The BMW Z4 (2003-09) 2DR ROADSTER 3.0I 231 is a two-seat convertible sports car, not a hatchback or family vehicle. In the UK used market, it offers an attainable route into premium-badged open-top motoring. Mycarcheck.com has recorded 677 checks covering 299 distinct VINs, giving a meaningful snapshot of cars shoppers have considered. With two seats and limited luggage room, it suits couples and enthusiasts, not families. The 3.0-litre engine feels brisk and smooth, while its folding roof and bold design give it classic roadster appeal. It is more focused than many small convertibles. Check data suggests these cars are often well-used: average recorded mileage is 104,000, while average annual mileage is low at 3,000. The average private-sale valuation is £2,200, and cars have averaged just over six previous keepers. These figures describe checked vehicles, not every Z4, so inspect condition and history carefully; maintenance can matter more than mileage alone.