Mercedes-Benz GLB MOT Failure Rate
Key Findings for the Mercedes-Benz GLB
- Overall MOT failure rate: 8.6% — 19.4pp below the UK average (28%)
- Highest-risk component: Tyres (3.1% failure risk)
- Most reliable age group: 0-2 years (7.4% failure rate)
- Highest-risk age group: 3-5 years (9.8% failure rate)
- Based on 13,720 official DVSA MOT tests
Failure Rate by Vehicle Age
How the Mercedes-Benz GLB MOT failure rate changes with age:
| Age | Failure Rate | Tests | Worst Area |
|---|---|---|---|
| 0-2 years | 7.4% | 6,839 | Tyres |
| 3-5 years | 9.8% | 6,881 | Tyres |
Component Risk Breakdown
Which parts of the Mercedes-Benz GLB are most likely to cause an MOT failure:
Mercedes-Benz GLB by Age Group
See detailed MOT failure data for each age group:
What Mercedes-Benz GLB Owners Should Watch For
Based on the MOT test data for the Mercedes-Benz GLB, here are the key areas to pay attention to before your MOT:
- Tyres (3.1% failure risk) — Ensure all tyres have at least 1.6mm tread depth across the central three-quarters. Check for sidewall damage, bulges, and uneven wear.
- Lamps & Electrics (1.1% failure risk) — Walk around the car and check every bulb — headlights, brake lights, indicators, fog lights, and number plate lights. This is one of the cheapest and easiest fixes.
- Brakes (1.0% failure risk) — Check brake pad thickness, disc condition, and handbrake operation. Listen for grinding or squealing when braking.
Many of these issues are inexpensive to fix when caught early. A pre-MOT inspection at a local garage typically costs £20–£40 and can save you the cost of a retest (£15–£30) plus the inconvenience of a failed MOT.
Frequently Asked Questions
What is the MOT failure rate for a Mercedes-Benz GLB?
The Mercedes-Benz GLB has an overall MOT failure rate of 8.6%, based on 13,720 MOT tests recorded in the DVSA database. This is below the UK national average of approximately 28%.
What are the most common MOT failures on a Mercedes-Benz GLB?
The most common areas for MOT failure on a Mercedes-Benz GLB are:
- Tyres — 3.1% failure risk
- Lamps & Electrics — 1.1% failure risk
- Brakes — 1.0% failure risk
These component risks are weighted averages across all age and mileage bands in the dataset.
Is the Mercedes-Benz GLB reliable for MOT?
Yes, the Mercedes-Benz GLB performs better than average in MOT tests. Its 8.6% failure rate is well below the UK average of 28%, making it one of the more reliable options.
How does the Mercedes-Benz GLB MOT failure rate change with age?
The failure rate increases significantly with vehicle age. Newer Mercedes-Benz GLB models (0-2 years) have a relatively low 7.4% failure rate. This pattern is common across most vehicle models and reflects increased wear on mechanical components over time.
How can I reduce the risk of my Mercedes-Benz GLB failing its MOT?
The most effective steps are: (1) Check all lights and bulbs before your test — lighting failures are the most common and cheapest to fix. (2) Inspect tyre tread depth and condition. (3) Test your windscreen washers and wipers. (4) Listen for unusual noises from brakes or suspension. (5) Consider a pre-MOT check at a local garage. You can also use our free prediction tool to get a personalised risk breakdown for your specific vehicle.
Where can I check the MOT history of a Mercedes-Benz GLB?
You can check any vehicle's full MOT history for free on the official DVSA service. This shows all previous test results, advisory items, and failure reasons. AutoSafe goes further by analysing this data with AI to predict your future MOT outcome.
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Other Mercedes-Benz Models
Compare the Mercedes-Benz GLB MOT failure rate against other Mercedes-Benz models:
Similar Failure Rate Models
These models from other manufacturers have a similar MOT failure rate to the Mercedes-Benz GLB:
Related Guides
- Top 10 MOT Failure Points & How to Avoid Them
- Pre-MOT Checklist: 15 Things to Check Before Your Test
- MOT Failure Rates by Car Make and Model
- How to Check MOT History
Data methodology: Failure rates are weighted averages across all mileage bands, calculated from official DVSA MOT test records. Only age/mileage combinations with 100+ tests are included. Component risks represent the probability of failure in each specific area. Data covers 142 million MOT tests across the UK.
Trust signals: Risk model: CatBoost v55 • Data source: DVSA Open Data (OGL v3) • Last updated: 2026-03-08 • Limitation: population averages; individual vehicle condition, service history and mileage may vary.
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