Wire Harness for Installing a New Radio into a Infiniti, I35, 2002, 2003, 2004. Replace The Factory Bose or Premium Amplified System Stereo wire harness for installing a new Radio into a INFINITI I35 02, 03, 04 When using this harness it is recommended to purchase an aftermarket radio that has 4 audio rca outputs CarXtc wire harness plugs directly into a I35 and the wires match up to the same wire colors on your aftermarket radio - Make sure you tape/terminate the speaker wires on your new radio - This harness plugs into the RCA outputs on your new radio Plugs directly into your vehicle radio harness, no cutting or trying to figure out what each of the wires do. Antenna adapter is needed for your INFINITI I35 This car had an optional premium system (usually a Bose) that has a factory built in amp. Would recommend getting the amplified version of this harness if you have the premium system