2006 CADILLAC DTS STANDARD VIN 1G6KD57Y96U239685

This record covers a 2006 Cadillac DTS Standard. Power comes from a 4.6-litre petrol engine with eight cylinders. Power reaches the wheels through an automatic gearbox.

The car was recorded with 158,946 miles on the clock. The figure is in miles and needs converting before it is compared with kilometres: one mile is about 1.6 km. Services and inspections note the distance covered, so a car with an ordinary past builds up a trail of figures that climb year after year. Title paperwork often notes the mileage at each change of owner, which makes it a useful cross-check.

No damage entry is on file for this car, and the bodywork still needs checking in person. Water marks under the carpets, rust in unusual places or a panel in a slightly different shade would point to damage nobody ever entered.

A key is on file for the car. Months of standing can leave a car with seized brakes and perished tyres.

A clean title is on file for this car. With a clean title the car can be registered and insured in the usual way.

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. What a car has been through is seldom visible at first glance, and a respray can make even a badly damaged car look sound.

Many modern petrol engines are turbocharged and direct-injected; where they are, the turbocharger and injectors belong on a specialist’s checklist. The automatic gearbox needs its fluid changed at the manufacturer’s intervals, and invoices should show that it was.

The ninth character of the VIN is a check digit calculated from the other sixteen, so a mistyped or invented number does not add up. This car’s identification number is 1G6KD57Y96U239685.

What a history report can list depends on what has been documented about the car: registrations, mileage readings, damage, branded titles and theft reports. A repair paid for in cash at a small workshop leaves no trace in any database, so no report can list it. A history report says nothing about the car’s present condition: the frame, corrosion, electrics and the quality of any repair are judged on a lift by a mechanic. The next step is to look up the history behind VIN 1G6KD57Y96U239685.