MOT failure rate and common problems for the Yamasaki F66-50, and how to check your own car by registration.
Updated 09 September 2026.
Yamasaki F66-50 MOT failure rate
What a Yamasaki F66-50 fails its MOT on, and the part that fixes each.
About 24.0% of Yamasaki F66-50s fail their MOT, most often on lamps & electrical, other, brakes, steering. Confirm any part against your registration or VIN before buying, and have safety-critical work done by a competent mechanic.
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.
Brake failures cover worn pads and discs, an imbalance between wheels, corroded or scored discs, or a binding caliper. Braking efficiency is measured on a rolling road, so a spongy or pulling brake shows up as a low reading.
Steering faults are typically worn track-rod ends or ball joints, play in the rack, or a split gaiter letting grease out and dirt in. Excessive free play at the wheel fails.
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.
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 Yamasaki F66-50?
It fails 24.0% 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 66.7% of this model's failures.