Mercedes-Benz B-Class
From 13,104 MOT tests. Above average for its class.
Common MOT failure categories
Pass rate by registration year
Newer B-Classs fare better: 2021 models pass at 93.8% vs 90.7% for 2019.
What goes wrong?
The most common MOT failure reasons are a tyre seriously damaged, tyre tread depth not in accordance with the requirements and a tyre cords visible or damaged. The top issue, a tyre seriously damaged, caused 285 failures in 2024. Checking tread depth (1.6mm legal minimum, 3mm recommended) before your test can save an unnecessary fail. You can check prices at Black Circles if you need replacements. If you need repairs before retesting, sites like BookMyGarage let you compare local prices.
| a tyre seriously damaged | 285 |
| tyre tread depth not in accordance with the requirements | 98 |
| a tyre cords visible or damaged | 91 |
| a brake lining or pad worn below 1.5mm | 60 |
| wiper blade missing or obviously not clearing the windscreen | 53 |
| an srs malfunction indicator lamp (mil) indicates a system malfunction | 49 |
| the aim of a headlamp is not within limits laid down in the requirements | 41 |
| wiper blade defective | 24 |
| windscreen washers not working or not providing sufficient fluid to clear the windscreen | 24 |
| a suspension pin, bush or joint excessively worn | 19 |
By registration year
| Year | Pass rate | Top failures |
|---|---|---|
| 2021 | 93.8% | a tyre seriously damaged, wiper blade missing or obviously not clearing the windscreen |
| 2020 | 92.7% | a tyre seriously damaged, a tyre cords visible or damaged |
| 2019 | 90.7% | a tyre seriously damaged, tyre tread depth not in accordance with the requirements |
Typical mileage
Half of all B-Classs tested had between 11,997 and 28,157 miles on the clock. Relatively low mileage overall. Many are still fairly young.
At 19,354 median miles, the B-Class has 0.042 failures per 10,000 miles driven.
Other Mercedes-Benz models
Common questions
What is the Mercedes-Benz B-Class MOT pass rate?
The Mercedes-Benz B-Class has a 91.8% MOT pass rate based on 13,104 real MOT tests. This is above the national average.
What are common MOT failures on a Mercedes-Benz B-Class?
The most common MOT failure on the Mercedes-Benz B-Class is a tyre seriously damaged, which caused 285 failures. Other common issues include tyre tread depth not in accordance with the requirements.
What is the typical mileage of a Mercedes-Benz B-Class at MOT?
The median mileage at MOT for a Mercedes-Benz B-Class is 19,354 miles. The middle 50% of vehicles tested have between 11,997 and 28,157 miles.
Buying a used B-Class?
Start with the free tools. Look up the specific vehicle's MOT history on GOV.UK The mileage at each test will show if it's been wound back, and the advisory history tells you what's wearing. Cross-reference that against the typical failures above to see if anything looks unusual for this model.
The free data won't tell you about outstanding finance, theft markers, or write-off history. For that, you need a vehicle history check This is especially important on a private sale where you have fewer legal protections.
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MOT data from DVSA anonymised test results, 2024 test year. Fleet data from DfT vehicle licensing statistics. Crown copyright, OGL v3.0. MOT pass rates are statistical summaries of test outcomes, not assessments of individual vehicle safety or condition. Always inspect a vehicle and check its full MOT history before purchasing. See terms of use.