Isuzu Big MOT reliability

Isuzu Bigs passed their MOT first time 60% of the time across 42 tests in 2025.

These figures come from 42 MOT tests. That's a fairly small number of cars, so they may not be typical of these cars as a whole.

First-time pass rate

60%

MOTs analysed

42

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

2004 diesel

5 MOTs

These figures come from only 5 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 40%. Typical mileage 111,846 (most between 100,826 and 171,020).

2016: 0% → 2017: 0% → 2018: 0% → 2019: 100% → 2020: 100% → 2021: 67% → 2022: 44% → 2023: 63% → 2024: 0% → 2025: 40%

Most common failures

Pre 01/07/2008 Turbo: emissions exceed level of metered smoke for a turbo charged engine (20.0%)
Rbt (sp): efficiency below requirements (20.0%)
Prescribed areas: prescribed area is excessively corroded (20.0%)
Door condition: cannot be opened from outside the vehicle (20.0%)
Headlamp aim: too low (20.0%)

Where 2004 Bigs fail

Body, structure & corrosion

20.0%

Wheels & tyres

20.0%

Brakes

20.0%

Lights & electrics

20.0%

Steering

20.0%

Exhaust, emissions & leaks

20.0%

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.