The 2004 BMW 5 Series is part of the model's fifth generation, recognized for its sleek design and advanced technology. The sedan comes in three trims: 525i, 530i, and 545i. The 525i and 530i both run on a 3.0-liter inline-six engine, with the latter offering more horsepower. The 545i boasts a more powerful 4.4-liter V8 engine. All trims come with a standard six-speed manual transmission, with an optional six-speed automatic. The iDrive infotainment system stands out in the 5 series, although its complexity has been a cause for criticism. Elsewhere, standard safety features include stability control, four-wheel antilock disc brakes, and a full complement of airbags.