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
2014–2025 BMW 4 Series · common problems & known faults
A style-led coupe, convertible and Gran Coupe range. Cosmetic condition matters as much as mechanical health here.
Compiled & reviewed by the VehicleFaults Research Team · last reviewed August 2026
Quick answer
The most commonly reported faults on the 2014–2025 BMW 4 Series are EGR cooler recall and DPF blockage on diesels, Convertible roof mechanism and hydraulic faults and Bush and drop link wear plus kerbed alloys. 2 of the documented issues are rated high severity · inspect these first. Full inspection points, onset mileage and what to check are listed below.
Reliability snapshot
Based on the documented faults on this page for the BMW 4 Series.
6.7/ 10
- Critical
- 0
- High
- 2
- Medium
- 2
- Low
- 0
Guidance only · reflects reported patterns, not a specific car's condition.
BMW 4 Series problems by year
Which faults an average example has usually reached depends on its age. Pick a model year for the faults that matter on that build.
Known faults to check
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
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
ElectricalMedium
iDrive, camera and comfort access faults
- Typically appears
- Age-related
- What to inspect
- Test iDrive, cameras and keyless entry
Inspecting a BMW 4 Series?
Generate a full, tickable pre-purchase checklist tailored to this exact vehicle · add photos and notes as you inspect. Try it free.
Check this exact carFrequently 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.
Sources & further reading
Faults are compiled from documented recalls, technical bulletins, owner reports and mechanic sources, then reviewed for accuracy. This is guidance only · not a substitute for a professional inspection.