The BMW 5 SERIES (2003-07) 525D 4DR SALOON 2.5D SE AUTO is a premium four-door diesel saloon, aimed at drivers wanting more space and comfort than a family hatchback. In the UK used-car market, it sits among executive cars, traditionally competing with the Mercedes-Benz E-Class and Audi A6. Interest in this version is well represented in mycarcheck.com checks: 1,779 look-ups covered 724 VINs. The data records an average private-sale value of £1,500, latest mileage averaging 153,000 miles and yearly mileage around 8,000. Vehicles checked had about 6.6 previous keepers on average, so review each car’s history carefully. With a roomy cabin, relaxed motorway manners and strong diesel performance, the 525d suits commuters, couples and families travelling longer distances. SE trim brings a comfortable, well-equipped feel, while the automatic gearbox helps in traffic. Against newer rivals, age and mileage matter: check maintenance records, condition and running costs before buying this car.