Interim vs Full vs Major Service — Which Does Your Car Need?

One of the most common questions we hear at Watford MOT Centre is: 'What service does my car actually need?' The answer depends on your car's age, mileage, and when it was last serviced. Here is a straightforward guide.

Interim Service — Every 6 Months or 6,000 Miles: An interim service is designed for higher-mileage drivers who cover more than 12,000 miles per year. It covers the essentials: engine oil and filter change, tyre pressure and condition check, brake fluid level, battery test, lights, wipers and top-up of all fluids. It keeps the car safe and the engine fresh between full annual services.

Full Service — Every 12 Months or 12,000 Miles: A full annual service covers everything in an interim service, plus: spark plugs (petrol), fuel filter, cabin/pollen filter, full brake inspection with measurements, coolant condition check, and a thorough 50-point vehicle inspection. This is the standard annual service recommended for most cars.

Major Service — Every 2 Years or 24,000 Miles: A major service goes further still. In addition to everything in the full service, it includes: timing belt inspection (or replacement if due), gearbox fluid check, power steering fluid check, a comprehensive suspension and steering inspection, and a full road test. This is the manufacturer-level service that protects your warranty and catches problems before they become expensive.

Which Do You Need? If your car is due a service but you are not sure which type, bring it in and we will check your service history and advise you honestly — no upselling, just the service your car genuinely needs.

Watford MOT Centre: Unit 1D, 6 Greycaine Road, Watford WD24 7GP. Call 07311 226 868. Open Mon–Fri 08:00–18:30, Sat 09:00–16:30.