2022 Mercedes-Benz GLB — MOT failures & pass rate
Across 5,762 MOT tests analysed for the 2022 Mercedes-Benz GLB, the most common recorded failure areas were tyres, lighting & signalling and brakes. Its pass rate of 93.3% was above the average for cars of a similar age (91.7%). Higher-mileage examples failed more often — 12.1% in the 60-90k group versus 5.2% in the 0-30k group.
How it compares
Top failure categories
| # | Category | % of tests affected | Tests |
|---|---|---|---|
| 1 | Tyres | 3.6% | 206 |
| 2 | Lighting & signalling | 1.4% | 81 |
| 3 | Brakes | 1.4% | 80 |
| 4 | Visibility | 1.3% | 74 |
| 5 | Suspension | 0.4% | 21 |
| 6 | Other defects | 0.4% | 20 |
Most common specific failures
The exact components most often recorded as failures — more specific than the categories above.
| # | Failure item | Times recorded |
|---|---|---|
| 1 | Headlamp aim | 80 |
| 2 | Brake pads | 74 |
| 3 | Tread depth | 57 |
| 4 | Wipers | 57 |
| 5 | Registration plates | 34 |
| 6 | Washers | 20 |
Top advisory categories
Advisories aren't failures, but they flag work likely needed soon — useful when budgeting.
| # | Category | % of tests with advisory | Tests |
|---|---|---|---|
| 1 | Tyres | 17.1% | 987 |
| 2 | Brakes | 9.5% | 546 |
| 3 | Other defects | 8.3% | 480 |
| 4 | Visibility | 3.0% | 174 |
| 5 | Suspension | 1.9% | 112 |
| 6 | Seat belts & restraints | 0.4% | 25 |
Failure rate by mileage
Higher-mileage cars tend to fail more — often the most useful guide to real condition.
| Mileage band | Tests | Fail rate |
|---|---|---|
| 0-30k | 3,569 | 5.2% |
| 30-60k | 2,031 | 8.7% |
| 60-90k | 141 | 12.1% |
Failure rate by age
By fuel type
| Fuel | Tests | Fail rate |
|---|---|---|
| Petrol | 4,669 | 6.5% |
| Diesel | 1,093 | 7.2% |
Trend over time
| Dataset year | Tests | Fail rate |
|---|---|---|
| 2024 | 306 | 4.9% |
| 2025 | 5,444 | 6.8% |
What to check before buying a 2022 GLB
Before buying a 2022 Mercedes-Benz GLB, focus on the areas it most often fails on. Tyres accounted for 3.6% of tests for this year.
- Tyres (3.6% of tests): Usually a quick, known-cost fix, but check tread, age and uneven wear (which can hint at alignment or suspension issues). Typical repair: £50–£120 per tyre.
- Lighting & signalling (1.4% of tests): Often a cheap bulb, but persistent issues can mean wiring or corrosion in the units. Typical repair: £10–£150.
- Brakes (1.4% of tests): Pads/discs are routine wear; binding, imbalance or corroded pipes are more serious — test for pulling under braking. Typical repair: £100–£350 per axle.
Repair costs are rough UK ballpark ranges to set expectations, not quotes — actual prices vary widely by car, parts and garage.
Frequently asked questions
How many 2022 Mercedes-Benz GLBs pass their MOT?
93.3% of the 5,762 2022 Mercedes-Benz GLB MOT tests in this dataset passed — a 6.7% fail rate.
What is the most common MOT failure on a 2022 Mercedes-Benz GLB?
Tyres, recorded in 3.6% of tests, followed by lighting & signalling (1.4%).
Does the 2022 GLB get worse with mileage?
Its MOT fail rate rises from 5.2% in the 0-30k band to 12.1% in the 60-90k band.
Methodology & source. Based on 5,762 MOT tests. Dataset: DVSA MOT testing data (2021,2022,2023,2024,2025). Data last updated 2026-07-01. Figures reflect MOT-testable defects only — read the methodology for how these are calculated and what they don't measure.