| Car Maker | Model | Year | Cutting Style | Ignitions Key | Ignition Keys notes | Door & Trunk keys | Model Notes |
| Audi | S4 | 1995 | Double Sided | X139 | Chipless | || | || |
| Audi | S4 | 1996 | Double Sided | X139 | Chipless | || | || |
| Audi | S4 | 1997 | Double Sided | HU66-P | Chipless | || | || |
| Audi | S4 | 1998 | Double Sided | HU66-P | Chipless | || | || |
| Audi | S4 | 1999 | Double Sided | HU66-P | Chipless | || | || |
| Audi | S4 | 2000 | Double Sided | HU66-P | Chipless | || | || |
| Audi | S4 | 2001 | Double Sided | HU66-P | Transponder Key | || | || |
| Audi | S4 | 2002 | High Security | HU66T6 | Transponder Key | || | || |
| Audi | S4 | 2003 | High Security | HU66T6 | Transponder Key | || | || |
| Audi | S4 | 2004 | High Security | HU66T6 | Transponder Key | || | || |
| Audi | S4 | 2005 | High Security | HU66T6 | Transponder Key | || | || |
| Audi | S4 | 2006 | High Security | Dealer transponder system – VAG tester required | Transponder Key | || | || |
| Audi | S4 | 2007 | High Security | Dealer transponder system – VAG tester required | Transponder Key | || | || |
| Audi | S4 | 2008 | High Security | Dealer transponder system – VAG tester required | Transponder Key | || | || |
| Audi | S4 | 2009 | High Security | Dealer transponder system – VAG tester required | Transponder Key | || | || |
| Audi | S4 | 2010 | High Security | Dealer transponder system – VAG tester required | Transponder Key | || | || |
| Audi | S4 | 2011 | High Security | Dealer transponder system – VAG tester required | Transponder Key | || | || |
| Audi | S4 | 2012 | High Security | Dealer transponder system – VAG tester required | Transponder Key | || | || |