Top 10 Key Checks Performed During a Full Car Service

Getting a full car service is one of the best ways to keep your vehicle running smoothly and safely. Skipping your service not only puts you at risk for sudden breakdowns, but it can also lead to costly repairs that could have been easily avoided. To keep your car reliable, safe, and fuel-efficient, regular servicing is essential.

This guide covers the top 10 key checks that mechanics perform during a full car service. Understanding these checks will help you get the most from every service visit, spot problems early, and know what you’re paying for when you book with your mechanic or garage.

Are you looking for a full car service in Aldershot? Don’t worry, because the Ash Road Service Centre provides thorough car inspections and repairs.

1. Engine Oil and Oil Filter Change

The engine is your car’s heart, and oil is its lifeblood. Fresh oil keeps your engine clean and running smoothly, while the oil filter removes dirt and debris from the engine. During a full service, mechanics check the oil level and quality before draining the old oil and replacing the filter. New, high-quality oil is then added to protect engine components and improve fuel economy.

Why it matters:

Old oil loses its ability to protect the engine. Neglecting oil changes can lead to overheating, reduced performance, or even engine failure.

2. Brake System Check

Your brakes are essential for your safety. During a full service, the mechanic inspects the brake pads, discs (also known as rotors), brake fluid level, hoses, and lines. They look for wear, leaks, and any other signs of trouble. If brake pads are worn or fluid is low, they’ll recommend replacements or a top-up.

Why it matters:

Worn or damaged brakes increase stopping distance and raise your risk of an accident. Spotting brake problems early keeps you and others safe.

3. Tyre Condition and Pressure

Tyres are the only point of contact between your car and the road. Mechanics will check each tyre’s tread depth, look for cracks, bulges, or uneven wear, and test the air pressure. They’ll advise if you need new tyres or a rotation. Properly fitted and balanced tyres are critical for handling, braking, and comfort.

Why it matters:

Bald or under-inflated tyres can cause skidding, punctures, and poor control in wet or dry conditions. Good tyres save fuel and last longer.

4. Lights, Electrics, and Battery Test

A comprehensive car service covers every light and electrical system, headlights, brake lights, turn signals, reverse lights, fog lamps, dashboard warning lights, and more. The mechanic also checks your car’s battery for charge level and any signs of corrosion or loose connections.

Why it matters:

Lights keep you visible and ensure you can see at night or in poor weather conditions. Electric issues can leave you stranded, and a weak battery could fail without warning.

5. Suspension and Steering

The suspension and steering keep your car stable and easy to control. During a service, the mechanic checks shock absorbers, springs, struts, and steering parts for signs of wear, leaks, or damage. They also look at ball joints, track rods, and bushes.

Why it matters:

Faulty suspension or steering can make your car uncomfortable or even dangerous to drive, especially on uneven roads or at high speeds.

6. Fluid Levels and Top-Ups

Beyond engine oil and brake fluid, there are several other essential fluids under the bonnet (hood). These include coolant (antifreeze), power steering fluid, and windshield washer fluid. The mechanic checks each one and tops it up or replaces it as needed.

Why it matters:

Low coolant can lead to overheating. A lack of washer fluid can reduce your visibility. Keeping fluids topped up is a cost-effective measure against major problems.

7. Air Filter and Cabin Filter

The air filter prevents dust and dirt from reaching your engine, while the cabin filter (also known as a pollen filter) ensures clean air in your car. During a full service, the mechanic inspects both and replaces them if they are clogged or dirty.

Why it matters:

A blocked air filter can reduce performance and increase fuel use. A clogged cabin filter leads to poor air quality inside your vehicle.

8. Exhaust System

Your car’s exhaust system consists of pipes, the catalytic converter, and the muffler. Mechanics check for rust, leaks, holes, and loose parts, as well as make sure emissions are within legal limits.

Why it matters:

Exhaust leaks can allow dangerous gases to enter your car and contribute to increased pollution. A faulty system often leads to a failed MOT or other fines.

9. Belts and Hoses

Modern cars rely on several rubber belts (like the timing belt and serpentine belt) and hoses that carry fluids. These wear out over time or could split, crack, or come loose. The mechanic inspects all belts and hoses for signs of wear, correct tension, and leaks.

Why it matters:

A snapped belt or burst hose can lead to significant engine damage or total breakdown, often without warning.

10. Diagnostic System Scan

Most cars built in the last 20 years have onboard computers that store error codes when problems arise. During a full car service, a diagnostic scan tool reads out any stored codes or activity from sensors and electronic systems. This can reveal hidden faults before they become big, expensive problems.

Why it matters:

Early detection of errors lets you fix problems before they cause breakdowns, failed MOTs, or higher repair bills.

Additional Important Checks Often Included

• Wheel Alignment: Checked and adjusted as needed for smooth driving
• Wipers and Windscreen: Examined for streaks, cracks, or wear
• Fuel System: Inspected for leaks or blockages
• Drive Shafts and CV Joints: Checked for noise or damage
• Doors, Locks & Bonnet: Tested for proper function and security
• Number Plate and Horn: Confirmed in working order

Each garage may include additional items as part of its service package, so always ask for a detailed checklist when booking.

When Should You Book a Full Car Service?

A full service is usually recommended once every year or every 12,000 miles, whichever comes first. If you frequently make short journeys or drive in challenging weather conditions, more frequent checks can be advisable. If your car is under warranty, follow the manufacturer’s schedule to keep it valid.

Signs you need a service sooner include:

• Strange noises when braking, turning, or accelerating
• Warning lights on the dashboard
• Changes in how the car feels or drives
• Reduced fuel economy
• Unusual smells (burning, fuel, exhaust, etc.)

Don’t wait for issues to arise—preventative care is more affordable and safer.

What To Expect: Booking, Inspection, And Aftercare

Booking: Select a trusted and skilled garage or mobile mechanic. Ask what is covered in the full service. Get a written estimate before work begins. Choosing a reputable garage, such as Ash Road Service Centre, ensures thorough inspections and expert care

Inspection: A skilled technician will review their checklist, inform you about any issues found, and recommend necessary repairs or parts. Feel free to ask if anything is unclear.

Aftercare: Keep your service record safe and secure. Some garages offer reminders for your next service or MOT.

Conclusion

A full car service covers much more than just an oil change. It’s a thorough health check for your vehicle, ensuring everything from brakes to exhaust is in good working order. Knowing what goes into a full-service and what items to expect gives you confidence as a car owner, helping you keep your car running smoothly for years to come.

Stay safe, save money, and keep your car reliable by booking regular, comprehensive services and ensuring each of these key checks is carried out professionally. If you’re unsure what your car needs, speak to your local garage or a mobile expert; they’ll help you keep things simple and stress-free.