The BMW Z4 (2003-09) 2DR ROADSTER 3.0I 231 SE SMG AUTO is a two-seat, open-top sports car, not a family hatchback or SUV. In the UK used-car market it offers a focused, premium-feeling alternative to daily transport, with genuine roadster appeal and a lively six-cylinder engine for enjoyable weekend drives. Mycarcheck.com has recorded 117 checks covering 53 distinct VINs, giving a useful snapshot, though not a complete census. Its data shows an average private-sale valuation of £2,500 and about 94,000 miles; average annual use is low at 3,000 miles, while cars have had around six to seven previous keepers. Best suited to two people who value open-air driving and performance over luggage space, it’s a memorable second car, not ideal for families or new drivers. Against the Audi TT and Mercedes-Benz SLK, the Z4 stands out for distinctive styling, a strong engine and involving drive; check condition and history carefully.