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
- Typical repair
- DPF forced regen or replacement · £250–£1,600
Is the 2014–2025 BMW 4 Series reliable?
Scored from 8 documented faults · reviewed by the VehicleFaults Research Team
Quick answer
3.4/ 10
Buy with cautionOn our documented-fault scoring the BMW 4 Series rates 3.4 out of 10 · buy with caution. We hold 8 known faults for it and 4 are rated high severity, so the risk is real but contained. The weak points cluster around exhaust, body and suspension. A well-serviced example with evidence for the big-ticket items is usually a safe buy; the score describes the model, not the specific car in front of you.
Verdict · Walk unless the history is spotless
What the score is built from
- Critical
- 0
- High
- 4
- Medium
- 4
- Low
- 0
Weak points cluster around exhaust, body, suspension, electrical.
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Check this carThe faults that decide it
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
- Typical repair
- Water-ingress trace & seal · £150–£800
Engine / LubricationHigh
Oil leaking from the oil filter housing gasket (OFHG), which can drip onto the auxiliary belt and cause catastrophic engine failure if ingested.
- Typically appears
- 60,000-80,000 miles
- What to inspect
- Run a clean white tissue under the lip of the oil filter housing. Inspect the serpentine belt for any signs of oil contamination or fraying.
- Typical repair
- Oil leak trace & seal / gasket · £180–£700
Drivetrain / xDriveHigh
Hesitation, shunting, or juddering under moderate acceleration or cornering due to transfer case wear.
- Typically appears
- 50,000-90,000 miles
- What to inspect
- Perform a tight figure-of-eight manoeuvre at low speed on full lock. Feel for any skipping, binding, or juddering through the seat and steering wheel.
- Typical repair
- Driveline / differential repair · £450–£1,800
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
- Typical repair
- Suspension refresh (per axle) · £250–£1,100
Costs are indicative UK independent-garage bands for budgeting and negotiation · never a quote.
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