Buying a car

How to inspect a used car before buying: the complete checklist

In the listing photos the car looks perfect, and the description says "no accidents, full service history, one owner". Reality is often less rosy. So treat the inspection like a small investigation: check the documents, body, interior, mechanics, and always take a test drive — ideally in the order a professional inspector would follow. You don’t need to know every technical detail; you need to know where to look and what to ask. Here’s the complete checklist.

1. Documents and the VIN — start with the paperwork

Before you even look at the paint, ask for the registration document, service book, repair invoices and the OC policy. Check that the owner’s details match the person actually selling the car. Long gaps in inspections or insurance can mean the car sat unused or was driven illegally.

The VIN must match in three places: the registration document, the manufacturer’s plate, and the number stamped on the body. Differences, signs of tampering, or illegible markings are a serious red flag. The VIN also lets you check the damage history, mileage, country of origin and factory equipment — do this before you go to view the car.

2. Body and paint — inspect in daylight

View the car clean, dry and in daylight — a wet or dirty body hides faults. Walk around it and check:

• Paint shade on adjacent panels — differences suggest respraying or filler after damage.
• Panel gaps between bonnet, wings, doors and boot — uneven ones mean bodywork.
• Overspray on seals and trim — a sign of a careless repair.
• Corrosion on sills, wheel arches and lower door edges.
• Glass production dates — if one is much newer than the rest, it was replaced (normal for one; a concern for several).
• Even tyre wear — uneven wear points to alignment or suspension.

A single resprayed panel doesn’t necessarily mean a major crash — someone may have touched up a car-park scratch. What should worry you is big colour differences, poor panel fit and multiple repair marks on the same side.

3. Interior — often reveals the truth about mileage

The interior betrays real wear. Compare it with the stated mileage: a heavily worn steering wheel, rubbed pedals and seat on a "low" odometer are a classic sign of a wound-back clock. Check the electrics (windows, mirrors, air-con, sensors), central locking on all doors and boot, and the lights, including the brake light.

4. Engine — the most expensive problems hide under the bonnet

Open the bonnet (on a cold engine). Look for oil and fluid leaks, belt condition, repair traces and corrosion. Once started, listen at idle: vibration, fluctuating revs, an unusual exhaust smell or lit warning lights all call for diagnostics. Rough running can stem from ignition, intake, injection or sensors — potentially costly items.

5. Test drive — the moment of truth

Don’t settle for a few minutes on the lot. Drive both in town and on a faster stretch. Check:

• Starting, pulling away, acceleration and braking — no jerks or alarming noises.
• Manual gearbox — smooth shifts, clutch operation, bite point.
• Automatic — mode and gear changes without delay, jolts or noise.
• Handling — on a flat, safe road the car shouldn’t pull to one side.
• Suspension and bearings — listen for speed-dependent noises and on bumps.

6. A mechanic inspection — the best pre-purchase investment

If you lack technical knowledge, book a pre-purchase inspection at an independent workshop or test station. A mechanic can check the underbody on play detectors, look into hard-to-reach spots, read fault codes from the computer, and measure paint thickness — the things you won’t see in a car park. The cost is small compared with one hidden, expensive fault.

The most common mistake: deciding on emotion

An attractive price, low mileage and a tidy interior can lull your guard. Treat checking a car as a process, not a one-off: paperwork and history, then body, interior, engine and test drive. Remember too that a report doesn’t replace the inspection — no damage record doesn’t mean the car was never repaired. But a report and valuation tell you what to look for and whether the price is fair, before you drive out to view.

This material is informational. A checklist reduces risk but doesn’t give a 100% guarantee of the car’s condition — if in doubt, commission a pre-purchase inspection from a professional workshop.

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Frequently asked questions (FAQ)

What should you check when buying a used car? Check in order: documents and VIN match, body and paint (shade, gaps, corrosion, glass dates), interior (wear vs mileage), the engine at idle, a test drive in town and on the open road, and a mechanic inspection. The biggest red flag is inconsistency between the documents, the condition and what the seller says.

How do you check if a car has been in an accident? Inspect the paint in daylight: shade differences, uneven panel gaps and overspray on seals suggest bodywork. A paint-thickness gauge at a mechanic and a VIN history report also help. A single painted panel is often minor; multiple marks on one side are a bigger concern.

Is it worth taking a mechanic to inspect a car? Yes. A pre-purchase inspection at a workshop or test station assesses the underbody, suspension and parts invisible in a car park, and reads fault codes from the computer. Its cost is small against the risk of one expensive hidden fault.

What should a test drive involve? It should cover both the city and a faster stretch, not a few minutes on the lot. Check starting, acceleration, braking, gearbox and clutch operation, whether the car pulls on a straight road, and suspension and bearing noises over bumps.