The BMW Z4 is a rear-wheel drive sports car by the German automaker BMW, known as the E85 in roadster form and E86 in coupe form. Production started in 2002, and thus replaced the BMW Z3. The design addresses many criticisms of the Z3; the Z4 is larger, and has a significantly stiffer chassis. It was built in Spartanburg, South Carolina. Initially, the Z4 was available only as a roadster, but in 2006 a coupé version was officially launched.
The last of the Z4 line to be assembled in North America rolled off the assembly line of BMW's Spartanburg, South Carolina plant on the night of August 27, 2008. Production of the next-generation model is expected to shift to the automaker's plant in Regensburg, Germany.
The first-generation Z4 was designed by the danish BMW-designer Anders Warming. He later made the Mille Miglia Concept car with some of the same shapes as from the Z4.
The Z4 features a strut type front suspension like its predecessor, the Z3. The rear suspension, however is considerably different from that of the Z3, 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.