Audi A4 1995–1997 Transponder KeyB5 Audi A4 1998–2001 Remote KeyB5 (ID13, 97-98) Audi A4 1998–2001 Remote KeyB5 (ID48, 4D0) Audi A4 2000–2004 Remote KeyB6 Audi A4 2004–2008 Remote KeyB7 (2004-2006)IMMO3, RB8, 2004-2006 Audi A4 2004–2008 Remote KeyB7 (2006-2008)IMMO4, RB8, 2006-2008 Audi A4 2008–2016 Slot KeyB8 Audi A4 2008–2016 Smart KeyB8 Audi A4 2016–2025 Smart KeyB9