I have an aftermaket system. I put two kenwood 6x9's in the back and my front door speakers are infiniti kappas. The trunk label you asked about did have a UQ3 code on it as well. My gt sound system in it's stock form had two front door speakers, tweeters, and 6x9's in the rear. I put the aftermarket speakers in about a year and a half ago, but have not had an issue at all until now. The stock system was not Bose either, i think they were just delco speakers.