August 2026
What to Look for When Buying a Used Car

How to Check Car History Online Before You View
Checking a car's history online is the single most effective thing you can do before viewing a vehicle. It costs very little, takes about ten minutes, and can save you from buying a serious problem.
What an HPI Check Reveals
An HPI check is a vehicle data report that cross-references a car's registration number against multiple national databases. A full check reveals whether the car has outstanding finance registered against it, whether it has been written off and categorised by an insurer, whether it has been reported stolen, and whether the mileage history is consistent across recorded service and MOT data.
Outstanding finance is critical. Under the Consumer Credit Act 1974 provisions on title and finance, if a car is subject to a hire purchase agreement and the seller is not the legal owner, the finance company retains title to the vehicle. You could lose both the car and your money. An HPI check is the only reliable way to catch this before purchase.
Write-off categories matter too. A Category S write-off means structural damage that has been repaired; a Category N write-off means non-structural damage. Both are legal to sell but should be reflected in the price and declared upfront.
V5C Logbook and Registration Documents
The V5C is the vehicle registration document issued by the DVLA. It is not proof of ownership, but it is proof of registered keeper, and checking it carefully is non-negotiable when buying a used car.
Check that the name and address on the V5C match the seller's details. If buying privately, the seller should be the registered keeper. Check the vehicle identification number on the V5C against the VIN plate on the car, usually found on the dashboard near the windscreen and on the door frame. A mismatch is a serious red flag.
Verify that the chassis number, engine size, fuel type, and colour all align with the V5C. These details are easy to cross-reference and take under two minutes.
Watch OutNever hand over money without seeing the original V5C document. A seller who claims the logbook is "in the post" or "lost" is a reason to walk away, not to proceed on trust.
Used Car Inspection Checklist: What to Look for When Buying a Used Car
A thorough physical inspection is where most buyers either find the problems or miss them entirely. Work through this systematically rather than at random.
A person crouching beside a used car on a dealership forecourt in overcast daylight, closely inspecting the lower bodywork and wheel arch with one hand touching the metal, looking for rust or filler
Area What to Check Red Flag
Exterior panels Panel gaps, paint consistency Uneven gaps, mismatched paint sheen
Wheel arches Rust, filler, bubbling paint Soft spots when pressed
Windscreen Chips, cracks, delamination Any crack in driver's eyeline
Under bonnet Oil level, coolant, belt condition Milky oil, low coolant, cracked belts
Interior Seat wear vs. mileage, warning lights Wear inconsistent with claimed mileage
Tyres Tread depth, sidewall condition Below 3mm, uneven wear patterns
Exterior and Bodywork
Stand back from each corner of the car and look along the panels in raking light. Paint that has been resprayed often has a slightly different sheen or texture, and uneven panel gaps suggest accident repair or replacement panels. Press gently on the wheel arches and sills; filler used to cover rust will feel slightly soft compared to solid metal.
Check the windscreen carefully. A crack that runs into the driver's line of sight is an MOT failure. Look at the rubber seals around all windows and doors; cracked or lifting seals let in water and cause hidden rust.
Under the Bonnet
Pull the oil dipstick and check both the level and colour. Clean oil runs amber to dark brown; milky or grey oil suggests coolant contamination, which can indicate a head gasket problem. Check the coolant reservoir; it should be between the minimum and maximum marks and clear or slightly coloured, never rusty or oily.
Look at the cam belt or timing chain. Many manufacturers specify replacement intervals, and an overdue belt is a significant mechanical risk. Check whether the service history shows this work has been done.
Inspect the battery terminals for corrosion and look for any obvious fluid leaks around hoses and connections.
Interior and Electrical Components
The interior tells a story about how a car has been used. Seat bolster wear, a shiny steering wheel, and worn pedal rubbers on a car with low mileage are warning signs that the odometer may have been tampered with. Mileage discrepancy between the claimed figure and the wear pattern is one of the most reliable indicators of odometer tampering.
Test every electrical component: windows, mirrors, heated seats, air conditioning, infotainment, reversing camera, and all dashboard warning lights. Start the car from cold and watch for any warning lights that stay on after the engine warms up.
Pro TipBring a phone charger and test the USB ports. Faulty USB connections are a surprisingly common and expensive fix on many modern vehicles.
Test Driving a Used Car: Tips to Drive Away Confident
The test drive is your only chance to feel how the car actually behaves before you commit. Treat it as a diagnostic exercise, not a pleasure trip.
A buyer in the driver's seat of a used car on a quiet residential road, both hands on the steering wheel, looking forward with concentration during a test drive on a dry afternoon
Drive for at least 20-30 minutes and include a mix of road types: slow urban driving, a faster dual carriageway section if possible, and some tight manoeuvres. Here's what to focus on:
Cold start: Listen for rattles, tapping, or rough idling before the engine warms up. Many mechanical issues only appear when the engine is cold.
Brakes: Apply them firmly at a safe speed. The car should stop in a straight line without pulling to one side. A spongy pedal or grinding noise warrants investigation.
Clutch and transmission: On a manual, the clutch biting point should be progressive, not sudden or very high. On an automatic, gear changes should be smooth and prompt.
Steering: The wheel should feel responsive and return to centre naturally. Vibration through the wheel at speed often indicates wheel balance or tracking issues.
Electrical components: Test the air conditioning on the move. Turn off the radio and listen for rattles, squeaks, or wind noise from poorly fitted seals.
According to Which? used car buying advice, buyers who skip the test drive or shorten it significantly are far more likely to discover mechanical problems after purchase.
Choose from a reputable used car dealer with good honest reviews and a proven track record.
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