M54B25 engine
The M54B25 engine is fitted to 2 generation(s): BMW 5 Series, BMW X3.
Common problems and what to check
Engine: BMW M52/M54 (2.0–3.0)
- oil consumption (rings)
- crankcase ventilation system failure
- cracked expansion tank and thermostat
What to check when buying: oil consumption; cooling system condition.
Tip: Refresh the cooling system preventively.