This Custom Fit Performance Interface allows you to replace your factory OEM stereo while retaining data controlled +12V accessory output as well as provide navigation outputs for reverse vehicle speed pulse and park brake. An interface is a small computer system that allows your new head unit to properly communicate with your vehicle's computer system. If you install a new aftermarket radio without using an interface, you will lose many of the standard security features of the vehicle. This is due to vehicle manufactures running part of the vehicle's computer system through the OEM radio. Functions lost include, but not limited to, are warning chimes (keys left in ignition, lights left on, low fuel etc.), security and alarm systems, +12V accessory and more. If the +12V accessory is lost, your radio will not turn on/off automatically and will be a manual process.Specifications: WARNING CA Proposition 65 Yes WARNING CA Proposition 65 Message WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov Description_DES Custom Fit Performance Interface Description_EXT Custom Fit Performance Interface; Data Driven +12V Accessory Output w/R.A.P.; VSS; Parking Brake; Reverse; Illumination; Retains Steering Wheel Control Functions; Description_FAB Data Driven 12V Accessory Output w/R.A.P. Description_FAB Retains All Safety And Warning Chimes For GM Platforms Description_FAB Retains Steering Wheel Control Functions Description_MKT This Custom Fit Performance Interface allows you to replace your factory OEM stereo while retaining data controlled +12V accessory output as well as provide navigation outputs for reverse vehicle speed pulse and park brake. An interface is a small computer system that allows your new head unit to properly communicate with your vehicle's computer system. If you install a new aftermarket radio without using an interface, you will lose many of the standard security features of the vehicle. This is due to vehicle manufactures running part of the vehicle's computer system through the OEM radio. Functions lost include, but not limited to, are warning chimes (keys left in ignition, lights left on, low fuel etc.), security and alarm systems, +12V accessory and more. If the +12V accessory is lost, your radio will not turn on/off automatically and will be a manual process. Description_SHO RadioModInt This Part Fits: Year Make Model Submodel Notes 2012 Fiat 500 Abarth 2013 Fiat 500 Abarth 2014 Fiat 500 Abarth 2015 Fiat 500 Abarth 2013 Fiat 500 Abarth Cabrio 2014 Fiat 500 Abarth Cabrio 2015 Fiat 500 Abarth Cabrio 2012 Fiat 500 c Gucci 2012 Fiat 500 c Lounge 2013 Fiat 500 c Lounge 2014 Fiat 500 c Lounge 2015 Fiat 500 c Lounge 2012 Fiat 500 c Pop 2013 Fiat 500 c Pop 2014 Fiat 500 c Pop 2015 Fiat 500 c Pop 2013 Fiat 500 E 2014 Fiat 500 E 2015 Fiat 500 E 2012 Fiat 500 Gucci 2012 Fiat 500 Lounge 2013 Fiat 500 Lounge 2014 Fiat 500 Lounge 2015 Fiat 500 Lounge 2012 Fiat 500 Pop 2013 Fiat 500 Pop 2014 Fiat 500 Pop 2015 Fiat 500 Pop 2012 Fiat 500 Sport 2013 Fiat 500 Sport 2014 Fiat 500 Sport 2015 Fiat 500 Sport 2013 Fiat 500 Turbo 2014 Fiat 500 Turbo 2015 Fiat 500 Turbo