MERCEDES-BENZ B-CLASS MOT pass rate
79.0% of 110,551 MERCEDES-BENZ B-CLASS MOT tests pass.
At 79.0%, The B-CLASS passes slightly less often than the average across all MERCEDES-BENZ models (83.5%).
The MERCEDES-BENZ B-CLASS's pass rate of 79.0% is in line with the national average for cars, at 79.2%.
Own this MERCEDES-BENZ B-CLASS?
This is the average across every MERCEDES-BENZ B-CLASS in the dataset. Look up your own registration for its actual MOT history, and a free place to keep its maintenance records.
How to check and keep your MERCEDES-BENZ’s service history →
Pass rate by vehicle age
Pass rate drops sharply with age: the MERCEDES-BENZ B-CLASS tested at 0–3 years pass 94.2% of the time, compared with just 64.3% at 15+ years.
| Vehicle age | Pass rate | Tests | Average mileage |
|---|---|---|---|
| 0–3 years | 94.2% | 2,831 | 23,121 miles |
| 3–6 years | 92.6% | 16,906 | 29,753 miles |
| 6–10 years | 84.9% | 33,810 | 56,763 miles |
| 10–15 years | 73.3% | 41,423 | 81,860 miles |
| 15+ years | 64.3% | 15,581 | 100,481 miles |
Common MOT failure reasons for the MERCEDES-BENZ B-CLASS
The most common reason the MERCEDES-BENZ B-CLASS fails its MOT is lamps, reflectors and electrical equipment — present in 42.6% of failed tests, most often logged as "Not working".
| Category | Share of failed tests | Example |
|---|---|---|
| Lamps, reflectors and electrical equipment | 42.6% | Not working |
| Suspension | 36.3% | Ball joint dust cover no longer prevents the ingress of dirt |
| Brakes | 31.0% | Excessively corroded |
| Tyres | 26.4% | Has a cut in excess of the requirements deep enough to reach the ply or cords |
| Visibility | 13.9% | Provides insufficient washer liquid |
| Body, chassis, structure | 11.3% | Constant velocity boot split or insecure, no longer prevents the ingress of dirt |
| Noise, emissions and leaks | 9.6% | Inoperative or indicates a malfunction |
| Seat belts and supplementary restraint systems | 4.4% | Warning lamp indicates a fault |
| Road Wheels | 2.9% | Fixing missing |
| Steering | 1.5% | Ball joint has excessive play |
Related MERCEDES-BENZ models
- MERCEDES-BENZ C-CLASS — 81.4% pass rate
- MERCEDES-BENZ A-CLASS — 85.3% pass rate
- MERCEDES-BENZ E-CLASS — 83.3% pass rate
- MERCEDES-BENZ GLA — 89.4% pass rate
- MERCEDES-BENZ GLC — 91.1% pass rate
- MERCEDES-BENZ CLA — 87.2% pass rate
Frequently asked questions
- What is the MOT pass rate for the MERCEDES-BENZ B-CLASS?
- 79.0% of MERCEDES-BENZ B-CLASS MOT tests pass, based on 110,551 tests in the DVSA anonymised MOT tests and results dataset.
- What are the most common MOT failures for the MERCEDES-BENZ B-CLASS?
- The most common reason the MERCEDES-BENZ B-CLASS fails its MOT is lamps, reflectors and electrical equipment — present in 42.6% of failed tests, most often logged as "Not working".
- Does this show the MERCEDES-BENZ B-CLASS's service history?
- No — this is MOT test data, which covers roadworthiness, not servicing. A service history is a separate record of maintenance work, which a specific car only has if its owner has kept it. See the MERCEDES-BENZ service history guide for how to check and keep one.