The Z4 is a small rear-wheel-drive convertible with seating for two. Now in its third generation, the Z4 wears more refined styling and offers a slick hardtop convertible to broaden its appeal. The Z4 sDrive30i features a 3.0L inline six cylinder engines rated at 255-bhp mated to six-speed manual and automatic transmissions. The higher performance sDrive35i model features a turbocharged 3.0L six rated at 300-bhp and offers a 7-speed sequential manual in lieu of standard automatic transmission. The Z4 Roadster is manufactured in the U.S. in South Carolina.

The Z4 adds a higher performance model for 2011. The Z4 sDrive 35is features a 335-bhp turbocharged six coupled to a 7-speed double clutch transmission.