MOT or Service: What Is the Difference and When Is Each Due?

An MOT is a yearly legal check that your car meets minimum safety and environmental standards on the day of the test. A service is maintenance, such as fresh oil, filters and inspections, that keeps the car reliable between tests. The MOT is compulsory once a car is three years old. Servicing is not a legal requirement, but skipping it usually costs more in the long run.

What is the difference between an MOT and a service?

The MOT checks things like lights, brakes, tyres, steering, suspension, seatbelts, the windscreen and emissions against a legal standard. It does not involve changing oil or replacing worn parts unless they fail.

A service is preventative. It replaces fluids and filters at set intervals and looks for wear before it becomes a fault or a fail.

When is each one due?

• MOT: by the third anniversary of first registration, then every year. You can test up to a month minus a day early and keep the same renewal date. See can you MOT your car early.

• Service: follow the manufacturer's schedule in the handbook or on the dashboard reminder. For many cars that is every 12 months or a set mileage, whichever comes first. Some cars use a variable or long-life schedule with longer gaps.

You can check your MOT date on the GOV.UK MOT history service.

What does a service usually include?

Exactly what is done depends on the car and its schedule, but services usually fall into two levels.

Interim or annual service

• Engine oil and oil filter change

• Checks on brakes, tyres, lights, wipers, battery and fluid levels

• Visual checks of suspension, steering and exhaust

• Reading any stored fault codes

Full or major service

Everything in an interim service, plus items due at longer intervals, which may include:

• Air and cabin filters

• Spark plugs on petrol engines

• Fuel filter on some diesels

• Brake fluid

• Belt checks or replacement where the schedule calls for it

Do electric cars need servicing?

Yes. Electric cars have no engine oil or spark plugs, but they still need regular checks on brakes, tyres, suspension, the cabin filter, coolant for the battery and motor, and the 12-volt battery. Our EV hub has more on owning an electric car.

Does an independent service affect my warranty?

Generally, no, as long as the work follows the manufacturer's schedule and uses parts and fluids that meet the manufacturer's specification, and it is properly recorded. Our guide to independent servicing and your warranty explains this in more detail.

Should I have my car serviced at the same time as the MOT?

Many people do, because it means one visit and any wear found during the service can be dealt with before the test. It is not required, and the two can be done at different times of year if that suits you better.

Common questions

Is a service a legal requirement?

No. The MOT is a legal requirement, but servicing is not. A missing service history can, however, lower a car's value and may affect warranty claims.

Can a car pass its MOT but still need a service?

Yes. A car can meet the minimum standard on the day while still being overdue for an oil change or other maintenance.

How do I know which service my car needs?

Check the handbook, the service book or the dashboard reminder. If you are not sure, a service centre can look it up from the registration.

Book a service in Barnsley

Our service centre in Barnsley, South Yorkshire can help. Our labour rate is £80 per hour plus VAT, and our menu prices include VAT. Call Customer Care on 01226 574321. For more maintenance advice, see our car care pages.

This guide is general information, not legal or financial advice. Updated October 2026.