This battery tray fits 2004-2008 Audi S4 models with a 4.2L V8 engine. The part number is 8E1805229A and it is interchangeable with part number 8E1-805-229-A or 8E1 805 229 A. It is a genuine Audi part and was removed from a used vehicle. The tray is in good condition and ready for installation.