A used car can be a genuinely better buy than a new one, but only if you know what to look at. Work through these seven checks in order and you will catch almost every expensive surprise before you hand over any money.

Match the VIN

The number on the dashboard, the door jamb sticker and the title must all agree. Any mismatch means walk away — it is the single clearest sign of a car that has been rebuilt from parts or is not what the seller claims.

If the seller has an explanation for why three VINs disagree, the explanation is the problem.

Read the history report properly

Do not stop at no accidents. Read the detail:

  • how many owners, and how long each kept it
  • the gaps between service entries
  • whether the mileage climbs steadily year on year
  • whether it was ever registered commercially

A car that did 30,000 miles in one year and 2,000 in the next was probably a fleet vehicle.

Look for flood damage

Lift the carpet in the footwells and the boot, and smell for damp. Silt in the seat rails, fogged headlights and rust on unpainted bolts under the dashboard all point the same way. Flood cars run fine for months, then fail electrically for years.

Check panel gaps and paint depth

Stand at the corner of the car and sight down each side. Gaps that vary, or paint that looks slightly different in daylight, mean bodywork. That is not automatically a problem, but it should be disclosed and reflected in the price.

Start the engine cold

A seller who has already warmed the car up may be hiding a rattle on start-up or a puff of blue smoke. Ask to arrive before they run it.

Drive it the way you will use it

Ten minutes around the block tells you very little. Get it to freeway speed, brake firmly once from 60, and take a rough road to hear the suspension.

Get an independent inspection

Any seller who refuses one has told you everything you need to know. At VietAuto every car has already passed a 175-point inspection and you are welcome to bring your own mechanic anyway.