What Is an MOT Test? Everything You Need to Know
The MOT is one of the most important legal requirements for keeping a car on UK roads — and one of the most useful sources of historical data when buying a used car. Here is everything you need to know: what the test covers, how it works, and how to use MOT history to your advantage as a buyer.
What Is the MOT Test?
MOT stands for Ministry of Transport — the government department that introduced the test in 1960. Today it is administered by the DVSA (Driver and Vehicle Standards Agency). The test is a mandatory annual roadworthiness check for most UK vehicles over three years old. It does not assess the overall mechanical condition of a car — it checks whether the vehicle meets the minimum legal safety standard to be driven on public roads at the time of the test.
A valid MOT certificate is a legal requirement. Without one, a vehicle cannot be taxed and cannot legally be driven on a public road (with very limited exceptions). Insurance policies may also be invalidated if a vehicle is driven without a valid MOT.
What Does the MOT Test Check?
The MOT covers a defined list of inspection points across several systems:
Brakes
Brake performance, pad/disc condition, handbrake effectiveness, brake lines
Lights
All exterior lights — headlights, indicators, brake lights, fog lights, number plate light
Steering & Suspension
Steering play, power steering function, shock absorbers, wheel bearings, ball joints
Tyres & Wheels
Minimum 1.6mm tread depth, condition of sidewalls, no unsafe damage, correct fitment
Emissions
Exhaust emissions within legal limits for fuel type. DPF checked for tampering on diesels.
Bodywork & Structure
No sharp edges, sills and floor structurally sound, no excessive corrosion in load-bearing areas
Windscreen & Wipers
Windscreen free of damage in critical zones, wipers effective, washers operational
Horn, Mirrors, Seatbelts
Horn audible, mirrors correctly positioned and undamaged, all seatbelts functioning
The MOT does not check the engine's internal condition, the clutch, gearbox, or air conditioning. These are assessed during a service, not an MOT. A car can pass its MOT and still need significant mechanical work.
Passes, Failures, and Advisories
The MOT result has three possible outcomes per inspection item:
- PPass — the item meets the minimum legal standard. No action required.
- AAdvisory — the item is not yet at failure level but should be monitored or repaired soon. The car passes but the note is recorded.
- FFail — the item does not meet the minimum standard. The vehicle cannot be issued a certificate until the fault is repaired and retested.
Since May 2018, failures are classified as either Major (mandatory repair before certificate is issued) or Dangerous (vehicle must not be driven). Advisories are now classified as Minor.
How Long Does an MOT Take?
A standard MOT with no issues takes approximately 45 minutes to 1 hour. If the tester identifies failures or advisories that require discussion, or if the garage is also carrying out a service at the same time, allow 2–3 hours. Garages with online booking can usually give you a firm time slot.
The maximum fee a garage can charge for a car MOT is £54.85, set by the DVSA. Many garages charge less. The fee covers the test only — any repair work is priced separately.
Using MOT History When Buying a Used Car
Every UK MOT test result is recorded by the DVSA, including the mileage at the time of the test, all pass/fail results, and every advisory. This creates an independent, verifiable record going back to approximately 2005 — and it is available for free.
As a used car buyer, MOT history is one of your most powerful tools:
- Mileage verification — the mileage recorded at each test creates a timeline that immediately exposes clocking (odometer fraud)
- Recurring advisories — the same advisory appearing across multiple consecutive tests indicates a known issue the seller has left unresolved
- Failure patterns — repeated failures for the same component suggest persistent problems or ongoing deferred maintenance
- Gap detection — a large gap in MOT records may indicate the car was off the road, used as a SORN vehicle, or potentially based abroad temporarily
Check the full MOT history for free on VEHIXA before viewing any used car. If the mileage or advisory pattern looks wrong, you save the time and cost of a wasted viewing.