MOT failure rate and common problems for the Adly 300, and how to check your own car by registration.

Updated 05 September 2026.

13.0%fail rate

Adly 300 MOT failure rate

What a Adly 300 fails its MOT on, and the part that fixes each.

What it fails on, and why

Brakes85.7% of failures

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.

Lamps & electrical42.9% of failures

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.

Suspension28.6% 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.

Visibility/wipers14.3% of failures

Visibility failures include torn or smearing wiper blades, a washer jet that does not reach the screen, and chips or cracks in the driver's swept area. Blades and washer fluid are quick, cheap fixes.

Registration plate14.3% of failures

A missing, damaged, dirty or incorrectly-spaced number plate, or one using the wrong font, will fail. A replacement plate is inexpensive.

Tyres14.3% 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.

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 brakes failure: Adly 300 brake pads and discsShop Adly 300 brake pads and discs on Amazonaffiliate Find Adly 300 brake pads and discs on eBayaffiliate

For the lamps & electrical failure: Adly 300 headlight and indicator bulbsShop Adly 300 headlight and indicator bulbs on Amazonaffiliate Find Adly 300 headlight and indicator bulbs on eBayaffiliate

For the suspension failure: Adly 300 suspension springs and shock absorbersShop Adly 300 suspension springs and shock absorbers on Amazonaffiliate Find Adly 300 suspension springs and shock absorbers on eBayaffiliate

For the visibility/wipers failure: Adly 300 wiper bladesShop Adly 300 wiper blades on Amazonaffiliate Find Adly 300 wiper blades on eBayaffiliate

For the registration plate failure: Adly 300 number plateShop Adly 300 number plate on Amazonaffiliate Find Adly 300 number plate on eBayaffiliate

For the tyres failure: Adly 300 tyresShop Adly 300 tyres on Amazonaffiliate Find Adly 300 tyres on eBayaffiliate

Other models

Adly Predator MOT failures28.2% failure rate Adly Fox MOT failures20.6% failure rate Adly Quadzilla MOT failures20.3% failure rate Ford Fiesta MOT failures27.1% failure rate

Questions and answers

What is the MOT failure rate of the Adly 300?

It fails 13.0% of its MOT tests across the DVSA record, from 54 tests.

What do these cars fail their MOT on most?

The most common failure area is brakes, at 85.7% of this model's failures.