2021 NISSAN SENTRA SR XTRONIC CVT VIN 3N1AB8DV3MY256814

This entry is for a 2021 Nissan Sentra SR Xtronic CVT, finished in red. Under the bonnet is a 2.0-litre petrol engine producing 149 hp. There is a CVT gearbox, with front-wheel drive. Every figure for this car is given as it appears in the source data.

The recorded mileage is 104,837 miles. Because the clock counts miles, any figure noted in kilometres has to be converted before the two can be compared. A car that has covered this much distance for its age has worked hard, and a mechanic should judge the wear accordingly. A later figure lower than an earlier one points to a replaced instrument cluster or an odometer that has been wound back. Title paperwork often notes the mileage at each change of owner, which makes it a useful cross-check.

Primary damage in the record: front end. Whether the damage has been repaired since, and how well, is not something a damage entry can show. Whatever the cause, a diagnostic scan of the car’s electronics shows fault codes that a visual check misses.

When checked, the car could be started and driven under its own power. A key is on file for the car. A condition note describes the car at one moment; months of standing or later work on the car can change the picture in either direction.

The record shows a clean title. 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. A car’s paperwork is scattered: the registry knows about owners, the workshop about repairs and the insurance company about claims. What a car has been through is seldom visible at first glance, and a respray can make even a badly damaged car look sound.

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. Many modern petrol engines are turbocharged and direct-injected; where they are, the turbocharger and injectors belong on a specialist’s checklist. 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.

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 3N1AB8DV3MY256814. The number in the car’s documents should match the one stamped into the body and the one on the plate at the base of the windscreen.

Where entries exist, a VIN check can show changes of owner, past mileage readings, reported damage and whether the car is listed as stolen. A repair paid for in cash at a small workshop leaves no trace in any database, so no report can list it. A VIN check and a physical inspection answer different questions: the first says what happened to the car, the second what condition it is in now. The next step is to look up the history behind VIN 3N1AB8DV3MY256814.