Interim vs Full vs Major Car Service – Which Do You Need?

Interim vs Full vs Major Car Service – Which Do You Need?

Regular car servicing is essential for keeping your vehicle safe, reliable and performing at its best. However, many motorists are unsure which type of service their vehicle actually needs. Should you book an Interim Service, a Full Service, or a Major Service?

While all three are designed to maintain your vehicle, they differ significantly in terms of the checks performed, the parts replaced and the level of maintenance provided. Choosing the right service depends on your vehicle's age, mileage, driving habits and the manufacturer's recommended service schedule.

In this guide, we'll explain the differences between interim, full and major car servicing, what each service includes, when you should book them and how regular maintenance can help you avoid expensive repairs while extending the life of your vehicle.

Why Is Regular Car Servicing Important?

Your vehicle contains hundreds of moving components that experience wear every time you drive. Engine oil degrades, filters become blocked, brake components wear down and fluids gradually lose their effectiveness.

Routine servicing helps to:

• Improve vehicle reliability
• Reduce the risk of breakdowns
• Improve fuel efficiency
• Extend engine life
• Enhance braking performance
• Maintain vehicle safety
• Detect problems early
• Reduce long-term repair costs
• Protect your vehicle's resale value

Skipping scheduled servicing may save money in the short term, but it can often lead to much larger repair bills later.

What Is an Interim Car Service?

An Interim Service is a basic maintenance service designed for vehicles that cover a high annual mileage or are driven frequently between annual services.

It focuses on the most important maintenance items that help keep your vehicle safe and running efficiently.

Most garages recommend an interim service every 6 months or approximately 6,000 miles, especially if you regularly drive:

• Long motorway journeys
• Daily commutes
• Business mileage
• Delivery routes
• Taxi or private hire vehicles

What Is Included in an Interim Service?

Engine Oil Replacement

Old engine oil is drained and replaced with fresh oil that meets the manufacturer's specification.

Oil Filter Replacement

A new oil filter is fitted to ensure clean oil circulates through the engine.

Fluid Level Checks

Technicians inspect and top up fluids such as:

• Engine coolant
• Brake fluid
• Windscreen washer fluid
• Power steering fluid (where applicable)

Tyre Inspection

Tyres are checked for:

• Tread depth
• Pressure
• Uneven wear
• Damage

Brake Inspection

A visual inspection of the braking system is carried out to check for excessive wear.

Lights and Electrical Checks

Exterior lights, indicators and warning lights are tested.

Windscreen Wipers

The condition and operation of the wiper blades are inspected.

An interim service is designed to keep your vehicle running safely between more comprehensive services.

What Is a Full Car Service?

A Full Service is a more detailed inspection covering many additional components.

It is generally recommended once every 12 months or every 12,000 miles, depending on the manufacturer's guidance.

A full service is suitable for most privately owned vehicles and provides a comprehensive health check.

What Is Included in a Full Service?

A full service usually includes everything in an interim service, plus additional inspections such as:

• Air filter inspection or replacement
• Cabin (pollen) filter inspection
• Brake system inspection
• Battery health check
• Cooling system inspection
• Suspension inspection
• Steering inspection
• Drive belts
• Exhaust inspection
• Underbody inspection
• Wheel bearing checks
• Wheel alignment inspection
• Road test

Typically, a full service involves around 50 to 70 individual inspection points, depending on the manufacturer.

What Is a Major Car Service?

A Major Service is the most comprehensive routine maintenance service available.

It includes everything covered in both an interim and full service, along with replacing additional service items that wear over longer periods.

Major servicing is normally recommended every 24 months or approximately 24,000 miles, although the interval varies by manufacturer.

What Is Included in a Major Service?

Engine Oil and Oil Filter Replacement

Fresh oil and a new oil filter.

Air Filter Replacement

Ensures maximum airflow into the engine.

Cabin Filter Replacement

Improves interior air quality.

Fuel Filter Replacement (where applicable)

Particularly important for diesel vehicles.

