Know Your MOT

MOT failure rate and common problems for the Triumph Trials, and how to check your own car by registration.

Updated 05 September 2026.

4.5%fail rate

Triumph Trials MOT failure rate

What a Triumph Trials fails its MOT on, and the part that fixes each.

What it fails on, and why

Tyres25.0% of failures

Tyres fail for tread below the 1.6mm legal limit across the central three-quarters, uneven or exposed-cord wear, or sidewall damage. The tester inspects all four; a single illegal tyre is a fail.

Other25.0% of failures

This covers a range of smaller items, from a non-working horn to a warning light left on.

Suspension25.0% of failures

Suspension failures usually mean a worn or snapped coil spring, a leaking shock absorber, or play in a lower arm ball joint or bush. The tester checks for corrosion, fractures and excessive movement. A broken front spring is one of the most common failures on higher-mileage cars and is a straightforward replacement.

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.

For the tyres failure: Triumph Trials tyresShop Triumph Trials tyres on AmazonaffiliateFind Triumph Trials tyres on eBayaffiliate
For the suspension failure: Triumph Trials suspension springs and shock absorbersShop Triumph Trials suspension springs and shock absorbers on AmazonaffiliateFind Triumph Trials suspension springs and shock absorbers on eBayaffiliate

Other models

All Triumph models MOT failure rates comparedRanked worst to bestTriumph Bonneville MOT failures9.8% failure rateTriumph Tiger MOT failures9.2% failure rateFord Fiesta MOT failures27.1% failure rate

Questions and answers

What is the MOT failure rate of the Triumph Trials?

It fails 4.5% of its MOT tests across the DVSA record, from 89 tests.

What do these cars fail their MOT on most?

The most common failure area is tyres, at 25.0% of this model's failures.