Mercedes-Benz G-Class MOT reliability

Mercedes-Benz G-Classs passed their MOT first time 82% of the time across 1,408 tests in 2025. 862 are still licensed in Great Britain.

First-time pass rate

82%

MOTs analysed

1,408

Still licensed (GB)

862

Body type

Suv

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

2021 petrol

6 MOTs

These figures come from only 6 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.

Passed first time 83%. Typical mileage 42,480 (most between 33,704 and 64,193).

2021: 95% → 2024: 75% → 2025: 83%

Most common failures

Brake pads: less than 1.5 mm thick (16.7%)
Wipers: does not clear the windscreen effectively (16.7%)
Condition: buckle not functioning as intended (16.7%)

2021 diesel

4 MOTs

These figures come from only 4 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.

Passed first time 100%. Typical mileage 21,639 (most between 19,455 and 34,597).

2021: 57% → 2024: 100% → 2025: 100%

Most common failures

2021 ed

1 MOT

These figures come from only 1 MOT test. 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.

Passed first time 100%. Typical mileage 41,144 (most between 41,144 and 41,144).

Most common failures

2021 hybrid

1 MOT

These figures come from only 1 MOT test. 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.

Passed first time 100%. Typical mileage 52,523 (most between 52,523 and 52,523).

2022: 100% → 2023: 100% → 2024: 0% → 2025: 100%

Most common failures

Where 2021 G-Classs fail

Brakes

16.7%

Seat belts & other equipment

16.7%

Visibility & wipers

16.7%

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.