The BMW Z4 is a two-door, rear-wheel-drive sports car available as a roadster convertible and coupe. The Z4 roadster replaced the Z3 for 2003, while the Z4 coupe joined the lineup for 2006. The Z3 was the first of a new wave of German roadsters to be introduced in early 1996, and the first BMW roadster to be sold in America since 1959, when the hoary 507 was discontinued. While the Z4 roadster comes in two trims: 3.0i and 3.0si, the Z4 coupe only has a single trim: the 3.0si. The basic warranty...
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