2009 BMW 750 I VIN WBAKA83529CY33786

The BMW 750 I described here left the factory in 2009. The drivetrain combines an automatic gearbox with rear-wheel drive. Power comes from a 4.4-litre petrol engine with eight cylinders. Every figure for this car is given as it appears in the source data.

The record gives the mileage as 143,975 miles. The figure is in miles and needs converting before it is compared with kilometres: one mile is about 1.6 km. 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.

Primary damage in the record: side. A damage entry is a starting point for the inspection, telling the mechanic where to look first. With side damage on file, the inspection should start with the door pillars, the sills and the side airbags.

A key was there when the car was checked.

The car carries a salvage title. A title of this kind usually means the car was written off as a total loss after damage. Once issued, a branded title stays with the VIN for good, and it affects registration and insurance for every later owner.

A car’s history is everything logged against it since it left the factory: registrations and owners, inspections, repairs and insurance claims. Pieces of a car’s history sit with registries, dealers, workshops and insurance companies, and none of them sees the whole picture. 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. 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.

Every modern car carries a 17-character VIN, and no two cars share one. The VIN on file for this car is WBAKA83529CY33786. A VIN that differs between the documents and the car, or shows signs of tampering, is reason enough to walk away.

A VIN report gathers what different sources know about a car, such as the number of owners, mileage readings, damage and any branded title. 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. Look up the history of VIN WBAKA83529CY33786 first, and let what it shows guide the inspection.