 1 Series (F40) with the 1.5d 3-cyl (BMW / MINI B37) engine?
The faults with the highest risk: timing chain stretch at high mileage (rear-mounted, rare) (180,000–300,000 km, €1,500–3,500); DPF clogging on short-trip cars (100,000–220,000 km, €150–1,500); EGR valve and intake soot build-up (80,000–180,000 km, €300–700).
Does the BMW 1 Series (F40) 1.5d 3-cyl (BMW / MINI B37) have a timing belt or a chain?
Chain.
Which oil does the BMW 1 Series (F40) 1.5d 3-cyl (BMW / MINI B37) need?
5W-30 · BMW LL-04 · ~4.2 L · every 15,000 km.
The same model with other engines
1.5 3-cyl petrol (BMW / MINI B38)2.0d (BMW B47)2.0 petrol (BMW B48)
Other models with the 1.5d 3-cyl (BMW / MINI B37) engine
BMW 1 Series (F20) 2011–2019BMW 2 Series Active Tourer (F45) 2014–2021BMW 2 Series Gran Tourer (F46) 2015–2022
Sources and notes
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