The BMW Z4 (2009-13) SDRIVE23I 2DR ROADSTER 2.5 204 EU5 AUTO is a two-seat convertible aimed at drivers wanting an enjoyable open-top car rather than family transport. In the UK used-car market it sits among premium roadsters, offering BMW badge appeal and a more focused feel than hatchbacks or small convertibles. Mycarcheck.com records 448 look-ups across 186 different VINs, a useful sample of buyer interest. Checks show an average private-sale value of £6,900 and recorded mileage of 71,000; typical annual mileage is just 3,000. With nearly four previous keepers on average, check each car’s history and condition carefully before buying one. The sDrive23i suits couples and enthusiasts seeking weekend drives or touring, but its two seats limit family practicality. Its petrol engine offers smooth, lively performance, while the folding roof brings open-air appeal. Against rivals such as the Audi TT Roadster, the Z4 is known for comfort and balanced, reassuring handling.