65.6%
Mercedes-Benz Viano
Mercedes-Benz Viano MOT pass rate and common problems
The Mercedes-Benz Viano passed 65.6% of its initial MOT tests in 2025, 6.7 percentage points below the 72.3% UK average. The item testers recorded most often was position lamp not working.
Checking a specific car? Its own results, advisories and recorded mileages are in a free MOT history check.
How the Viano compares
Initial MOT tests in 2025, retests excluded. A car that failed and was repaired at the test station counts as a fail.
77.1%
Mercedes-Benz average
72.3%
UK average, all cars
The Viano runs 11.4 points behind the Mercedes-Benz average. It is 32nd of the 35 Mercedes-Benz models in the data. The average Viano arrived at its test 15 years old with 154,118 miles recorded.
A pass rate records whether cars met the roadworthiness standard on test day. It is not a reliability score, and part of any gap reflects how old the tested cars were.
Viano MOT pass rate by age
The same 2025 tests split by the car's age at test.
Mercedes-Benz Viano cars aged 6 to 10 years passed 70.4% of MOT tests. For cars aged 11 years and over that fell to 65.2%, a drop of 5.1 percentage points.
| Age at test | Tests | Pass rate | vs UK average |
|---|---|---|---|
| 3 to 5 years (small sample) | 5 | 40% | 32.3 pts below |
| 6 to 10 years | 425 | 70.4% | 2 pts below |
| 11 years and over | 4,573 | 65.2% | 7.1 pts below |
That is a smaller decline than most cars show. The UK average of 72.3% covers cars of every age, so compare like with like.
Where Viano failures cluster
Every failure item recorded on Mercedes-Benz Viano cars in 2025, grouped into the DVSA's test areas.
Lamps, reflectors and electrical equipment and brakes together account for 50.3% of recorded failure items. These are recorded failures across the model, not faults every car has.
The 10 most common Viano MOT failures
Specific items recorded on Mercedes-Benz Viano cars that failed their 2025 MOT, as a share of all recorded failure items.
Together these 10 items make up 29.5% of everything testers recorded against failed Mercedes-Benz Viano cars. The rest is spread across many smaller items, and one failed test often records several at once.
What to look at on a Viano
The recorded failures above, grouped by area, biggest first.
1
Lamps, reflectors and electrical equipment
Recorded most often: position lamp not working, side repeaters not working, stop lamp not working and headlamp aim too low. 12.8% of failure items.
2
Brakes
Recorded most often: rbt (sp) efficiency below requirements and rbt (sp) efficiency less than 50% of the required value. 6.3% of failure items.
3
Tyres
Recorded most often: tread depth below requirements of 1.6mm and condition has ply or cords exposed. 5.3% of failure items.
4
Seat belts and supplementary restraint systems
Recorded most often: srs malfunction indicator lamp warning lamp indicates a fault. 2.7% of failure items.
The car's own MOT history matters more than any model average. A free MOT history check shows whether a specific Viano has failed on these items before, or had them noted as advisories. Buying one? See the used Mercedes-Benz Viano buying guide.
Already found one?
Check its finance, write-off, theft, mileage and keeper history with a £15 vehicle history report.
Mercedes-Benz Viano MOT FAQs
What is the Mercedes-Benz Viano MOT pass rate?
65.6% of Mercedes-Benz Viano cars passed their initial MOT first time in 2025, from 5,004 tests. That is 6.7 percentage points below the 72.3% average for all cars, and ranks 419th of 575 models.
What does a Mercedes-Benz Viano most commonly fail its MOT on?
The item testers recorded most often on Mercedes-Benz Viano cars failing their 2025 MOT was position lamp not working, on 3.9% of failure items. Next were rbt (sp) efficiency below requirements (3.7%) and side repeaters not working (3.5%).
Which area causes the most Mercedes-Benz Viano MOT failures?
Across every recorded failure item, the largest area was lamps, reflectors and electrical equipment at 30%, followed by brakes at 20.4%.
Do older Mercedes-Benz Viano cars fail their MOT more often?
Mercedes-Benz Viano cars aged 6 to 10 years passed 70.4% of MOT tests in 2025, against 65.2% for cars aged 11 years and over.
Does this mean every Mercedes-Benz Viano has these problems?
No. These are the items testers recorded across every Mercedes-Benz Viano that failed in 2025. They show where the model most often needs attention, not the condition of any individual car.
How do I see a specific Mercedes-Benz Viano's MOT history?
Enter its registration on the free Carpeep MOT history check to see that car's own test results, failures, advisories and recorded mileages.
MOT figures are aggregated from the DVSA MOT Anonymised data set for 2025: class 4 initial tests, retests excluded, with failure items from failed tests (advisories and minor defects excluded), licensed under the Open Government Licence v3.0. MOT results describe roadworthiness at test, not mechanical reliability.