Used Car Test Drive Checklist: What to Check Before You Buy

Summary

• Drive for at least 20 minutes on different roads: Include town, A-roads, and hills if possible.
• Check cold start behaviour: Visit when the car hasn't been warmed up. Cold starts reveal engine problems.
• Trust your instincts: If something feels wrong, it probably is. Walk away.

A test drive is your best opportunity to spot problems before you buy. Here's a comprehensive checklist to make sure you don't miss anything.

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Before You Drive

Cold Start Check

Arrive early and ask the seller not to start the car before you get there. A cold start reveals problems that disappear once the engine warms up:

• Blue smoke from the exhaust: Burning oil. Could mean worn piston rings or valve stem seals
• White smoke (not steam): Possible head gasket failure. Expensive to fix
• Rough idle: Engine shaking or uneven running when cold
• Warning lights: Note any that come on and don't go off
• Unusual noises: Tapping, knocking, or grinding from the engine

Exterior Inspection

• Check all panels for colour mismatches (indicates previous repair or accident)
• Run your hand along panels to feel for filler
• Check tyre condition and brand: Mismatched or budget tyres suggest the owner cut corners
• Look under the car for oil leaks or rust
• Check all lights work

Interior Check

• Does the mileage match the wear? A "low mileage" car with a worn steering wheel and pedal rubbers is suspicious
• Check all electrics: Windows, mirrors, central locking, air con, heated seats, infotainment
• Sniff for damp or mould: Could mean water leaks or flood damage
• Check the boot floor and spare wheel well for water

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During the Test Drive

Engine and Gearbox

• Smooth acceleration: Any hesitation, misfiring, or flat spots?
• Gear changes: Manual — is the clutch biting high? Does it crunch? Automatic — are changes smooth?
• Rev counter: Does the engine rev freely through the range?
• Power delivery: Does it feel right for the engine size?

Brakes

• Pull to one side? Could mean uneven brake wear or a sticking caliper
• Pedal feel: Spongy brakes could mean air in the lines or worn pads
• Noises: Squealing or grinding suggests worn pads or discs
• ABS: Test on a quiet road at low speed. The pedal should pulse when ABS activates

Steering and Suspension

• Straight-line driving: Does the car pull to one side? Could be alignment or tyre issues
• Bumps and potholes: Listen for clunks or rattles from the suspension
• Steering response: Should be smooth with no dead spots or excessive play
• Cornering: Any wallowing, rolling, or instability?

Noise

• Wind noise: Excessive noise could mean damaged door seals
• Road noise: Some is normal, but excessive noise suggests worn tyres or wheel bearings
• Engine noise: Listen for knocking, tapping, or whining at different speeds

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After the Test Drive

• Check under the bonnet again: Look for any new leaks or steam
• Check the exhaust: Run a white tissue around the inside of the exhaust pipe. Black soot is normal. Oily residue is not
• Check the coolant: If it's brown or oily, there could be a head gasket problem
• Review warning lights: Are there any still on?

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Red Flags — Walk Away If...

• The seller won't let you test drive it
• The car has been "warmed up" before you arrive
• There's blue or white smoke from the exhaust
• The engine oil is milky (head gasket failure)
• VIN doesn't match the V5C
• The seller is evasive about the car's history
• The price seems too good to be true

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