Guides
Plain-English MOT guides.
Nothing irritates us more than a garage explaining the MOT through vague reassurance. Each guide sits on the same UK government data as the car pages.
- 01
How UK MOT pass rates are actually calculated
Every MOT statistic you read on MOTCost is built from the DVSA's own test records. Here's how a "pass rate" is really computed, why it's not the same as "reliability", and where the numbers break down.
- 02
How to read a UK MOT certificate, line by line
Every box on a VT20 (pass) and VT30 (failure) explained — what each defect category really means, what counts as advisory, and when to push back.
- 03
Major, Dangerous, Advisory: what UK MOT defect categories actually mean
DVSA's three defect categories decide whether you drive home today. Plain definitions, what each forces you to do, and how testers decide between them.
- 04
MOT vs service: what each one actually checks (and why it matters)
The MOT is a 45-minute roadworthiness test. A service is 90+ minutes of preventive maintenance. Mixing them up costs UK drivers around £200 a year in needless work.
- 01
The 30-minute pre-MOT walkaround that catches most fails
Six checks any driver can do at home with a torch, a coin, and a friend in the driver's seat. Each one targets a top-five UK MOT failure.
- 02
How to check your tyre tread at home (and why testers fail you on it)
Tyre tread under 1.6mm is the most common Major defect on UK MOTs. A 20p coin tells you in thirty seconds. A digital gauge tells you in five.
- 01
A short history of the UK MOT — from 1960 to today
The Ministry of Transport test was introduced in 1960 to weed out unsafe lorries; sixty years on it covers nearly every car on UK roads. The story of how it got here.
- 02
MOT exemptions: classics, EVs, and other corner cases
Some UK cars don't need an MOT at all. Here's the rolling 40-year classic exemption, the goods-vehicle thresholds, the EV nuances, and what counts as 'substantially altered'.