Regular car servicing is an important part of looking after your vehicle. It can help identify worn or faulty components, maintain your car's performance and provide a record of how it has been maintained.
But what is the difference between an Interim, Full and Major car service? And how do you know which one your car needs?
The answer depends on your car, how much you drive and, most importantly, the manufacturer's recommended service schedule.
For many UK drivers, a Full Service is recommended every 12 months or 12,000 miles, whichever comes first. Higher-mileage drivers may also benefit from an Interim Service between annual services, commonly around every six months or 6,000 miles. However, these are general guidelines rather than universal rules, so always check your vehicle's handbook or service schedule.
Key Facts for UK Drivers
- Interim Service: Often recommended every 6 months or 6,000 miles for drivers covering higher mileage.
- Full Service: Commonly recommended every 12 months or 12,000 miles, although the manufacturer's schedule takes priority.
- Major Service: A more comprehensive service that can involve additional inspections and replacement of components. There is no universal 24-month Major Service interval.
- Service history: A full, well-documented service history can increase buyer confidence and may help your car achieve a higher resale price. Auto Trader currently cites research suggesting a full service history can add around 10–15% compared with similar cars without records.
- Independent garages: You do not necessarily have to use a main dealer for servicing. However, servicing should follow the manufacturer's requirements and use appropriate parts, fluids and specifications.
Interim Service: An Extra Check for Higher-Mileage Drivers
An Interim Service is a less comprehensive service designed to sit between Full Services. It can be particularly useful for drivers who cover a high number of miles or use their vehicle heavily.
RAC currently recommends an Interim Service around every six months or 6,000 miles, whichever comes first, for frequent drivers. It should not replace the vehicle's Full Service.
Who might need an Interim Service?
An Interim Service can be useful if you regularly cover high mileage, particularly if you spend a lot of time commuting or driving for work.
However, there isn't a single mileage figure that means every driver needs an Interim Service. Your vehicle's manufacturer may specify a different servicing schedule, so check your handbook or digital service record before booking.
Frequent motorway driving, repeated short journeys, towing and other demanding driving conditions can also affect how often maintenance is required.
What is included in an Interim Service?
The exact checks vary between garages and vehicles, so it's important to check what is included before booking.
An Interim Service may include:
- Engine oil and filter change: Fresh oil helps lubricate and protect the engine.
- Fluid checks: Essential fluids such as coolant, brake fluid and screenwash may be checked and topped up where required.
- Brake inspection: Brakes can be inspected for signs of wear or potential problems.
- Tyre checks: Tyre condition, tread and pressures can be checked.
- Battery checks: The battery and charging system may be inspected.
- Lights, wipers and other safety checks: These can help identify straightforward issues that need attention.
For example, RAC's current Interim Service includes an engine oil and filter change alongside essential vehicle checks.
Interim Service vs MOT
An Interim Service is not the same as an MOT.
An MOT is a legal test that checks whether a vehicle meets minimum safety and environmental standards for use on UK roads. A service is a maintenance check designed to keep the vehicle running properly and identify issues that may need attention.
Full Service: The Comprehensive Annual Check
A Full Service is more comprehensive than an Interim Service and is commonly recommended once a year or every 12,000 miles, whichever comes first.
However, your manufacturer's service schedule should always take priority. Some vehicles have different intervals or specific maintenance requirements.
A Full Service is designed to provide a more detailed inspection of the vehicle's mechanical and safety systems.
What is included in a Full Service?
The exact checklist varies between garages and vehicle manufacturers, but a Full Service can include:
- Engine oil and oil filter replacement
- Air filter checks or replacement
- Brake inspection
- Tyre inspection
- Steering and suspension checks
- Battery and charging system checks
- Cooling system checks
- Exhaust inspection
- Lights, wipers and washers
- Fluid checks and top-ups
- Safety equipment checks
- Diagnostic checks, depending on the service provider
- Additional manufacturer-recommended checks
For example, RAC's current Full Service includes an oil and filter change, air filter replacement, checks of the steering, suspension, brakes, tyres, exhaust and battery, alongside a diagnostic check.
Because service packages vary, always ask the garage for a breakdown of what is included before you book.
Why does a Full Service matter?
Regular servicing can help identify worn components and developing problems before they become more serious.
It also gives you a documented maintenance history, which can be useful when you eventually sell the car.
A well-documented service history can reassure potential buyers that the vehicle has been maintained. Auto Trader currently reports that a full service history can increase resale value by around 10–15% compared with similar vehicles without service records. The actual effect will vary depending on the car and the condition of the market.
