The BMW Z4 (2003-09) 2DR ROADSTER 2.0I 150 SPORT is a two-seat, open-top 2.0-litre petrol sports car, not a family hatchback or SUV. In the UK used-car market it suits buyers wanting stylish, engaging weekend motoring, with Sport trim giving this entry-level Z4 a purposeful character. Mycarcheck.com records 1,855 look-ups covering 732 different VINs, a substantial sample of interest in this model. Checks show an average private-sale valuation of £3,000 and average recorded mileage of 92,000 miles; typical annual mileage is 3,000. The average car has had nearly six previous keepers, so condition and service history deserve careful attention. Unlike roadsters such as the Mazda MX-5, the Z4 feels substantial and brings premium-brand appeal, while its two seats and luggage space make it less suited to family duties. It is best for drivers who value rewarding drive and open-air cruising; check roof operation, maintenance records and condition before buying.