Most used-car guides concentrate on the paperwork and the walkaround. The test drive is where you learn how the car behaves — and it is the part buyers rush. This is the road-test companion to our car check before you buy and used car buying checklist pages. Work through it in order, on the same car, before you discuss price.

Safety first. Only carry out driving checks where it is legal and safe to do so, and keep to the speed limit at all times. You do not need to drive fast to assess a car. If you notice a severe fault — braking that pulls or fails to slow the car, vague or heavy steering, a warning light that stays on, smoke, or a strong burning smell — stop as soon as it is safe and end the test drive. Do not continue to “see if it clears”.

Before you set off

  • Ask the seller not to warm the engine beforehand. A cold start tells you more.
  • Check tyre pressures and look at tread across each tyre, not just the outer edge.
  • Confirm the registration on the car matches the V5C and the number plates.
  • Note the mileage and compare it with the MOT history you looked up before travelling.
  • Make sure you are insured to drive it. If you are relying on your own policy, confirm it covers a vehicle you do not own.

Starting from cold

Listen at start-up. A brief rattle that disappears is different from a noise that stays. Watch for smoke from the exhaust: blue-grey haze can point to oil being burned, while heavy white smoke on a warm day is worth questioning. Let the car idle for a minute and check that the revs settle rather than hunt. With the car stationary, switch on the heater, air conditioning, lights and rear demister and confirm each works.

On the move: low speed

  • Pull away gently and feel for judder through the clutch or, in an automatic, a thump between gears.
  • Brake softly from walking pace. Listen for grinding or scraping and feel for pulling to one side.
  • Turn the wheel from lock to lock while moving slowly. Knocking over bumps can indicate worn suspension; a whine that rises with speed can point to a wheel bearing.
  • On a quiet, legal stretch, let the car roll with your hands light on the wheel. It should track straight, not drift.

At legal road speeds

Where the road and conditions allow, build up to the posted limit and hold a steady speed. Check for vibration through the wheel or seat, which often means wheel balance or a tyre issue. Listen for wind noise around the doors and windows, which can indicate damaged seals or a previous repair. Stay within the limit and keep your attention on the road; there is no need to test acceleration to assess a car you may buy.

Gearbox, clutch and brakes

In a manual, change up and down through every gear, including reverse, at sensible road speeds. The change should be positive without crunching. In an automatic, watch for delayed engagement or harsh shifts when cold and when warm. After a few minutes, stop somewhere safe and smell the air around the wheels; a strong burning smell can mean a binding brake or a slipping clutch.

After the drive

  • Let the engine idle for a minute, then switch off and check for fresh drips under the car.
  • Check the oil level on the dipstick and look for a milky appearance. Check other fluids only as the manufacturer’s handbook describes, with the engine off and cool where specified.
  • Never open the coolant cap while the engine is hot. Pressurised coolant can scald; wait until the engine is cold and follow the handbook.
  • Recheck the dashboard: warning lights that were absent before the drive should still be absent.
  • Ask when the cambelt or chain was last changed and for evidence, not just a verbal answer.
  • Confirm the service record, MOT certificates and any repair invoices match the car and the mileage you have seen.

Documents and history before you agree a price

A good drive does not cancel out a poor history. Before you commit, run a vehicle check that covers outstanding finance, write-off markers, theft and mileage anomalies, and read the MOT history for recurring advisories. Our outstanding finance check and MOT history check pages explain what each result means.

Two document points are easy to get wrong. First, the registered keeper is not proof of ownership — the V5C records who is responsible for the vehicle, not who owns it. Second, a car offered by a trader may not be registered to that trader; stock is often held on trade terms or sale-or-return, so the keeper details can differ from the seller. Ask the seller to explain any mismatch and get the receipt and warranty terms in writing.

When to walk away

Some findings are bargaining points and some are reasons to stop. Persistent warning lights, a gearbox that will not engage cleanly, evidence of a serious impact repair, or a history that does not match the car are all worth taking seriously. If a fault makes the car unsafe to drive, end the test and do not agree a price on the day.

Official sources for the checks above

Use this checklist alongside the paperwork, not instead of it, and keep a note of what you observed. A short written record makes it easier to decide calmly — and to explain your offer.