“Service” isn’t one fixed thing. In the UK, garages usually offer three levels (interim, full and major), and the right one depends on your mileage, your driving and how long it’s been since the last visit. Pick the wrong level and you either overspend or leave worn parts unchecked.
Here’s what each service covers, how often you need it, and how to choose.
Key Takeaways
- An interim service (every 6 months / 6,000 miles) is a lighter check for high-mileage drivers between full services.
- A full service (every 12 months / 12,000 miles) is the essential annual service most drivers need.
- A major service (every 2 years / 24,000 miles) adds replacement of longer-life parts like spark plugs and brake fluid.
What is an interim service and who needs it?
An interim service is a lighter, more frequent check recommended around every six months or 6,000 miles (RAC). It’s aimed at drivers who cover high mileage and want a safety net between their annual full services.
It typically covers an oil and filter change, fluid top-ups, and inspection of brakes, tyres, steering, suspension and lights. It won’t replace the longer-life consumables a full service does, but it catches the everyday wear that builds up quickly when you’re racking up miles.
If you’re not sure how many miles you’re doing, our team can recommend the right level when you book a service in Aylesbury.
What does a full service include?
A full service is the comprehensive annual check most drivers should have, recommended every 12 months or 12,000 miles. It includes everything in an interim service plus a much longer inspection list, often running to dozens of individual checks.
Expect an oil and filter change, an air filter where due, fluid top-ups, and deeper checks of the engine, brakes, drive belts, and the heating and cooling system. The aim is to catch wear before it becomes a fault, keep the car efficient, and maintain a stamped service history that protects resale value.
What’s different about a major service?
A major service includes everything in a full service, plus the replacement of longer-life parts that don’t need attention every year. It’s usually recommended every two years or 24,000 miles.
That means consumables like spark plugs, air, cabin and fuel filters, brake fluid and coolant get renewed where required. Because more parts are replaced, a major service costs more, but spreading these replacements across a two-year cycle keeps your car dependable and avoids several smaller bills later.
How do you choose the right service level?
Choose based on your annual mileage and time since your last service. Low to average mileage drivers are usually well covered by a full service each year. High-mileage drivers benefit from an interim service in between to stay on top of fast-accumulating wear.
As a rule of thumb: a full service yearly, an interim if you’re doing big miles, and a major service every couple of years. Your vehicle handbook sets the manufacturer’s intervals, which matter if your car is still under warranty. If you’d like a second opinion, speak to our Aylesbury team and we’ll match the service to how you actually drive.
Frequently Asked Questions
What’s the difference between an interim and a full service?
An interim service is a lighter check carried out roughly every six months for high-mileage drivers, covering oil, filter and core safety items. A full service is the comprehensive annual check, with a longer inspection list and additional replacements like the air filter.
Does a service include an MOT?
No, they’re separate. A service is preventative maintenance, while an MOT is a legal roadworthiness test. Many drivers book them together for convenience, but a service on its own does not renew your MOT certificate.
Will skipping a service void my warranty?
It can. Many manufacturer warranties require servicing at set intervals using the correct parts and fluids. Missing services or falling outside the schedule can invalidate cover, so always check your handbook and keep your service history up to date.
The bottom line
Interim, full and major services do different jobs at different intervals: lighter and more frequent, comprehensive and annual, or in-depth every couple of years. Matching the level to your mileage keeps your car reliable without overspending.
Not sure which one you need? Book a service with Tyred & Exhausted in Aylesbury and we’ll recommend the right level for your car and your mileage.