Understanding Vehicle Services: Interim, Full & Major Explained

What Is Vehicle Servicing?

Vehicle servicing is routine maintenance designed to keep your car running safely and efficiently. We schedule different types of services “Interim, Full, and Major ”  based on mileage or time intervals to detect and fix issues before they cause breakdowns

Why Is It Important?

Regular servicing preserves engine health, improves fuel economy, maintains safety, and protects your manufacturer warranty. The Society of Motor Manufacturers and Traders (SMMT) confirms that serviced vehicles have better reliability and higher resale values.

According to the UK Department for Transport (DfT), around 16% of road accidents in the UK are attributed to mechanical faults, many of which regular servicing could prevent. Neglecting essential maintenance significantly increases the risk of vehicle breakdowns or failures on the road.

Service Comparison Table Explained

Service Details

Service Item Interim Service Full Service Major Service
Intervals 6 Months or 6,000 miles 12 months or 12,000 miles 24 months or 24,000 miles
Number of Checks 25 40 60
Parts Included
Engine Oil
Oil Filter
Air Filter
Pollen Filter
Top-ups Included
Windscreen additive
Coolant
Brake Fluid
Power Steering Fluid
AdBlue (Diesel engines only – extra cost if needed)
General Checks
External lights, instrument warning lights and horn operation
Internal / Vision Checks
Door, bonnet and lock operation
Operation and condition of windscreen wipers and washers
Pollen filter condition and advise if replacement needed (extra cost)
Air conditioning system operation
Windscreen for cracks and chips
External and internal mirror condition
Number plate condition
Seat belt operation
Engine Checks
General oil leaks and advice
Antifreeze strength and advise if replacement needed (extra cost)
Radiator and coolant hoses condition and leaks (including header tank)
Radiator cap
Electrical coolant fan (if applicable)
Auxiliary drive belts (NOT timing belt) condition and tension
Fuel system and tank (if visible)
Timing belt replacement intervals and advise
Change spark plugs dependant upon age and mileage (extra cost)
Fuel filter replacement dependant upon age and mileage (extra cost)
Brakes Checks
Brake fluid condition and advise if replacement needed (extra cost)
Visual check of brake pads for wear
Visual check of brake discs for wear
All visible brake pipes and hoses
Hand brake operation
Brake callipers for leaks and security
Wheels and Tyres Checks
Tyre condition and tyre depths
Tyre pressure and adjust
Steering and Suspension Checks
Road springs
Steering/suspension components
Steering rack gaiters condition
Shock absorber condition
Wheel bearings
Exhaust Checks
Exhaust smoke (diesel)
Exhaust condition and advise
Drive System Checks
Check drive shaft gaiters for security and report leaks
Clutch operation
Clutch fluid level (if applicable)
Transmission oil leaks
Final Checks
Reset vehicle service light where applicable
Stamp Service Book

Interim Service: Focuses on essential maintenance such as engine oil and filter changes, tyre pressure checks, and top-ups. Best for shorter intervals (6 months or 6,000 miles).

Full Service: Includes everything in an interim service plus additional filter replacements (air and pollen) and more detailed inspections every (12 months or around 12,000 miles).

Major Service: Comprehensive maintenance including fuel filter, spark plugs, carbon cleaning, AC sanitisation, brake fluid, and coolant flush, as well as a car wash. Recommended every (2 years or 24,000 miles).

The Comparison table helps you understand what each service type includes and why following the recommended schedule protects your vehicle and wallet.

How Can We Help?

At One Stop Auto Centre, we have completed over 15,000 services, we offer bespoke maintenance plans tailored to your car’s needs. We use manufacturer-approved parts and provide detailed service reports. Our team checks everything from tyre pressure to service light resets. Plus, our free service reminders ensure you never miss an appointment.

Supporting Stats and References

  • Accident Cause: 16% of UK road accidents are caused by mechanical failures linked to poor maintenance (DfT)
  • Effect: Issues like brake failure and engine problems increase the risk of collisions and lead to costly repairs
  • Reference: Department for Transport – Reported Road Casualties

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