Ford B Max MOT Failures

An analysis of 731,677 real DVSA MOT tests on the Ford B Max — what fails, how often, and how that compares to every other car on UK roads. Generations covered: Mk1 (2012–2017).

Where the Ford B Max fails its MOT

The single biggest MOT failure point on the Ford B Max is seat mounting fault — this model is 13 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 731,677 MOT tests, 0.36% of all Ford B Max tests recorded this as a failure.

Other notable weak points include emissions failure (156x the fleet average), coil springs broken (25x the fleet average), light unit fault (25x the fleet average), and axle or kingpin wear (9.9x the fleet average). These ratios compare the Ford B Max'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 5 categories: Seatbelts & Airbags, Exhaust & Emissions, Suspension, Lights & Electrics, Tyres. If you're inspecting a Ford B Max 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 Ford B Max'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.

For the Ford B Max specifically, the DVSA data shows the most common failures at this mileage are emissions failure (149x the average) and light unit fault (25x). reversing lamp lens defective (19x) and coil springs broken (13x) also appear frequently.

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 Ford B Max specifically, the DVSA data shows the most common failures at this mileage are emissions failure (42x the average) and coil springs broken (25x). stop lamps remain on when the brakes are released (14x) and seat mounting fault (11x) also appear frequently.

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.

For the Ford B Max specifically, the DVSA data shows the most common failures at this mileage are emissions failure (24x the average) and seat mounting fault (12x). tyre wear or damage (9.9x) and light unit fault (6.5x) also appear frequently.

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 Ford B Max specialists and owners flag most frequently, drawn from manufacturer technical bulletins, workshop data, and verified owner reports.

Coil spring fracture (Mk1) Dangerous

The B-Max suffers from premature coil spring fracture at rates significantly above the national fleet average. Affects Mk1; typical independent garage repair cost is £200–£350.

Suspension component wear (Mk1) Major

The B-Max shows accelerated wear in suspension bushes, joints, and pins compared to the national fleet average. Affects Mk1; typical independent garage repair cost is £150–£300.

Diesel particulate filter blockage (Mk1) Major

The problem affects cars from very low mileage and worsens with age. Affects Mk1; typical independent garage repair cost is £200–£400.

EcoBoost engine management system faults (Mk1) Major

MOT data shows the 1.0 EcoBoost engine has malfunction indicator lamp (MIL) failures at The complex three-cylinder turbo engine relies heavily on electronic management systems that can develop faults with age, particularly relating to turbocharger control, emissions sensors, and fuel injection timing. Affects Mk1; typical independent garage repair cost is £100–£300.

For the complete picture — including repair costs across independent, specialist, and dealer garages — see the full Ford B Max common problems breakdown.

What to check before buying a Ford B Max

Based on the MOT failure data and known issues above, here's what to prioritise when inspecting a Ford B Max:

Seatbelts & Airbags — check for seat mounting fault. Exhaust & Emissions — check for emissions failure. Suspension — check for coil springs broken, axle or kingpin wear. Lights & Electrics — check for light unit fault, stop lamps remain on when the brakes are released, reversing lamp lens defective.

Beyond the MOT items, ask specifically about coil spring fracture and suspension component wear. These won't show up on a standard MOT but can be expensive to fix — repairs start from £200. 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.