Mercedes Benz Vito MOT Failures
An analysis of 435,389 real DVSA MOT tests on the Mercedes Benz Vito — what fails, how often, and how that compares to every other car on UK roads. Generations covered: W638 (1996–2003), W639 (2003–2014), W447 (2014–2024).
Where the Mercedes Benz Vito fails its MOT
The single biggest MOT failure point on the Mercedes Benz Vito is light unit fault — this model is 263 times more likely to fail on this item than the average car on UK roads. That makes it an extreme outlier for anyone buying or owning this model. Across 435,389 MOT tests, 7.48% of all Mercedes Benz Vito tests recorded this as a failure.
Lighting faults are usually straightforward to fix (bulbs, connectors, earth points) but can indicate deeper wiring issues on older cars. Check all lights including fog lamps, number plate lights, and dashboard warning lights.
Other notable weak points include structural corrosion (64x the fleet average), abs fault (56x the fleet average), power steering fault (92x the fleet average), and tyre load capacity or speed rating not in accor... (65x the fleet average). These ratios compare the Mercedes Benz Vito'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 6 categories: Lights & Electrics, Bodywork, Suspension, Steering, Tyres and others. If you're inspecting a Mercedes Benz Vito 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 Mercedes Benz Vito'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 Mercedes Benz Vito specifically, the DVSA data shows the most common failures at this mileage are towbar fault (415x the average) and sharp bodywork damage (166x). brake fluid warning light illuminated or defective (115x) and emissions failure (93x) 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 Mercedes Benz Vito specifically, the DVSA data shows the most common failures at this mileage are tyre load capacity or speed rating not in accor... (65x the average) and abs fault (55x). tyre load capacity load capacity insufficient f... (40x) and structural corrosion (32x) 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 Mercedes Benz Vito specifically, the DVSA data shows the most common failures at this mileage are structural corrosion (64x the average) and load sensing valve seized or inoperative and ab... (61x). wheel damage (52x) and tyre load capacity or speed rating not in accor... (37x) also appear frequently.
The shift from towbar fault at lower mileages to structural corrosion 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 Mercedes Benz Vito specialists and owners flag most frequently, drawn from manufacturer technical bulletins, workshop data, and verified owner reports.
Subframe and suspension mounting point corrosion Dangerous
The Vito suffers from severe structural corrosion around subframe and suspension component mounting points, particularly affecting the load-bearing structure within 30cm of mounting brackets. Affects W639, W447; typical independent garage repair cost is £1,500–£4,000.
Brake hose deterioration Dangerous
Flexible brake hoses show excessive deterioration rates on the Vito, failing at 53.9 times the fleet average according to MOT data. Affects W639, W447; typical independent garage repair cost is £200–£400.
General body structure corrosion Major
Widespread body corrosion affects the Vito's structural rigidity, with MOT data showing failure rates 80 times the fleet average for vehicle structure corroded to the extent that rigidity is seriously reduced. Affects W639, W447; typical independent garage repair cost is £800–£2,500.
Excessive exhaust smoke emission (W447) Major
Third-generation Vito diesel models show excessive exhaust smoke at rates 92.6 times the fleet average, primarily affecting newer vehicles with DPF-equipped engines. Affects W447; typical independent garage repair cost is £500–£2,500.
For the complete picture — including repair costs across independent, specialist, and dealer garages — see the full Mercedes Benz Vito common problems breakdown.
What to check before buying a Mercedes Benz Vito
Based on the MOT failure data and known issues above, here's what to prioritise when inspecting a Mercedes Benz Vito:
Lights & Electrics — check for light unit fault, headlight fault. Bodywork — check for structural corrosion, towbar fault. Suspension — check for abs fault. Steering — check for power steering fault.
Beyond the MOT items, ask specifically about subframe and suspension mounting point corrosion and brake hose deterioration. These won't show up on a standard MOT but can be expensive to fix — repairs start from £1,500. 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 Mercedes Benz Vito?
Enter the reg to see its full MOT history, mileage records, write-off status, and finance checks.
Mercedes Benz Vito MOT FAQs
What are the most common MOT failures on a Mercedes Benz Vito?
Based on 435,389 DVSA MOT tests, the most common failure is light unit fault — at 263x the national fleet average. Other frequent failures include structural corrosion and abs fault.
Is the Mercedes Benz Vito reliable based on MOT data?
The Mercedes Benz Vito has 27 MOT failure categories above the fleet average. Specialists also flag subframe and suspension mounting point corrosion 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 Mercedes Benz Vito most commonly fails on structural corrosion and load sensing valve seized or inoperative and ab.... Under 60,000 miles, the main issues are towbar fault and sharp bodywork damage.
How do I check a Mercedes Benz Vito'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.