ExhaustHigh
EGR cooler recall and DPF blockage on diesels
- Typically appears
- 70,000+ miles
- What to inspect
- Confirm the recall against the VIN and run the car up to temperature
2018 BMW 4 Series problems
A 2018 BMW 4 Series is now 8 years old, so an average example has covered around 108,000 miles. A mid-run car · most launch faults had been addressed by this point, and wear items are the main risk at this age. Check the state safety inspection and service history alongside the documented faults below, which are sorted by whether a 2018 car has usually reached the mileage where they appear.
Compiled & reviewed by the VehicleFaults Research Team
Quick answer
The 2018 BMW 4 Series is 8 years old, so an average example has covered roughly 108,000 miles. At that mileage 2 of the documented faults are already due, so check those first.
Faults a 2018 example has usually reached
Documented onset mileage is at or below the ~108k miles an average 2018 car has covered.
SuspensionMedium
Bush and drop link wear plus kerbed alloys
- Typically appears
- 60,000+ miles
- What to inspect
- Listen for knocks and inspect all four wheels
Faults that appear at any mileage
Age, electronics and build-related issues that are not mileage-driven.
BodyHigh
Convertible roof mechanism and hydraulic faults
- Typically appears
- Any
- What to inspect
- Cycle the roof fully twice and check for damp in the boot
ElectricalMedium
iDrive, camera and comfort access faults
- Typically appears
- Age-related
- What to inspect
- Test iDrive, cameras and keyless entry
Inspecting a 2018 BMW 4 Series?
Generate a tickable pre-purchase checklist for this exact year, mileage and variant · add photos and notes as you inspect.
Check this exact carBMW 4 Series · frequently asked questions
Are convertibles worth stocking?
Seasonally yes, but only test the roof yourself. A failed mechanism destroys the profit.
What do buyers notice first?
Wheel condition. Refurbished alloys pay for themselves on this type of car.
Diesel or petrol?
Diesel Gran Coupes still sell to commuters; petrol coupes suit weekend buyers.