If you own a car in the UK, the MOT is one date you can't ignore. Miss it and you're driving illegally with no exceptions, no grace period. Here's everything you need to know about your MOT, what gets checked, and how to boost your chances of passing the first time.
What Is an MOT and Do You Need One?
An MOT test checks that your vehicle meets minimum roadworthiness and environmental standards. Most cars need their first MOT when they turn three years old (four years in Northern Ireland), then every year after that on the anniversary of the last test.
Exemptions include:
Vehicles over 40 years old (unless substantially modified)
Electric goods vehicles registered before March 2015
Tractors and some other agricultural vehicles
How Much Does an MOT Cost?
The maximum a garage can charge is set by law, though many charge less:
Vehicle Type | Max Fee |
Car (up to 8 seats) | £54.85 |
Motorcycle | £29.65 |
Larger vehicles carry higher maximum fees. Full pricing is listed on GOV.UK.
When Is My MOT Due?
Check your last MOT certificate for the expiry date, or use the free GOV.UK checker with your registration number. You can test up to a month (minus a day) before expiry without losing your original renewal date worth doing if you want breathing room for repairs.
What's Checked in an MOT?
Brakes: Tested on rollers for stopping power and balance. The ABS light must work, and the handbrake needs to hold on an incline. Pads, discs and calipers are all inspected.
Tyres: Legal minimum tread depth is 1.6mm across the central three-quarters of the tyre, all the way round. Testers also check for cuts, bulges, and mismatched sizes on the same axle.
Lights and signals: Headlights, indicators, brake lights and (on post-1986 cars) rear fog lights all need to work. Headlight alignment is checked too, to avoid dazzling other drivers.
Steering and suspension: Excess play in the steering, worn bearings, and suspension components are all assessed. Power steering is tested with the engine running.
Seatbelts: Required on all cars built after 1965. Inertia-reel belts must retract properly and the buckle mechanism must work.
Exhaust and emissions: Checked for leaks and tested against legal limits, which vary by vehicle age. Visible smoke is a common fail point.
Bodywork: Sharp edges from corrosion or damage aren't allowed, and rust within 30cm of brakes or steering components can cause a fail.
Windows and mirrors: Windscreen chips must be under 10mm across if inside the wiper sweep area, 40mm outside it. Mirrors must be secure and undamaged.
VIN and number plates: Both need to be legible and match your V5C logbook.
Most Common Reasons Cars Fail
According to DVSA data, the biggest culprits are:
Defect Category | Share of Failures |
Lights & signals | 29.6% |
Suspension | 20.2% |
Brakes | 17.2% |
Tyres | 10.4% |
Most of these are cheap, quick fixes if you catch them before the test rather than during it.
Dangerous, Major and Minor Faults Explained
Faults fall into three categories:
Dangerous: Car cannot be driven until fixed
Major: Fails the test, should be repaired ASAP
Minor: Passes, but needs addressing soon
Can You Drive a Car That's Failed Its MOT?
Only if your existing certificate is still valid and no dangerous faults were recorded. There's no 14-day grace period once your MOT expires, driving on public roads is illegal. The one exception is driving to a pre-booked MOT appointment; keep proof of the booking with you in case you're stopped.
If you're not driving the car, you'll need to declare it SORN.
What Happens After a Failed MOT?
You've got two real options: repair and retest, or sell/scrap. If the garage carries out repairs and retests within 10 working days, it's usually a free partial retest. Take it elsewhere for repairs and bring it back within the same window, and it's often free to leave it longer and you'll pay in full. A different garage entirely will charge full price, as they're testing it fresh.
What Does an MOT Advisory Mean?
An advisory means your car passed, but something needs attention soon; worn brake pads or tyres nearing the tread limit are typical examples. Ignore them and they'll likely become fail points at your next test, and they can knock money off resale value too.
Pre-MOT Checklist
A few minutes of prep can save you a failed test:
Clean your number plates and interior/boot
Check all lights with someone standing outside the car
Inspect wiper blades for tears
Run the 20p tyre tread test and check pressures
Top up oil, screenwash and brake fluid
Test the horn
Make sure mirrors are secure
Confirm your VIN matches your V5C
FAQ’s
Is there a grace period after my MOT expires?
No. Driving without a valid MOT is illegal from the day it expires.
Can I drive to a pre-booked MOT test?
Yes, but only with proof of the booking, and only if the car is otherwise roadworthy.
What's the difference between an MOT and a service?
An MOT checks legal roadworthiness; a service checks the mechanical health of the engine, gearbox and clutch, which the MOT doesn't cover.
Can I tax my car without a valid MOT?
No, you need a valid MOT to tax most vehicles.
Staying on top of these checks is the simplest way to avoid a failed test and unexpected repair bills. If you'd rather leave it to the professionals, the team at London Motor Sports can run a full pre-MOT inspection and handle any repairs before your test date.
Comments