The complete used car inspection checklist
Last updated: 19 June 2026
A step-by-step checklist to inspect a used car like a pro: bodywork, tyres, engine bay, interior, underbody, test drive and paperwork.
Before you go
Arrange to see the car in daylight, when it is clean and dry — rain and darkness hide paint defects and leaks. Ideally inspect it cold, before the engine has been warmed up, so start-up issues are easier to hear.
Bring a friend, a torch, a magnet wrapped in cloth (to check for body filler on steel panels), and your phone to photograph everything.
1. Exterior and bodywork
Check that panel gaps are even and symmetric, that paint shade and gloss match across adjacent panels, and that there is no overspray on seals or trims.
Look for rust around wheel arches, sills, door bottoms and the tailgate. Bubbling paint often means rust starting underneath.
2. Tyres and wheels
Tyres should match in brand and have even tread depth. Uneven wear across a tyre can indicate alignment or suspension problems, possibly from an impact.
Check the date code on each tyre and make sure none are cracked or older than about six years.
3. Under the hood
Look for clean, regular factory welds and untouched bolts. Check oil on the dipstick (not milky), coolant color, and for any leaks or fresh sealant.
A spotless engine bay on an older car can be normal — or an attempt to hide leaks. Look underneath after the test drive for drips.
4. Interior and electronics
Test every electrical item: windows, locks, lights, wipers, air conditioning, infotainment, heated seats and all warning lights (they should illuminate then go out).
Wear on the seat, pedals and steering wheel should match the claimed mileage. Heavy wear with low mileage is a red flag for odometer fraud.
5. Underneath the car
If you can, look under the car for rust on the chassis, fresh undercoating hiding repairs, bent or welded structural parts, and exhaust condition.
Check the spare wheel well and boot floor for ripples or welds that suggest rear-impact repair.
6. Start-up and test drive
Start the engine cold and listen for knocking, rattling or rough idle. Watch the exhaust: blue smoke means burning oil, white smoke can mean coolant.
On the road, test braking (no pulling or vibration), steering (straight, no wandering), gearbox (smooth shifts), and listen for clunks over bumps.
7. Paperwork
Match the VIN on the car to the registration and service book. Check the service history is consistent and the mileage rises logically over time.
A vehicle-history report confirms accidents, write-offs, mileage and ownership.
8. Make your decision
Add up the findings. A few minor issues are normal and great negotiation leverage; several structural or mechanical concerns justify a professional inspection or walking away.
A CarGuard AI inspection can pre-screen the bodywork and engine sound from your photos before you commit your time and money.