2012 BUICK REGAL VIN 2G4GR5EK1C9140267

The Buick Regal described here left the factory in 2012. Power reaches the wheels through an automatic gearbox. Power comes from a 2.4-litre petrol engine with four cylinders.

Turning back an odometer takes little skill and leaves no visible trace, which is why earlier figures matter more than the display. Older figures usually turn up on service invoices, inspection reports and past title paperwork.

When the car was recorded, it showed front-end damage. A damage entry is a starting point for the inspection, telling the mechanic where to look first. A lift and a diagnostic check show what photos cannot: bent brackets behind a panel, chafed wiring or deployed airbags.

A key was present. Condition notes are a snapshot: the car may have been worked on, stripped of parts or left standing since.

A car’s history is the sum of what has happened to it since it was new, and most of it has left a trace on paper somewhere. The paperwork is kept by different bodies – registries, workshops, insurance companies and lenders – so the history of one car is spread across many places. From the outside, a car with a repaired accident and a car without one can look identical.

A cold start, the colour of the exhaust smoke and any oil leaks tell a mechanic a good deal about how an engine has been treated. On a petrol engine, spark plugs, ignition coils and the cooling system are the routine items a service history should cover. Automatic transmissions, CVTs included, are expensive to repair, so the test drive should include pulling away from a standstill and a stretch at motorway speed.

A VIN never contains the letters I, O or Q, which could be mistaken for digits; its 17 characters identify the maker, the model and the individual car. The VIN of this Buick Regal is 2G4GR5EK1C9140267. Scratches, fresh paint or a replaced plate around the VIN markings are warning signs in their own right.

Depending on what is on file, a VIN report may include past registrations, mileage readings, damage entries, branded titles and theft checks. However complete the paperwork, only an inspection shows the condition of the body, suspension, brakes and electrics today. A history check on VIN 2G4GR5EK1C9140267 is the place to start.