The BMW Z4 is a 2-door, rear wheel drive roadster. The Z4 began production in 2003, and replaced the BMW Z3. The design addresses many criticisms of the Z3; the Z4 is larger, more powerful, and has a significantly stiffer chassis.
The BMW Z4 was designed by Chris Bangle and began the controversy over his "flame surfacing" design and aggressive styling choices, which can also be seen on modern BMW 7-Series and BMW 5-Series cars.
While the Z4’s front suspension is essentially the same as the Z3’s, the rear suspension is considerably different from its predecessor’s, which was based on that of the E30 BMW 3-Series. Instead of a semi-trailing arm suspension, the Z4 uses a more advanced Multi-link suspension.
An BMW M Roadster version will be offered in 2006.