Mercedes-Benz G MOT reliability

Mercedes-Benz Gs passed their MOT first time 92% of the time across 2,012 tests in 2025.

Example photo of a Mercedes-Benz G — Photo: User:Enslin · CC BY-SA 3.0 · Wikimedia Commons

First-time pass rate

92%

MOTs analysed

2,012

Still licensed (GB)

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Body type

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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

2020 petrol

279 MOTs

Passed first time 93%. Typical mileage 33,730 (most between 24,893 and 44,604).

2021: 100% → 2022: 83% → 2023: 90% → 2024: 93% → 2025: 93%

Most common failures

Registration plates: does not conform to the specified requirements (1.4%)
Malfunction indicator lamp: inoperative or indicates a malfunction (1.4%)
Condition: has a cut in excess of the requirements deep enough to reach the ply or cords (1.4%)
Condition: has a bulge, caused by separation or partial failure of its structure (1.1%)
Tread depth below requirements of 1.6mm (1.1%)

2020 diesel

123 MOTs

Passed first time 91%. Typical mileage 44,333 (most between 34,856 and 56,296).

2021: 100% → 2022: 100% → 2023: 89% → 2024: 91% → 2025: 91%

Most common failures

Registration plates: does not conform to the specified requirements (3.3%)
Condition: has a cut in excess of the requirements deep enough to reach the ply or cords (2.4%)
Washers: not working (0.8%)
Wipers: does not clear the windscreen effectively (0.8%)
Headlamp aim: too low (0.8%)

2020 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 16,895 (most between 16,895 and 16,895).

2023: 100% → 2025: 100%

Most common failures

Where 2020 Gs fail

Wheels & tyres

3.9%

Exhaust, emissions & leaks

1.4%

Visibility & wipers

0.7%

Brakes

0.4%

Lights & electrics

0.4%

Suspension & axles

0.4%

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.