2016 INFINITI QX60 VIN 5N1AL0MM7GC510245

The Infiniti QX60 described here left the factory in 2016. The petrol engine has six cylinders and produces 265 hp. There is an automatic gearbox, with four-wheel drive. Every figure for this car is given as it appears in the source data.

The clock stood at 230,982 miles when the data was entered. A clock converted from miles to kilometres should be documented, since the swap can hide the true mileage. A car that has covered this much distance for its age has worked hard, and a mechanic should judge the wear accordingly. A single figure proves little: what makes a mileage believable is a series of readings that rise steadily over the years. Service invoices and inspection reports each carry a mileage figure, and lined up in order they show whether the clock tells the truth.

No damage type appears in the source data; that shows what was entered, not what the car has been through. Water marks under the carpets, rust in unusual places or a panel in a slightly different shade would point to damage nobody ever entered.

When it was checked, the car could not be driven. The engine could not be started. No key is recorded with the car, and a replacement has to be coded to the immobiliser. Months of standing can leave a car with seized brakes and perished tyres.

A salvage title is on file for this car. A title like this is issued when repair was judged uneconomical or unsafe. Once issued, a branded title stays with the VIN for good, and it affects registration and insurance for every later owner.

Behind every used car lies a string of events: who owned it and for how long, what the inspections found and which repairs and claims were made. 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.

When a car does not run, a compression test and the condition of the oil tell a mechanic whether the engine can be brought back to life. On a petrol engine, spark plugs, ignition coils and the cooling system are the routine items a service history should cover. On a car that does not run, the automatic gearbox cannot be judged on the road; the colour and smell of its fluid and a diagnostic scan give the first clues. A car with four-wheel drive has extra differentials and often a transfer case, which an inspection should cover alongside the engine and gearbox.

A vehicle identification number has 17 characters: the first three name the manufacturer, the next six describe the model and its specification, and the last eight identify the individual car. This car’s identification number is 5N1AL0MM7GC510245. 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.

Depending on what is on file, a VIN report may include past registrations, mileage readings, damage entries, branded titles and theft checks. Paperwork is only as complete as the people who kept it, so a report with few entries lowers the risk without removing 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 5N1AL0MM7GC510245.