BMW 3 Series 320d common problems and used buying checks
F30 · 2012-2019
Duewise summarises known weak points, mileage context and evidence to request before viewing this model.
Capable high-mileage diesel if maintained properly. Main checks are timing chain noise, DPF/EGR, oil history and automatic gearbox service if fitted.
Weak points
Known weak points to check
These are structured model-profile checks already present in the Duewise catalog. They are not a diagnosis of any individual car.
high risk · common from 100,000 miles
Timing chain noise / stretch
BMW four-cylinder diesels can suffer timing-chain related issues depending on engine and history.
How to check
Listen cold and warm. Ask for chain inspection/replacement evidence.
medium risk · common from 90,000 miles
DPF / EGR issues
Short trips and poor maintenance can cause diesel emissions-system issues.
How to check
Check warning lights, smoke, limp mode, DPF/EGR history and journey pattern.
Service evidence to request
essential
Oil service history
Long oil intervals increase risk on high-mileage diesels.
Ask for invoices showing regular oil changes.
Mileage-sensitive checks
Duewise does not yet have detailed mileage thresholds for this exact model. Use the checklist and request service evidence.
Viewing checklist
What to inspect before buying
Use these checks to prepare before travelling and to structure the viewing.
Before travelling
- Ask for timing chain evidence.
- Ask for DPF/EGR history.
- Ask for gearbox service if automatic.
Turn this model guide into a registration-specific buyer report.
Enter the registration, mileage and asking price. Duewise combines this model context with the details of the car you are considering.