BMW 3 Series G20/G21/G28 M340i (Petrol)
Model overview
A modern 3 Series with responsive handling and extensive technology. Engine and equipment choices determine much of the upkeep.
Pros
- Responsive handling
- Modern cabin
- Good motorway refinement
Cons
- Complex electronics
- Premium repair costs
- Costly optional equipment
Common problems & ownership concerns
Potential impact: Low · Medium · High. This describes possible consequences, not fault likelihood.
- Electrical and sensor faultsMedium
- Cooling-system leaks on applicable versionsMedium
- Suspension wearMedium
Maintenance
Follow the exact engine and transmission schedule and applicable software updates.
Engine overview · 3.0L 6-cyl PETROL
A smooth turbocharged petrol six-cylinder with strong performance. Cooling and turbo repairs can make upkeep substantial.
Pros
- Strong performance
- Broad torque delivery
- Smooth six-cylinder response
Cons
- Premium servicing costs
- Turbocharging complexity
- Cooling-system upkeep
Common problems & ownership concerns
Potential impact: Low · Medium · High. This describes possible consequences, not fault likelihood.
- Cooling-system faultsMedium
- Turbocharging faultsMedium
- Oil leaksMedium
Maintenance
Use the engine-specific service schedule and approved oil specification.
These are general ownership concerns, not a diagnosis. Equipment and engine details vary by version and production date.
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