The BMW 5 SERIES (2003-07) 523I 4DR SALOON 2.5 SPORT AUTO is a spacious, executive-class four-door saloon, aimed at buyers wanting more comfort and refinement than a mainstream family car. In the UK used market, it sits above smaller BMW saloons and rivals such as the Mercedes-Benz E-Class and Audi A6. mycarcheck.com has recorded 70 checks covering 28 distinct VINs, a useful snapshot of interest in this older model. Checks show an average private-sale value of £1,500 and average recorded mileage of 119,000 miles; typical annual mileage is 5,000. The average keeper count is around six and a half, so individual histories deserve close attention. The automatic petrol saloon suits commuting, longer journeys and families who value a composed ride over low running costs. Its roomy cabin and premium feel remain appealing, while age and fuel use make condition and maintenance important. It is a more upmarket alternative to family saloons.