MOT performance
Mercedes-Benz Viano MOT pass rate and common failures
Across 11,169 MOT tests of the Mercedes-Benz Viano in 2023–2024, 65.0% passed first time. Allowing for age, mileage and fuel, Mercedes-Benz Vianos failed 11% less often than comparable cars. The most common failure item was “rbt (sp): efficiency below requirements”, on 3.70% of tests.
11,169 MOT tests on 5,783 vehicles, 2023–2024 · Source: DVSA (Open Government Licence) · Analysis: 73 Auto
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| Figure | Value | Basis |
|---|---|---|
| First-time pass rate | 65.0% | ±0.9 pts (95%), n = 11,169 |
| Failures vs similar cars | 0.89× | same age, mileage and fuel = 1.00 |
| Tests with a dangerous defect | 9.9% | n = 11,169 |
| Average age at test | 13.2 years | n = 11,169 |
| Median mileage at test | 135,880 miles | n = 11,169 |
| Vehicles tested | 5,783 | 2023–2024 |
Where Mercedes-Benz Vianos fail
The share of MOT tests that failed on each area, and how that compares with cars of the same age, mileage and fuel.
| Area | Tests failed on it | vs similar cars |
|---|---|---|
| Lights, reflectors and electrical | 17.6% | -3% |
| Brakes | 11.8% | +4% |
| Suspension | 9.0% | -44% |
| Tyres | 6.6% | -15% |
| Driver's view of the road | 5.3% | -13% |
| Body, chassis and structure | 5.0% | -25% |
| Noise, emissions and leaks | 4.6% | -7% |
| Seat belts and airbags | 4.3% | +102% |
| Steering | 2.7% | -29% |
| Road wheels | 0.6% | -2% |
| Registration plates and VIN | 0.5% | -11% |
Most common failure items
| Item | Area | Share of tests |
|---|---|---|
| Rbt (sp): efficiency below requirements | Brakes | 3.70% |
| Position lamp: not working | Lights, reflectors and electrical | 3.59% |
| Side repeaters: not working | Lights, reflectors and electrical | 3.28% |
| SRS malfunction indicator lamp: warning lamp indicates a fault | Seat belts and airbags | 3.28% |
| Stop lamp: not working | Lights, reflectors and electrical | 2.56% |
| Tread depth: tread depth below requirements of 1.6mm | Tyres | 2.50% |
| Rbt (sp): efficiency less than 50% of the required value | Brakes | 2.23% |
| Condition: has ply or cords exposed | Tyres | 2.14% |
| Ball joint: ball joint excessively worn | Suspension | 1.91% |
| Washers: provides insufficient washer liquid | Driver's view of the road | 1.86% |
Most common advisories
Advisories are items the tester expects to need attention soon; they don't fail the test.
| Item | Area | Share of tests |
|---|---|---|
| Tread depth: tread depth below requirements of 1.6mm | Tyres | 18.70% |
| Rigid brake pipes: excessively corroded | Brakes | 9.83% |
| Engine oil leaks: leaking excessively from engine | Noise, emissions and leaks | 9.05% |
| Brake discs: in such a condition that it is seriously weakened | Brakes | 8.92% |
| Brake pads: less than 1.5 mm thick | Brakes | 4.80% |
Pass rate by age
| Age at test (years) | Tests | First-time pass rate | Failures vs similar cars |
|---|---|---|---|
| 7-8 | 531 | 71.8% | -2% |
| 9-10 | 2,422 | 69.9% | -11% |
| 11-12 | 2,195 | 65.7% | -11% |
| 13-15 | 2,864 | 64.0% | -15% |
| 16+ | 3,140 | 60.2% | -9% |
Pass rate by registration year
| Registered | Tests | First-time pass rate | Failures vs similar cars |
|---|---|---|---|
| 2014 | 1,347 | 71.3% | 0.89× |
| 2013 | 1,357 | 68.7% | 0.90× |
| 2012 | 1,164 | 67.9% | 0.86× |
| 2011 | 999 | 63.0% | 0.94× |
| 2010 | 904 | 66.7% | 0.80× |
| 2009 | 921 | 64.1% | 0.85× |
| 2008 | 1,020 | 62.6% | 0.86× |
| 2007 | 960 | 61.3% | 0.89× |
| 2006 | 788 | 58.4% | 0.95× |
| 2005 | 816 | 58.0% | 0.94× |
| 2004 | 573 | 63.5% | 0.84× |
Years with fewer tests are shown for completeness; only years with enough tests have their own page.
Check a specific Mercedes-Benz Viano
Enter a UK registration to see that car's own MOT history and what it is likely to cost to own. Your first check is free and shows the vehicle summary and its headline ownership cost. The category-by-category breakdown is part of a paid check.
UK number plate or 17-character VIN
About this data. These are MOT test results, not a measure of mechanical reliability: a car's MOT outcome reflects its condition on the day, which depends on how it has been maintained and driven as well as how it was built. Figures cover class 4 vehicles (cars and light vans), normal tests only (retests excluded), outcomes pass, fail and pass after rectification at the station; vehicles at least 2.5 years old at test. Tests from 2023-01-01 to 2024-12-30. “Compared with similar cars” means compared with the national rate for cars of the same age, mileage band and fuel. Contains public sector information licensed under the Open Government Licence v3.0. Makes and models are matched to 73 Auto's vehicle catalogue; tests that can't be matched are left out rather than guessed. See how the MOT figures are produced.