ABS and ESC standard. Side air bags standard.
New for 2003, the Z4 replaces the Z3 roadster. The Z3 was popular for its looks but the handling was never extraordinary. In fact, the four-seat 3-Series convertible was always more fun to drive and obviously more practical all around. The Z4, borrowing the 3-Series' excellent rear suspension, promises to improve on the Z3. A roomier cockpit also rectifies the Z3's tight cabin. The two inline six-cylinder engines from the previous version power the new one; they include a punchy 184-hp 2.5-liter and a muscular 225-hp 3.0-liter. Electronic stability control and traction control are both standard. Luggage space is also improved.