The engine shows moderate reliability with a risk score of 5.5 out of 10. This suggests manageable ownership with some known weak points. The single documented issue is of medium severity and can usually be addressed before it causes major damage if maintenance is kept up.
BMW B38
B38 Engine
The B38 is a petrol engine manufactured by BMW. It has a displacement of 1.5 liters. Production started in 2014 and is ongoing.
Typical Use Cases
- BMW 1 Series (F20/F40): 2015–Present
- BMW 2 Series Active Tourer (F45/F46): 2014–2021
- BMW X1 (F48): 2015–Present
- BMW i8: 2014–2020
- Mini Cooper (F55/F56): 2014–Present
This overview summarizes the reliability of the BMW B38, including common issues and cost drivers.
Technical Specifications
Manufacturer
BMW
Fuel Type
Petrol
Displacement
1.5 L
Production
2014–Present
Power Output
102 hp
Emissions
Euro 6, Euro 6d
Reliability Analysis
Conditionally Recommended
Autoscore Verdict
Conditionally Recommended. The risk score of 5.5 indicates moderate risk, mostly tied to manageable cooling system issues.
Risk Score
5.5
out of 10
Common Problems & Weak Points
| Issue | Typical Mileage | Repair Cost (Est.) | Severity |
|---|---|---|---|
| Cooling System Leaks | ~70,000 km | €300 – €600 | Medium |
Cooling System Leaks
The B38 can develop leaks around the thermostat housing or coolant hoses. This usually starts as a slow coolant loss but can lead to overheating if it goes unnoticed. The problem is moderately common and typically appears around 70,000 km. Repairs usually cost 300 to 600 EUR depending on parts replaced. Regularly checking coolant level and looking for dried coolant residue helps catch it early.
Typical Mileage: 70,000 km
Cost: €300–600
Buyer's Inspection Checklist
- Check coolant level and look for dried coolant residue around the thermostat housing and hose connections.
- Ask for service records showing any cooling system repairs or replacements.
- During a test drive, verify the engine reaches and holds operating temperature without warning lights.
- Inspect for sweet coolant smell in the engine bay, which can indicate small leaks.
Frequently Asked Questions
Is the B38 engine reliable?
The B38 has known weak points, but with good maintenance the reliability is solid. See the risk analysis and common problems for specifics. Start a report for a specific car.
How expensive are typical repairs?
Common repairs fall into a mid-range cost band depending on the issue and workshop. Check the cost ranges in the table. Use the used car report for specific listings.
Which model years are best for this engine?
Newer production years often include technical updates. Review the production years and revisions in the specs. Use Car Check for quick screening.