Easy to install. Without cutting any factory wire cable required. Professional pure core designed which makes excellent conductivity and long service life. For replacing OEM radio wiring harness connector to upgrade car stereo. Compatible for models without Factory Navigation or Premium Factory Sound System. Not work with factory AMP system. Stereo harness compatible with BMW 3 Series (w/out OEM Nav) 2002-2011, 5 Series 2002-2003, X5 (w/out OEM Nav) 2000-2006, Z4 2003-2011. Passat wiring harness also fit for Mercedes-Benz: Sprinter 2007-2010, Sprinter (w/out Radio Delete) 2011-2015, Mercedes c230 2006-2007. Radio wiring harness adapter fit for Audi: A3 2007-2010, A4 (w/ Symphony Radio) 2002-2008, A4 2009-2011, A6 2000-2011, A8 2000, A8, Quattro 2001-2011, S4 2000-2008, S6 2000-2007, S8 2000-2010. RED WOLF replacement for Volkswagen: Beetle 2012-2015, Cabrio 2002, CC 2009-2015, EOS 2007-2015, Golf 2002-2014, GLI 2002-2015, GTI 2003-2014, Jetta 1999-2015, Passat 2000-2015, Rabbit 2006-2009, Tiguan 2004-2015, Touareg 2004-2015.