The BMW 5 SERIES (2003-07) 520D 4DR SALOON 2.0 M SPORT AUTO is a premium four-door saloon, offering space and comfort as an alternative to family hatchbacks and SUVs. In the UK used-car market, it brings executive-car style and comfort within reach at an older-car price, while M Sport trim adds a purposeful, sporty appearance. mycarcheck.com recorded 564 checks across 191 distinct VINs, a useful sample for this model. Its average private-sale valuation was £1,700, with average recorded mileage of 144,000 and annual use of 10,000 miles. Cars checked had averaged about six previous keepers, so condition and service history deserve close attention. With its diesel engine and automatic gearbox, this 520d suits commuters, longer-distance drivers and small families seeking a comfortable daily car. It is more composed and premium-feeling than many mainstream saloons, while still offering economy for its size. Choose one after careful checks: age and mileage make upkeep especially important.