The BMW 5 SERIES (2003-07) 520I 4DR SALOON 2.2 SE is a roomy, premium executive saloon: a four-door car aimed above family hatchbacks and below luxury limousines. It suits drivers wanting comfort and presence for journeys, commuting and longer motorway trips, with space for passengers and luggage and weekend outings. In mycarcheck.com checks, this model recorded 589 look-ups across 224 distinct VINs, a useful sample of interest rather than a measure of every car on the road. The average private-sale valuation was £1,200, while checked cars averaged 123,000 miles, 8,000 miles annually and around seven previous keepers in the data. Its appeal is the composed, comfortable feel and understated styling, offering a more engaging drive than many mainstream saloons while rivaling contemporary Audi A6 and Mercedes-Benz E-Class models. As a used BMW, condition and service history matter; it is best for buyers prioritising comfort and refinement over low running costs.