Ford Grand C Max MOT Failures
An analysis of 222,247 real DVSA MOT tests on the Ford Grand C Max — what fails, how often, and how that compares to every other car on UK roads. Generations covered: C344 (2010–2019).
Where the Ford Grand C Max fails its MOT
The single biggest MOT failure point on the Ford Grand C Max is emissions failure — this model is 25 times more likely to fail on this item than the average car on UK roads. That makes it a significant weak point for anyone buying or owning this model. Across 222,247 MOT tests, 0.71% of all Ford Grand C Max tests recorded this as a failure.
Exhaust and emissions failures often point to catalytic converter degradation, lambda sensor faults, or — in diesel models — DPF problems. These can be expensive to fix and will cause an immediate MOT failure.
Other notable weak points include light unit fault (31x the fleet average), anti-roll bar links worn (11x the fleet average), tyre wear or damage (46x the fleet average), and any part of the noise suppression system insecure (8.8x the fleet average). These ratios compare the Ford Grand C 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: Exhaust & Emissions, Lights & Electrics, Suspension, Tyres, Wheels. If you're inspecting a Ford Grand C 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 Grand C 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 Grand C Max specifically, the DVSA data shows the most common failures at this mileage are light unit fault (31x the average) and emissions failure (25x). anti-roll bar links worn (11x) and electrical wiring fault (10x) 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 Grand C Max specifically, the DVSA data shows the most common failures at this mileage are emissions failure (16x the average) and transmission shaft constant velocity joint boot... (9.0x). tyre wear or damage (8.7x) and anti-roll bar links worn (6.8x) 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 Grand C Max specifically, the DVSA data shows the most common failures at this mileage are tyre wear or damage (7.4x the average) and anti-roll bar links worn (7.4x). wheel with a loose or missing wheel nut, bolt o... (6.5x) and light unit fault (5.7x) also appear frequently.
The shift from light unit fault at lower mileages to tyre wear or damage 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 Ford Grand C Max specialists and owners flag most frequently, drawn from manufacturer technical bulletins, workshop data, and verified owner reports.
Diesel exhaust emissions excessive (DPF/EGR related) Major
Ford Grand C-Max diesel models show exceptional rates of MOT emissions failures, particularly smoke opacity levels that exceed manufacturer limits by up to This indicates widespread diesel particulate filter (DPF) blockage and exhaust gas recirculation (EGR) valve carbon contamination across 1.5 and 1.6-litre TDCi engines. Affects C344; typical independent garage repair cost is £800–£2,000.
Suspension bush and joint premature wear
The Grand C-Max demonstrates exceptionally high rates of suspension component wear, failing MOT tests at up to 16.1 times the fleet average for worn suspension pins, bushes and joints. Affects C344; typical independent garage repair cost is £120–£400.
CV joint boot failure leading to joint wear
Diesel Grand C-Max models show elevated failure rates for CV joint boot deterioration at up to 9 times the fleet average, particularly affecting 2.0-litre TDCi variants. Affects C344; typical independent garage repair cost is £80–£300.
Engine management light and emissions control malfunction
Grand C-Max models experience engine management light illumination at up to 8.5 times the fleet average, particularly affecting 1.0 EcoBoost petrol engines. Affects C344; typical independent garage repair cost is £80–£250.
For the complete picture — including repair costs across independent, specialist, and dealer garages — see the full Ford Grand C Max common problems breakdown.
What to check before buying a Ford Grand C Max
Based on the MOT failure data and known issues above, here's what to prioritise when inspecting a Ford Grand C Max:
Exhaust & Emissions — check for emissions failure, any part of the noise suppression system insecure. Lights & Electrics — check for light unit fault, electrical wiring fault. Suspension — check for anti-roll bar links worn. Tyres — check for tyre wear or damage, tyre cords visible or damaged.
Beyond the MOT items, ask specifically about diesel exhaust emissions excessive and suspension bush and joint premature wear. These won't show up on a standard MOT but can be expensive to fix — repairs start from £800. 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.
Looking at a specific Ford Grand C Max?
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Ford Grand C Max MOT FAQs
What are the most common MOT failures on a Ford Grand C Max?
Based on 222,247 DVSA MOT tests, the most common failure is emissions failure — at 25x the national fleet average. Other frequent failures include light unit fault and anti-roll bar links worn.
Is the Ford Grand C Max reliable based on MOT data?
The Ford Grand C Max has 17 MOT failure categories above the fleet average. Specialists also flag diesel exhaust emissions excessive as a concern. A pre-purchase inspection and service history check are recommended.
What MOT failures should I expect at high mileage?
Above 100,000 miles, the Ford Grand C Max most commonly fails on tyre wear or damage and anti-roll bar links worn. Under 60,000 miles, the main issues are light unit fault and emissions failure.
How do I check a Ford Grand C Max's MOT history?
Enter the registration number into our free car check above. You'll see every MOT test result, advisories and failures, mileage readings, write-off status, and finance checks.
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.