Mercedes-Benz B170 MOT reliability

Mercedes-Benz B170s passed their MOT first time 50% of the time across 10 tests in 2025.

These figures come from only 10 MOT tests. With so few cars, a single pass or fail changes the percentages a lot, so treat them as a rough guide rather than a true average.

First-time pass rate

50%

MOTs analysed

10

Still licensed (GB)

–

Body type

–

Pass rate by year of first registration

Older cars fail more often, so compare a car with others of the same age. Years with very few MOTs can show extreme pass rates, even 0% or 100%, so give more weight to years with more tests.

In detail:

First registered

2006 petrol

4 MOTs

Passed first time 50%. Typical mileage 107,893 (most between 104,368 and 111,780).

2009: 89% → 2010: 85% → 2011: 73% → 2012: 78% → 2013: 75% → 2014: 83% → 2015: 76% → 2016: 56% → 2017: 40% → 2018: 100% → 2019: 100% → 2020: 75% → 2021: 25% → 2022: 25% → 2023: 50% → 2024: 33% → 2025: 50%

Most common failures

Headlamp: not working on dipped beam (25.0%)
Rbt (sp): efficiency below requirements (25.0%)
Shock absorbers: has a serious fluid leak (25.0%)
Other body component: component damaged and likely to cause injury (25.0%)
Hand lever: has insufficient reserve travel (25.0%)

Where 2006 B170s fail

Lights & electrics

50.0%

Body, structure & corrosion

25.0%

Brakes

25.0%

Exhaust, emissions & leaks

25.0%

Suspension & axles

25.0%

Visibility & wipers

25.0%

Looking at a particular car?

See its own MOT history, mileage and red flags, compared with these figures. Free.

Based on 2025 initial MOT tests in DVSA's anonymised MOT dataset (cars and light vans). Contains public sector information licensed under the Open Government Licence v3.0. Model details: Vehicle data by VehiclesDB.