2003 Ford Excursion Engine: 6L V8;. Part Type: Accessory Drive Belt Tensioner Assembly. 2004 Ford Excursion Engine: 6L V8;. 2005 Ford Excursion Engine: 6L V8;. Belt Type: Serpentine. Ensure that this part fits your vehicle by entering your vehicle's Year, Make, Model, Trim, and Engine in the Compatibility Table.