
The Gates Micro-V V‑ribbed belt for 2004–2005 BMW 530i with the 3.0L inline‑6 replaces the serpentine drive for alternator, water pump and power steering and is specified as heavy‑duty V‑ribbed. The source lists this belt for those 530i model years and engine, indicating the heavier V‑ribbed specification for the accessory routing on that application.
Gates 04-05 BMW 530I 6-Cyl. 3.0L Serpentine - Alt. W.P. & P.S. Heavy Duty V-Ribbed Belt