I have done a few bose systems on older nissans. If each speaker has its own amp, you can reuse some of the wires. There are two wires used for signal which run to the radio harness. The other two are power wires for the amp and are usually thicker. You can reuse the signal wires along with a standard radio harness. I have a feeling its like this. The best thing to do is pull out a speaker and see how many wires run into it and if there is an amp on it.