The 2001 BMW 5 Series, part of the fourth generation (E39) launched in 1997, is a luxury sedan boasting BMW's renowned build quality and ride dynamics. The sedan options encompass the 525i, 530i, 540i, and ultra-high-performance M5 - each reflecting the engine size and capabilities. Engine choices include a 184-hp, 2.5-liter inline-six for the 525i, a 228-hp, 3.0-liter inline-six for the 530i, and a 282-hp, 4.4-liter V8 for the 540i. The M5 steps performance up exponentially with a 394-hp V8. All models are available with RWD layout and a five-speed manual or automatic, except the M5, which is manual only. Inside the cabin, in typical BMW fashion, build quality is high, and the design is driver-centric. Safety features include front side-impact airbags, head protection system, and an optional stability control system.