A Major Service is generally more comprehensive than a Full Service and can include additional inspections and replacement of components that have longer maintenance intervals.
However, unlike an Interim or Full Service, there isn't a universal UK rule that says every car needs a Major Service every two years or 24,000 miles.
The work required depends on the manufacturer's service schedule, the vehicle's age and mileage, its engine and how it has been used.
What can be included in a Major Service?
Depending on the vehicle and manufacturer's requirements, a Major Service may involve:
- More detailed mechanical inspections
- Spark plug replacement on applicable petrol engines
- Fuel filter replacement where specified
- Brake fluid replacement where due
- Cabin or pollen filter replacement
- Air filter replacement
- Additional transmission or gearbox checks
- Checks or replacement of other components specified by the manufacturer
Not every Major Service will include all of these items.
For example, spark plugs may have a particular replacement interval specified by the manufacturer, while brake fluid may also have its own recommended replacement schedule.
This is why you should check the manufacturer's service schedule rather than automatically booking a Major Service every 24 months.
Why can a Major Service cost more?
A Major Service can cost more because it may involve additional inspections, labour and replacement parts.
The cost will depend heavily on the vehicle and the work required. Rather than assuming that a Major Service will prevent a specific repair bill, think of regular servicing as a way to identify maintenance issues and worn components before they potentially develop into more serious problems.
Manufacturer Service vs Generic Service
When servicing your car, you may be offered a Manufacturer Service as well as an Interim or Full Service.
A Manufacturer Service follows the servicing requirements set out by the vehicle manufacturer for a particular model.
This can be important because different cars have different maintenance requirements. One vehicle may require a particular filter or fluid to be replaced at a specific mileage, while another may have a different schedule.
RAC's current guidance states that manufacturer servicing follows the official guidelines issued by the vehicle manufacturer, including requirements around parts and their approved quality levels.
Do you have to use a main dealer?
Not necessarily.
UK drivers can use independent garages for servicing, provided the appropriate requirements are met. The important thing is to make sure the work follows the manufacturer's servicing requirements and that suitable parts, fluids and specifications are used.
If your car is still covered by a manufacturer's warranty, check the warranty documentation carefully and keep invoices and service records as evidence that the required maintenance has been completed.
Which service should you choose?
There isn't one service type that is right for every vehicle.
Instead, consider:
- Your manufacturer's service schedule
- How many miles you drive
- The age and condition of your car
- How you use the vehicle
- Which maintenance items are currently due
If you're unsure, check your vehicle handbook or speak to a qualified mechanic before booking.
How Does Service History Affect Used Car Prices?
Your car's service history can make a difference when it comes to selling.
A Full Service History (FSH) provides evidence that the vehicle has been maintained over its lifetime. This can increase buyer confidence and make it easier to demonstrate that routine maintenance has been carried out.
Modern cars may have digital rather than paper service histories, while invoices and receipts can also help demonstrate maintenance.
Auto Trader's current guidance cites research suggesting that a full service history can boost resale value by around 10–15% compared with similar cars without records. However, this isn't a guaranteed increase and the impact depends on the individual vehicle and market conditions.
Keeping your service records up to date can therefore be useful even if you're not planning to sell your car immediately.
Interim vs Full vs Major Service: At a Glance
| Feature | Interim Service | Full Service | Major Service |
|---|---|---|---|
| Purpose | Essential maintenance between Full Services | Comprehensive routine maintenance | More extensive maintenance and component replacement |
| Typical timing | Around 6 months / 6,000 miles for higher-mileage drivers | Around 12 months / 12,000 miles | Depends on manufacturer/service schedule |
| Oil & filter | Usually included | Usually included | Usually included |
| Air filter | Check/replacement depending on service | Often checked or replaced | Depending on manufacturer schedule |
| Spark plugs | Usually not routinely replaced | Depending on schedule | May be replaced when due |
| Brake fluid | Checked | Checked | May be replaced when due |
| Diagnostic check | Depends on provider | Often included | Depends on provider |
| Manufacturer-specific checks | Depending on vehicle | Depending on vehicle | Particularly important |
Important: Service packages vary between garages and vehicles. Always check exactly what is included and use your manufacturer's service schedule as the main reference.
How Much Does a Car Service Cost?
There isn't one fixed UK price for an Interim, Full or Major Service.
