Used Car Checklist: What to Inspect Before Buying in Thailand

Three things sink used car purchases in Thailand more often than anything mechanical: a registration book that does not match the car, flood damage cleaned up rather than repaired, and air conditioning that cannot cope with 35 degrees in traffic. Check those three first and you have filtered out most of the bad cars before you open the bonnet.

Work through this standing next to the car, in daylight, with the engine cold. Allow an hour. If a seller cannot give you an hour, they are not selling you a car you want.

• Registration book colourBlue for a car
• Do firstChassis and engine numbers against the blue book
• The Thailand-specific checkFlood damage — spare wheel well and seat belts
• Worth paying forAn independent workshop inspection before you commit

Before you go

• Ask by message whether the blue registration book is present and in the seller's own name
• Ask whether a finance company is recorded as title holder
• Ask the year of first registration — it tells you whether the car is in the annual test regime
• Research the model and year on the Thai classified portals
• Arrange daylight, dry weather and a cold engine
• Bring a torch, a cloth-wrapped magnet, a phone camera and something to kneel on
• Decide in advance which independent workshop you would use

The blue book, before the car

• The name in the book is the seller, confirmed against their identification
• No finance company as title holder — if there is, they cannot transfer it to you
• Chassis (VIN) number in the book matches the car, digit for digit
• Engine number matches the engine
• Plate number, make, model, body type, colour, engine size and fuel type all match
• Date of first registration — is the car past seven years old?
• Annual tax history: up to date, or how many years outstanding
• Number of previous keepers, and how quickly ownership turned over
• Which province issued the plates

The Thai logbook explained covers what every field means. On a car the chassis number is usually visible at the base of the windscreen and on a plate in the door shut or engine bay; check more than one location and make sure they agree with each other as well as with the book. See avoiding a stolen or cloned vehicle.

Flood damage

This is the Thailand-specific check, and the one that costs people most. A submerged car can be cleaned, dried, re-carpeted and sold, and its electrical faults emerge over the following two years. Corrosion, once started under a carpet, does not stop.

• Lift the boot floor: silt, a tide line, or rust in the spare wheel well of an otherwise tidy car
• Pull each seat belt out to the stop and look for a dirt line or discolouration on the webbing
• Lift the footwell carpets; feel the underlay for damp; look for rust on the floor pan
• Rust on seat rails, seat-belt anchor bolts and the brackets under the dashboard
• Corrosion or green oxide on connector pins and earth points in the engine bay
• Condensation or a water line inside headlight and tail-light units
• A musty smell, or a very strong air freshener with no other reason for it
• New carpet, headlining or trim in an otherwise well-worn car
• Every electrical item in turn: windows, mirrors, locking, stereo, lights, wipers, seat motors

Body, paint and accident repair

• Walk round twice from a few metres back, looking down each side for ripples in the reflections
• Panel gaps even on both sides, especially bonnet, boot and doors
• Paint colour and texture matching between panels; overspray on seals or in door shuts
• Run the cloth-wrapped magnet along the lower panels — where it will not stick, there is filler
• Under the car: sills and chassis rails for kinks, welds or patches of fresh underseal
• Strut tops and inner wings for creases or replaced bolts
• Glass usually carries a matching maker's mark and date code on every pane; an odd one out is a replacement
• Rust around the rear wheel arches, tailgate and door bottoms

Engine and mechanicals, cold

• Start it cold, from a distance, and watch the exhaust for the first ten seconds — blue means oil, white that persists means coolant
• Oil on the dipstick: level, colour, and no milky emulsion under the filler cap
• Coolant in the expansion tank: clean, at level, no oil film on the surface
• Brake fluid level and colour; power steering fluid; automatic transmission fluid if the car has a dipstick for it
• Leaks, drips or a wet film on the sump, gearbox, drive shafts and suspension struts
• Belts and hoses for cracking; the heat here is hard on rubber
• Battery terminals and the date on the battery
• Listen at idle for tapping, rattling or a rhythmic knock

Air conditioning — a serious test, not a formality

In Thailand a car with weak air conditioning is a car you will not want to drive. Run it for ten minutes rather than thirty seconds, at idle and at road speed. It should blow genuinely cold from every vent, the fan should work on all speeds, and the compressor should cut in and out without a clunk. A system that is merely "cool" needs work, and a compressor is not a cheap part.

Tyres, brakes and suspension

• Tread depth on all four and the spare, across the width of each tyre
• Four-digit date codes on the sidewalls — sun and heat age tyres faster than mileage does
• Uneven wear means alignment or suspension trouble, and is a negotiating point
• Sidewall cracking, bulges, or a mismatched set of four brands
• Push hard on each corner — the car should rebound once, not bounce
• Through the wheels, check the disc faces for deep scoring or a pronounced lip
• Handbrake holds the car on a slope

The test drive

• At least fifteen minutes, including a stretch at 80–100 km/h if you can find one safely
• Steering straight with a light grip; no pull, no vibration at speed
• Brake firmly once on a clear road — straight, no judder, no pulling
• Automatic: smooth changes, no flare between ratios, no clunk into drive or reverse
• Manual: clutch bites early enough, no slipping under load uphill
• Speed bumps and rough surfaces — listen for suspension knocks
• Check the dashboard again at the end; lights that appear only when hot are common
• Park, idle for five minutes, then look underneath for anything new on the ground

Age, tax and the annual test

Ask when the car last passed and ask to see the certificate. A car due for its test in a fortnight is a car whose brakes, lights, emissions and headlight aim are about to be measured — a reasonable moment to negotiate. What fails a Thai vehicle inspection lists the faults that cause a refusal.

Deal-breakers

1. No blue book, or a name in it that is not the seller's
2. Chassis or engine number mismatched, missing or tampered with
3. A finance company recorded as title holder
4. Clear evidence of flood immersion
5. Structural repair to the chassis rails or the front strut towers
6. A seller who will not allow an independent inspection

Everything else is price. When you are satisfied, do the transfer promptly — transferring vehicle ownership at the DLT explains the visit, and the wider purchase guide is buying a used car in Thailand.

Frequently asked questions