BMW 4 Series MOT Failures

An analysis of 1,202 real DVSA MOT tests on the BMW 4 Series — what fails, how often, and how that compares to every other car on UK roads. Generations covered: F32 (2013–2020), F82 (2014–2020), G82 (2021–2024).

Where the BMW 4 Series fails its MOT

The single biggest MOT failure point on the BMW 4 Series is tyre cords visible or damaged — this model is 6.3 times more likely to fail on this item than the average car on UK roads. That makes it worth watching for anyone buying or owning this model. Across 1,202 MOT tests, 5.83% of all BMW 4 Series tests recorded this as a failure.

Tyre failures indicate either poor maintenance or suspension geometry issues causing uneven wear. Check all four tyres for tread depth, sidewall damage, and uneven wear patterns.

Other notable weak points include wheel with a loose or missing wheel nut, bolt o... (10x the fleet average) and tyre seriously damaged (5.1x the fleet average). These ratios compare the BMW 4 Series's failure rate on each item against the national average for all cars tested — a ratio of 10x means this model fails ten times more often than a typical car.

The failures span 2 categories: Tyres, Wheels. If you're inspecting a BMW 4 Series before purchase, these are the areas to focus on — and if any have been flagged as advisories on a previous MOT, they're likely to become failures in the near future.

How failures change with mileage

The BMW 4 Series's weak points shift as the car covers more miles. Understanding these patterns helps you know what to expect — and what to budget for — at each stage of ownership.

Under 60,000 miles

At this mileage, most failures are either design-related or caused by age rather than wear. Components like bushes and drop links may not have been replaced yet, and original-fit parts can deteriorate even on low-mileage cars that spend a lot of time sitting.

The standout failure at this mileage is tyre cords visible or damaged at 6.3x the fleet average.

60,000 to 100,000 miles

This is where routine wear items start to show up. Brake components, tyres, and exhaust parts have done serious work by this point. Cars that have been well serviced will show fewer of these failures — this mileage band is where good maintenance really separates the well-kept from the neglected.

For the BMW 4 Series specifically, the DVSA data shows the most common failures at this mileage are wheel with a loose or missing wheel nut, bolt o... (10x the average) and tyre cords visible or damaged (5.1x).

Over 100,000 miles

High-mileage cars accumulate failures across multiple systems. The key question isn't whether things will need doing — they will — but whether the car has been maintained well enough to keep on top of them. Look for a consistent service history and recent MOT passes with minimal advisories.

The standout failure at this mileage is tyre seriously damaged at 5.1x the fleet average.

The shift from tyre cords visible or damaged at lower mileages to tyre seriously damaged at higher mileages is typical — early failures tend to be design or factory-related, while high-mileage failures reflect accumulated mechanical wear. A car that's been well maintained will usually dodge the worst of both.

Known issues beyond the MOT

An MOT only tests roadworthiness at a single point in time — it won't catch developing faults, intermittent problems, or issues that haven't yet reached the failure threshold. These are the issues that BMW 4 Series specialists and owners flag most frequently, drawn from manufacturer technical bulletins, workshop data, and verified owner reports.

Crank hub failure (2014-2016 worst) (F82) Dangerous

The crankshaft hub bolt on S55 engines can loosen over time, allowing the timing gear to slip relative to the crankshaft position. Affects F82.

Oil consumption and rod bearing wear (F82) Major

The S55 engine consumes oil at higher rates than typical BMW engines, particularly under sustained high-RPM operation such as track driving. Affects F82.

Cooling system failures (F82) Major

The S55 cooling system is stressed by the high heat output of the twin-turbo engine and can fail in multiple ways. Affects F82; typical independent garage repair cost is £300–£800.

DCT clutch wear and overheating (F82) Major

The dual-clutch transmission (DCT) in the M4 uses two clutch packs that can wear prematurely under aggressive driving conditions. Affects F82.

For the complete picture — including repair costs across independent, specialist, and dealer garages — see the full BMW 4 Series common problems breakdown.

What to check before buying a BMW 4 Series

Based on the MOT failure data and known issues above, here's what to prioritise when inspecting a BMW 4 Series:

Tyres — check for tyre cords visible or damaged, tyre seriously damaged. Wheels — check for wheel with a loose or missing wheel nut, bolt o....

Beyond the MOT items, ask specifically about crank hub failure and oil consumption and rod bearing wear. These won't show up on a standard MOT but can be expensive to fix — A specialist pre-purchase inspection is worth the investment on this model.

Always check the car's full MOT history for patterns — recurring advisories often become failures within 12 months. And verify the service history to confirm maintenance has been kept up to schedule. Enter any reg into our free car check to see the complete picture.

MOT failure data sourced from DVSA bulk test records via data.gov.uk. Ratios compare this model's failure rate against the national fleet average. Known issues sourced from manufacturer bulletins, specialist workshops, and verified owner reports.