The 2003 BMW Z4, part of the car's first generation, is a luxury sports car that defines the blend of sportiness and elegance. The Z4 has two trims - the 2.5i, and the 3.0i. The 2.5i comes with a 2.5-liter inline six-cylinder engine, producing 184 horsepower while the 3.0i features a more potent 3.0-liter inline-six that propels 225 horsepower. Both trims pair with a manual 5-speed transmission as standard while an automatic 5-speed is optional. Standard key features include anti-lock brakes, stability control, and traction control systems. The Z4 also impresses with its entertainment system, featuring a CD player and a powerful 10-speaker sound system as standard. The 3.0i trim enjoys a more premium sound system with an upgraded Carver technology.