Mercedes-Benz B-Class MOT Failure Rate — 15+ Years Old
This model shows significant deterioration in this age bracket, with a 44.5% failure rate. Pre-MOT inspection strongly recommended, especially for lamps & electrics.
Component Risk Breakdown (15+ Years)
Which parts of a 15+-year-old Mercedes-Benz B-Class are most likely to cause an MOT failure:
How Does This Compare?
Mercedes-Benz B-Class MOT failure rate across all age groups:
| Age | Failure Rate | Tests | Worst Area |
|---|---|---|---|
| 0-2 years | 8.3% | 11,661 | Tyres |
| 3-5 years | 10.8% | 56,178 | Tyres |
| 6-10 years | 21.3% | 133,888 | Lamps & Electrics |
| 11-15 years | 37.9% | 90,872 | Lamps & Electrics |
| 15+ years | 44.5% | 15,169 | Lamps & Electrics |
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Frequently Asked Questions
Is a 15+ year old Mercedes-Benz B-Class reliable?
15+-year-old Mercedes-Benz B-Class vehicles have a 44.5% failure rate, which is above average. Consider a pre-MOT inspection, particularly checking lamps & electrics.
What are the common MOT failures on a 15+ year old Mercedes-Benz B-Class?
The most common MOT failure areas at this age are:
- Lamps & Electrics — 10.5% failure risk
- Suspension — 9.6% failure risk
- Brakes — 9.2% failure risk
How can I prepare my Mercedes-Benz B-Class for its MOT?
For a 15+-year-old Mercedes-Benz B-Class, focus on: (1) Lamps & Electrics — the most common failure area at this age. (2) Check all lights and bulbs. (3) Inspect tyres for tread depth and damage. (4) Consider a pre-MOT check at a local garage (£20–£40). You can also use our free prediction tool for a personalised risk breakdown.
Other Mercedes-Benz B-Class Age Groups
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Data methodology: Failure rates are weighted averages across all mileage bands for the 15+-year age group, calculated from official DVSA MOT test records. Only combinations with 100+ tests are included. Data covers 142 million MOT tests across the UK.
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