MOT failure rate and common problems for the Armstrong Army, and how to check your own car by registration.
Updated 05 September 2026.
Armstrong Army MOT failure rate
What a Armstrong Army fails its MOT on, and the part that fixes each.
What it fails on, and why
Lighting is the single most common MOT failure and the cheapest to put right. A blown headlight, brake-light or number-plate bulb, a cracked lens, or a headlamp beam that points too high or low will all fail. Most are a two-minute bulb swap.
This covers a range of smaller items, from a non-working horn to a warning light left on.
The parts that fix each
If your car has just failed, you have 10 working days to fix the items and get a free partial retest. Confirm the exact fitment against your registration or VIN before buying.
Other models
Questions and answers
What is the MOT failure rate of the Armstrong Army?
It fails 12.0% of its MOT tests across the DVSA record, from 50 tests.
What do these cars fail their MOT on most?
The most common failure area is lamps & electrical, at 33.3% of this model's failures.