Car Servicing8 min read

What Does a Full Car Service Include?

A full major service is the most comprehensive maintenance visit your car receives each year. Here's a complete breakdown of every item it covers and what each check is looking for.

Engine Oil and Oil Filter Replacement

Engine oil and the oil filter are renewed at every service — interim and major alike. Engine oil degrades through repeated heat cycling and accumulates combustion by-products over time, progressively losing its viscosity and lubrication effectiveness. Degraded oil accelerates wear on precision-engineered internal components including crankshaft bearings, camshaft lobes and valve train parts.

The correct oil grade and specification is matched precisely to your vehicle's make, model and engine type — never a generic substitute. The filter is replaced simultaneously to prevent residual contaminants from recirculating through the freshly filled system, which would immediately begin compromising the new oil.

Spark Plugs

Spark plugs are replaced at every major service. Worn or fouled plugs cause engine misfires, increased fuel consumption, poor cold-start performance and elevated exhaust emissions. The replacement specification varies significantly by engine type: iridium and platinum plugs fitted to many modern engines have different service characteristics to traditional copper-tipped equivalents, and fitting the wrong specification affects both performance and longevity.

The correct plug for your specific engine is always used — consulting the manufacturer's specification rather than defaulting to a generic equivalent.

Air Filter, Cabin Filter and Fuel Filter

The engine air filter is replaced to maintain clean, unrestricted airflow into the combustion chambers. A partially blocked air filter reduces the volume of clean air reaching the engine, reducing power output, increasing fuel consumption and raising exhaust emissions. Even a filter that appears visually clean may have accumulated fine particulate debris that significantly restricts airflow.

The cabin pollen filter is renewed at every major service to maintain interior air quality and heating and ventilation efficiency. A blocked cabin filter significantly reduces demister performance and can make an otherwise well-functioning climate system appear ineffective. The fuel filter is inspected and replaced where applicable, protecting injectors and fuel delivery components from contamination.

Brake Fluid Change

Brake fluid change is a safety-critical item included in every major service, and one that is sometimes omitted by less thorough providers. Brake fluid is hygroscopic — it absorbs moisture from the atmosphere through microscopic permeation of rubber hoses and seals over time. This moisture absorption progressively lowers the fluid's boiling point.

Under sustained or heavy braking, contaminated brake fluid can reach its boiling point, forming vapour bubbles in the hydraulic lines. Vapour is compressible where fluid is not — the result is a spongy, ineffective pedal at the exact moment maximum braking force is needed. A full fluid change removes absorbed moisture and restores the system to its correct operating specification. If a brake fluid change is not listed in a service quotation, ask specifically whether it is included.

Coolant and All Fluid Checks

Coolant concentration is tested and the cooling system flushed where required. Insufficient antifreeze concentration risks freezing in winter, while degraded coolant loses its inhibitor package and allows internal corrosion of aluminium components including the radiator, cylinder head and water pump housing.

All other fluid reservoirs are inspected and topped up to manufacturer specifications: power steering fluid where applicable, screenwash, and windscreen washer concentrate. These checks ensure that every fluid-dependent system enters the next service interval correctly filled and in acceptable condition.

Brakes, Tyres and Suspension Inspection

All four corners of the braking system are inspected: pad thickness is measured and recorded, disc condition is assessed for scoring, heat cracking and wear relative to minimum thickness limits, and calliper operation is checked for correct function and freedom from seizure. The handbrake mechanism is tested and adjusted if required.

Tyre tread depth is measured across all four corners and compared against the 1.6mm legal minimum. Inflation pressures are corrected to manufacturer-specified values. Tyre sidewall condition, valve stem integrity and any uneven wear patterns are noted. Suspension components — springs, shock absorbers, bushes, anti-roll bar drop links and ball joints — are individually inspected for deterioration.

Belt Inspection, Lighting and Multi-Point Health Check

All accessible drive belts — including the auxiliary belt and its tensioners — are inspected for cracking, glazing, fraying and correct tension. A failed auxiliary belt disables the alternator, water pump and power steering simultaneously, potentially causing immediate secondary damage and leaving the vehicle undriveable.

All exterior lighting circuits are tested individually: headlights and beam alignment, sidelights, indicators, brake lights, reversing lights and number plate illumination. Horn operation and wiper function are confirmed. The visit concludes with a comprehensive multi-point vehicle health audit, and a written report is provided documenting the condition of every item inspected. Your service record is stamped and updated with the date and mileage.

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