Spark Plug Replacement (petrol vehicles)

Replacing worn spark plugs improves:

• Fuel economy
• Engine performance
• Easier starting
• Reduced emissions

Brake Fluid Check (and replacement if required)

Brake fluid absorbs moisture over time, reducing braking performance.

Coolant Inspection

The cooling system is inspected and coolant condition checked.

Suspension Inspection

All major suspension components are checked for wear.

Steering System Inspection

Steering joints and components are carefully examined.

Exhaust Inspection

The complete exhaust system is checked for leaks and corrosion.

Battery Test

The battery and charging system are tested.

Comprehensive Safety Inspection

A full inspection covering numerous additional safety and mechanical components.

Major services often include 70 to 80 separate inspection points, depending on the vehicle.

Interim vs Full vs Major Service

Feature	Interim Service	Full Service	Major Service
Recommended Interval	Every 6 months / 6,000 miles	Every 12 months / 12,000 miles	Every 24 months / 24,000 miles
Engine Oil	✔	✔	✔
Oil Filter	✔	✔	✔
Air Filter	Inspection	Inspection/Replace if needed	✔ Replace
Cabin Filter	Basic inspection	Inspection	✔ Replace
Fuel Filter	✖	Usually inspection	✔ Replace (where applicable)
Spark Plugs	✖	Inspection	✔ Replace (petrol vehicles)
Brake Inspection	✔	✔	✔
Battery Check	Basic	✔	✔
Suspension Check	Basic	✔	✔
Steering Inspection	Basic	✔	✔
Exhaust Inspection	Basic	✔	✔
Overall Inspection Points	Around 25–35	Around 50–70	Around 70–80

Which Service Do You Need?

Choose an Interim Service If:

• You drive more than 12,000 miles per year.
• You use your vehicle daily.
• You regularly travel long distances.
• Your annual service is still several months away.

Choose a Full Service If:

• Your annual service is due.
• You want a comprehensive inspection.
• Your manufacturer recommends yearly servicing.
• You want to maximise reliability and resale value.

Choose a Major Service If:

• Your vehicle has reached the manufacturer's major service interval.
• Your last major service was approximately two years ago.
• Spark plugs or filters are due for replacement.
• You want the most comprehensive maintenance available.

What Happens If You Miss a Service?

Delaying routine servicing can result in:

• Increased engine wear
• Reduced fuel efficiency
• Poor braking performance
• Premature tyre wear
• Engine overheating
• Increased emissions
• Unexpected breakdowns
• More expensive repairs

Regular servicing is always more economical than repairing avoidable mechanical failures.

Additional Services That May Be Recommended

During any service, technicians may identify additional maintenance that helps improve safety and performance.

These may include:

• Hunter Wheel Alignment
• Wheel Balancing
• Brake Fluid Replacement
• Battery Replacement
• AdBlue Top-Up
• Coolant Drain & Refill
• Brake Pad Replacement
• New Tyres

These services are only recommended if required based on your vehicle's condition.

Why Choose Central Tyres Walsall?

At Central Tyres Walsall, we provide professional Interim, Full and Major Car Servicing for all makes and models using high-quality parts, manufacturer-approved lubricants and modern diagnostic equipment. Our experienced technicians carefully inspect every vehicle to identify potential issues before they become costly repairs, helping you stay safe on the road and avoid unexpected breakdowns.

In addition to car servicing, we offer Hunter Wheel Alignment, tyre fitting, wheel balancing, brake servicing, battery replacement, AdBlue top-ups, coolant drain and refill, locking wheel nut removal and a complete range of vehicle maintenance services. We are committed to honest advice, transparent pricing and exceptional customer service, ensuring every vehicle receives the care it deserves.

Contact Central Tyres Walsall

Address:

29 John Street
Walsall
WS2 8AF
United Kingdom

Phone: 01922 625339

Email: [email protected]

Whether your vehicle is due for an Interim Service, Full Service or Major Service, the team at Central Tyres Walsall is here to help. Contact us today to book your next service and keep your car running safely, efficiently and reliably throughout the year.