Mercedes-Benz B-Class
MOT data from 104,041 tests in 2024. Pass rate: 80.9%. Average mileage at test: 75,788 miles.
Common failure reasons
| Reason | Count |
|---|---|
| a suspension joint dust cover missing or no longer prevents the ingress of dirt etc | 3,051 |
| a spring or spring component fractured or seriously weakened | 2,699 |
| a tyre seriously damaged | 2,643 |
| a suspension pin, bush or joint excessively worn | 2,227 |
| a transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etc | 1,868 |
| windscreen washers not working or not providing sufficient fluid to clear the windscreen | 1,524 |
| brake pipe damaged or excessively corroded | 1,464 |
| a rear registration plate lamp or light source missing or inoperative in the case of a single lamp or all lamps | 1,398 |
| engine mil illuminated indicating a malfunction | 1,383 |
| a brake lining or pad worn below 1.5mm | 1,382 |
Pass rate by fuel type
| Fuel | Tests | Pass rate |
|---|---|---|
| Diesel | 72,506 | 81.2% |
| Petrol | 31,055 | 80.1% |
| Electric | 473 | 88.6% |
By registration year
| Year | Tests | Pass rate | |
|---|---|---|---|
| 2005 | 715 | 72.6% | |
| Top failures: a transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etc, a spring or spring component fractured or seriously weakened, windscreen washers not working or not providing sufficient fluid to clear the windscreen | |||
| 2006 | 3,766 | 72% | |
| Top failures: a transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etc, a spring or spring component fractured or seriously weakened, a suspension pin, bush or joint excessively worn | |||
| 2007 | 4,620 | 72.6% | |
| Top failures: a transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etc, a spring or spring component fractured or seriously weakened, a suspension pin, bush or joint excessively worn | |||
| 2008 | 6,183 | 72.3% | |
| Top failures: a transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etc, a suspension pin, bush or joint excessively worn, a spring or spring component fractured or seriously weakened | |||
| 2009 | 7,448 | 73.9% | |
| Top failures: a suspension pin, bush or joint excessively worn, a transmission shaft constant velocity joint boot missing or no longer prevents the ingress of dirt etc, a suspension joint dust cover missing or no longer prevents the ingress of dirt etc | |||
| 2010 | 7,957 | 74.1% | |
| Top failures: a suspension pin, bush or joint excessively worn, a suspension joint dust cover missing or no longer prevents the ingress of dirt etc, a direction indicator lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning | |||
| 2011 | 6,206 | 74.2% | |
| Top failures: a direction indicator lamp missing, inoperative or in the case of a multiple light source more than 1/2 not functioning, a suspension pin, bush or joint excessively worn, a suspension joint dust cover missing or no longer prevents the ingress of dirt etc | |||
| 2012 | 9,026 | 81% | |
| Top failures: a suspension joint dust cover missing or no longer prevents the ingress of dirt etc, a spring or spring component fractured or seriously weakened, brake pipe damaged or excessively corroded | |||
| 2013 | 10,765 | 81.9% | |
| Top failures: a suspension joint dust cover missing or no longer prevents the ingress of dirt etc, a spring or spring component fractured or seriously weakened, a tyre seriously damaged | |||
| 2014 | 13,723 | 83.6% | |
| Top failures: a suspension joint dust cover missing or no longer prevents the ingress of dirt etc, a tyre seriously damaged, a spring or spring component fractured or seriously weakened | |||
| 2015 | 9,107 | 85.7% | |
| Top failures: a tyre seriously damaged, a rear registration plate lamp or light source missing or inoperative in the case of a single lamp or all lamps, a suspension joint dust cover missing or no longer prevents the ingress of dirt etc | |||
| 2016 | 8,907 | 86.9% | |
| Top failures: a tyre seriously damaged, a rear registration plate lamp or light source missing or inoperative in the case of a single lamp or all lamps, a spring or spring component fractured or seriously weakened | |||
| 2017 | 8,985 | 88.3% | |
| Top failures: a tyre seriously damaged, a rear registration plate lamp or light source missing or inoperative in the case of a single lamp or all lamps, a tyre cords visible or damaged | |||
| 2018 | 5,897 | 90.3% | |
| Top failures: a tyre seriously damaged, a rear registration plate lamp or light source missing or inoperative in the case of a single lamp or all lamps, a tyre cords visible or damaged | |||
| 2019 | 664 | 92.3% | |
| Top failures: a tyre seriously damaged, a rear registration plate lamp or light source missing or inoperative in the case of a single lamp or all lamps, tyre tread depth not in accordance with the requirements | |||
Mileage at test
25th percentile
35,724 mi
Median
68,819 mi
75th percentile
96,183 mi
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