10 Common Issues Found in Used Cars

10 Common Issues Found in Used Cars

Buying a used car can be a great decision, especially when you're looking to save money while still getting a reliable vehicle. However, not all used cars are created equal, and even those with low kilometres and a clean history may have hidden problems. That’s why knowing what to look for is crucial. Here are 10 common issues often found in used cars that buyers should keep an eye out for during the inspection process.

Understanding the Importance of Used Car Inspections

A proper vehicle inspection is one of the most important steps when buying a used car. It helps you uncover underlying issues that could cost you later on. Some problems may not show immediate symptoms, but they can lead to expensive repairs or safety risks if not addressed early.

Used car inspections go beyond a simple visual check. They include examining key mechanical systems, checking fluids, assessing tyre condition, and taking the car for a test drive. Whether you’re checking the vehicle yourself or bringing in a mechanic, a thorough inspection gives you the confidence to make an informed purchase decision.

1. Worn Brake Components

Brakes are one of the most vital safety systems in any vehicle, and they're also among the most frequently worn components. Common issues include thin brake pads, grooved rotors, or low brake fluid.

When inspecting a used car, pay attention to squeaking or grinding noises during braking, a spongy or stiff brake pedal, or vibrations when slowing down. These are all signs that the braking system may need immediate attention.

Regular brake servicing is essential, and replacing pads or rotors isn’t overly expensive, but ignoring these issues can lead to more significant problems down the road.

2. Tyre Damage or Uneven Wear

Tyres can tell you a lot about a car’s history and how well it's been maintained. Uneven tyre wear may indicate poor alignment, suspension issues, or inconsistent tyre rotation.

Look for bald spots, cracks in the rubber, bulges, or low tread depth. Also, check that all tyres are the same brand and size, and that a spare tyre (in good condition) is included. Tyres with uneven wear can reduce handling performance, increase fuel consumption, and potentially lead to blowouts.

3. Engine Oil Leaks

Engine oil leaks are a common issue for those cars that haven’t been serviced regularly, especially in older vehicles. Leaks can occur around the valve cover gasket, oil pan, or oil filter.

Check for oil spots under the parked car or wet areas around the engine. Also, inspect the dipstick; low or dirty oil can be a red flag. Even small leaks can escalate over time, potentially damaging the engine and increasing repair costs.

4. Transmission Issues

Transmission repairs can be among the most expensive for any vehicle. In used cars, you’ll want to watch for symptoms such as delayed engagement when shifting gears, jerking, slipping, or clunking noises.

During a test drive, observe how the vehicle shifts in both low and high gears. If the car struggles to change gears or makes unusual sounds, have it inspected immediately. Transmission fluid should be clean and pinkish in colour, dark or burnt-smelling fluid is a warning sign.

5. Battery Wear or Corrosion

Car batteries typically last between three to five years. Signs of battery trouble include corroded terminals, slow engine cranking, or dashboard warning lights.

When inspecting a used car, look under the bonnet for any signs of leakage or buildup on the battery posts. A weak battery can result in starting issues and electrical malfunctions. It's also a good idea to check the vehicle’s age and see if the battery is due for replacement soon.

6. Suspension Problems

A vehicle’s suspension system ensures a smooth ride and proper road handling. Common issues include worn shock absorbers, broken struts, or damaged bushings.

Listen for rattles, clunks, or squeaks when driving over bumps. If the car bounces excessively after pressing down on the bonnet or boot, the suspension may be worn. Uneven tyre wear can also be a symptom. Neglected suspension systems can lead to reduced driving comfort and handling control.

7. Faulty Electrical Systems

From power windows and central locking to infotainment and dashboard controls, modern vehicles depend heavily on electronics. In used cars, faulty wiring, dead sensors, or broken switches are not uncommon.

Test everything, such as windows, lights, air conditioning, audio systems, and all dashboard indicators. Electrical issues can be complex and expensive to repair, especially if they involve the car’s computer or integrated safety systems.

8. Exhaust System Damage

The exhaust system plays a critical role in emissions control and noise reduction. Damage can come in the form of rust, holes, or loose connections.

Check for visible rust or black soot around the exhaust pipe. Listen for loud exhaust noises, which could mean a broken muffler or a hole in the exhaust system. These problems not only increase noise but may also impact performance and fuel economy.

9. Cooling System Failures

A properly functioning cooling system keeps your engine at the right temperature. Cooling system issues like leaking hoses, a cracked radiator, or a malfunctioning thermostat can lead to overheating.

During inspection, check the coolant level and look for any dried residue that might indicate past leaks. An overheating engine can cause severe damage, including head gasket failure or a warped engine block.

10. Steering Issues

Steering problems can pose a major safety concern. Signs include difficulty turning the wheel, knocking noises when steering, or a vehicle that pulls to one side.

Inspect for power steering fluid leaks, worn tie rods, or issues with the steering column. Test drive the car on both straight and curved roads to see how it handles under different conditions. Smooth and responsive steering is essential for safe driving.

Pro Tip: Use a Checklist During the Inspection

When buying a used car, bring an inspection checklist with you to make sure you cover all the important points. Start with the exterior, check the body, tyres, glass, and lights. Move on to the interior, test all electronics, comfort features, and seats. Then look under the bonnet for fluid levels, leaks, and corrosion.

Take the car for a test drive to assess how it accelerates, brakes, and handles. Don’t rush and take your time, and ask questions. A well-organised checklist ensures you don’t overlook potential red flags. And if you’re unsure about anything, don’t hesitate to bring in a trusted mechanic.

Inspect with Confidence at Patrick Auto Group

If you’re shopping for a used car in Port Macquarie, Patrick Auto Group is the place to start. We offer an extensive selection of thoroughly inspected used vehicles across all styles, from city hatches and utes to family SUVs and performance models.

Each vehicle undergoes a comprehensive mechanical and safety check by our trained technicians. We stand by the quality of our vehicles and are happy to walk you through the inspection process for complete transparency.

With over 25 years of service to the Mid North Coast, our team is here to help you find the perfect vehicle, without surprises. Visit or contact Patrick Auto Group today and inspect with confidence. Let’s get you on the road in a vehicle you can trust.