Know Your MOT

MOT failure rate and common problems for the Humber 14/40, and how to check your own car by registration.

Updated 05 September 2026.

5.3%fail rate

Humber 14/40 MOT failure rate

What a Humber 14/40 fails its MOT on, and the part that fixes each.

What it fails on, and why

Brakes33.3% 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.

Tyres33.3% 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.

Lamps & electrical33.3% 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.

Fuel system33.3% of failures

Fuel-system failures are leaks or an insecure filler cap.

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: Humber 14/40 brake pads and discsShop Humber 14/40 brake pads and discs on AmazonaffiliateFind Humber 14/40 brake pads and discs on eBayaffiliate
For the tyres failure: Humber 14/40 tyresShop Humber 14/40 tyres on AmazonaffiliateFind Humber 14/40 tyres on eBayaffiliate
For the lamps & electrical failure: Humber 14/40 headlight and indicator bulbsShop Humber 14/40 headlight and indicator bulbs on AmazonaffiliateFind Humber 14/40 headlight and indicator bulbs on eBayaffiliate

Other models

Humber Sceptre MOT failures21.2% failure rateHumber Hawk MOT failures15.4% failure rateHumber S. MOT failures15.9% failure rateFord Fiesta MOT failures27.1% failure rate

Questions and answers

What is the MOT failure rate of the Humber 14/40?

It fails 5.3% of its MOT tests across the DVSA record, from 57 tests.

What do these cars fail their MOT on most?

The most common failure area is brakes, at 33.3% of this model's failures.