The cost can vary depending on:
- Your car's make and model
- Engine size and type
- Vehicle age
- Parts required
- Labour rates
- Your location
- Whether additional repairs or maintenance are required
As a current benchmark, RAC data puts the average quoted price for a Full Service at £298.60. The figure is based on RAC mobile mechanic quotes collected between September and November 2025 and includes parts, labour and VAT for a standard service. RAC says the figure is indicative and actual costs can vary.
For example, the same RAC data puts average quoted Full Service prices at £277.32 for Ford, £284.50 for Vauxhall and £319.02 for Mercedes-Benz.
A Major Service can cost more where additional components need to be replaced, but you should get a quote based on your specific vehicle and the work required.
How Often Should You Service Your Car?
For many UK vehicles, a Full Service is recommended every 12 months or 12,000 miles, whichever comes first.
An Interim Service may be recommended every six months or 6,000 miles, particularly for drivers who cover higher mileage.
However, these are general guidelines. Your manufacturer's service schedule should always take priority because different cars have different maintenance requirements.
Your car may also display a service reminder on its dashboard. If it does, don't ignore it simply because you haven't reached 12 months or 12,000 miles.
What About Low-Mileage Drivers?
Driving fewer miles doesn't necessarily mean you can ignore servicing.
Time matters as well as mileage. Fluids, filters and other components can still require maintenance even when a vehicle isn't driven frequently.
Short journeys can also place different demands on a vehicle compared with longer journeys.
If you mainly make short trips or leave your car unused for long periods, check the manufacturer's recommendations rather than assuming that low mileage means you can extend the service interval.
Car Service vs MOT: What's the Difference?
A car service and MOT are two different things.
An MOT is a legal test for most vehicles over three years old in Great Britain. It checks whether the vehicle meets the required safety and environmental standards at the time of the test.
A service is routine maintenance designed to keep the vehicle operating properly and identify maintenance issues.
An MOT certificate doesn't mean your car has been serviced, and passing an MOT doesn't mean that no maintenance will be required before the next test.
Some garages offer an MOT and service together, which can be convenient, but they remain separate checks.
FAQs: Car Servicing Questions for UK Drivers
Does a Full Service include an MOT?
No. An MOT and Full Service are separate.
An MOT checks whether your vehicle meets the legal safety and environmental requirements, while a service focuses on maintenance and the condition of the vehicle.
Can I skip an Interim Service if I don't drive much?
You may not need an Interim Service if your mileage is low, but you should follow your manufacturer's recommended servicing schedule.
For many drivers, an Interim Service is particularly useful when covering higher mileage between annual Full Services.
What happens if I miss a car service?
Missing a service can mean routine maintenance is delayed and potential problems aren't identified as early as they could be.
If you've missed a service, check your manufacturer's schedule and arrange the required maintenance rather than automatically booking a particular service level.
Does a Full Service fix an engine warning light?
Not necessarily.
A service may include a diagnostic check that can help identify fault codes or other problems, but an illuminated engine warning light may require separate diagnostic work or repairs.
If a warning light appears, don't assume that a routine service will resolve the underlying problem.
What is the difference between a Full Service and a Manufacturer Service?
A Full Service is a comprehensive maintenance package, while a Manufacturer Service follows the specific servicing schedule and requirements set by your vehicle manufacturer.
The exact checks and replacement intervals can therefore differ between vehicles.
Is brake fluid always changed during a Full Service?
No.
Brake fluid may be checked during a Full Service, but replacement depends on the vehicle manufacturer's recommendations and the service package being provided.
Check your vehicle's maintenance schedule to find out when brake fluid replacement is due.
Do electric cars need servicing?
Yes.
Electric vehicles generally have different maintenance requirements from petrol and diesel cars, but they still need regular checks. Items such as tyres, brakes, suspension, steering, lights and other systems still require attention.
The exact service requirements depend on the EV and its manufacturer.
Conclusion
Regular servicing is an important part of maintaining your car, but there isn't a single Interim-Full-Major service cycle that applies to every vehicle.
For many drivers, a Full Service every 12 months or 12,000 miles is a useful general guideline, while an Interim Service around six months or 6,000 miles can be appropriate for higher-mileage drivers.
A Major Service is different. Rather than automatically booking one every two years, check your manufacturer's schedule to find out when additional maintenance and component replacements are due.
Keeping up with servicing can help you identify problems, maintain your vehicle and build a useful service history. It can also give potential buyers greater confidence when you eventually sell.
If you're unsure which service your car needs, check the owner's manual or speak to a qualified mechanic and ask exactly what will be included before you book.