Car Service Schedule Explained: Interim, Full and Major Service

Interim, full and major service at a glance

The intervals come from UK retailer Blackcircles; mileage figures are converted and rounded. They are a garage convention, not a law. Your manufacturer's schedule may use different names, such as "inspection" and "oil service", and may stretch oil changes on long-life systems.

What an interim service includes

An interim service is the smallest package. Blackcircles describes it as aimed particularly at high-mileage drivers who cover a lot of distance between annual services. WhoCanFixMyCar quotes about one to two hours in the workshop. A typical job list:

• engine oil and oil filter change;
• brake inspection, including pad and disc wear;
• tyre condition, tread depth and pressures;
• lights, wipers and horn;
• top-ups of coolant, screenwash and power steering fluid where fitted;
• battery condition.

It does not replace the annual service. If you drive 30,000 km a year or more, it keeps oil fresh between full services; if you drive 8,000 km a year, you probably do not need it.

What a full service includes

A full service is the standard yearly visit. WhoCanFixMyCar lists 60 or more checks, and Blackcircles adds air filter replacement and a deeper look at the engine and drivetrain. Expect two to three hours. On top of the interim work, it usually covers:

Ask for the job list before you book. Two garages can sell a "full service" with quite different content, and the price only means something when you compare the same work.

What a major service includes

A major service is a full service plus the items your manufacturer wants replaced every two years or at higher distances. WhoCanFixMyCar names brake fluid, spark plugs on petrol engines and the fuel filter on diesels. Blackcircles adds cabin filters and a closer examination of the fuel system and suspension.

Brake fluid is the item most often skipped, so check whether your schedule sets it by time, by distance or both. Some larger jobs are not part of any package. A timing belt, gearbox oil or a wet-belt inspection follow their own intervals, so check the schedule for these separately and ask for them by name.

Manufacturer schedule vs garage package

The manufacturer's schedule is the reference that counts: for the warranty, for any goodwill claim and for the car's value later. Garage packages are a convenient way to sell that work, but they do not always match it exactly.

1. Read the handbook or the service indicator. Many modern cars calculate the next due date from use and show it on the dashboard or in the on-board computer.
2. Give the garage the car's VIN. A garage with access to manufacturer data can list exactly what is due at this visit.
3. Compare the job list, not the package name. If the schedule asks for brake fluid this year, a "full service" without it is not the full schedule.
4. Keep long-life schedules honest. A flexible schedule assumes mostly long, steady trips. Lots of short journeys, towing or dusty roads count as severe use and usually justify shorter oil intervals.

Servicing under warranty: dealer or independent garage?

You do not have to use a franchised dealer. The European Commission's guidance on the motor vehicle block exemption rules, Regulation (EU) No 461/2010, says a manufacturer's warranty must not be made conditional on repair and maintenance work that the warranty does not cover being done within the authorised network. The same applies to parts: the warranty should not require the manufacturer's own brand of parts for such work.

There is one limit. The Commission notes that a manufacturer may legitimately refuse a warranty claim where the fault is causally linked to a part from another supplier that failed. Repairs paid for under the warranty itself are a separate matter and are normally arranged through the manufacturer's network.

To protect yourself with an independent garage:

• make sure the work follows the manufacturer's schedule for that visit;
• ask for parts and oil that match the manufacturer's specification, and keep the invoice showing it;
• get the service book stamped or the visit added to the digital service record;
• keep every invoice with the date and distance.

What a service costs

Prices depend on the car, the region and the type of garage, so treat any average with caution. ADAC requested 120 dealer quotes in Hamburg, Cologne and Munich for five brands (BMW, Dacia, Hyundai, Mercedes-Benz and Volkswagen) and evaluated 94 answers. The results were reported in early 2026:

Other findings from the same check:

• Electric cars were cheaper to service at four of the five brands, by 58 % at BMW, 45 % at Mercedes-Benz, 44 % at Volkswagen and 39 % at Hyundai; Dacia was the exception.
• Across all brands, owners of electric cars paid about a third less on average.
• Almost half of the workshops charged higher hourly rates for electric cars, 17 % more on average, which ADAC said had no technical justification.
• City prices in Hamburg were about 10 % higher than in the surrounding area.

ADAC's advice is simple: get written, detailed estimates, compare several workshops, and agree a cost limit with a call-back if the bill would rise by more than 10 %. To see what servicing adds to your yearly costs, enter your quotes in the cost of ownership calculator. For example, the Hamburg M440i figure spread over 12 months is about €88 a month at 2026 prices, before any repairs.

Service vs roadworthiness test

A service and a roadworthiness test (MOT, TÜV, ITV or contrôle technique) are different things. The test is a legal check that the car is safe and meets emission rules on the day; it does not change oil or replace worn parts. A service is maintenance that keeps the car healthy between tests.

Booking both at once can save a trip, and a service just before the test catches simple faults such as a dead bulb or worn wiper blades. Still, a pass certificate is not proof of good maintenance, and a stamped service book is not proof of roadworthiness.

How to keep a service history that adds value

A complete history is one of the strongest selling points of a used car. It shows buyers that intervals were kept and that the expensive items were done on time.

• Keep the invoices, not only the stamps; they show what was replaced and with which specification.
• Write down the date and distance of non-routine jobs such as a timing belt, brake fluid or gearbox oil.
• If the history is digital, ask the dealer for a printout when you sell.
• When buying, check that distances on the invoices rise steadily; the VIN decoder confirms which engine and model year the records should belong to.