I have a 2007 Sentra SE-R with the six speaker stereo. My aux input jack seems to have a loose connection, requiring the occasional jiggle to get proper audio (ie not only one channel or muffled, etc). Sometimes a jiggle fixes it for a week, sometimes I have to fight with it, unplugging and replugging my cable to get it to sound right. It's not the cable. I've run through a few thinking it was. Is this something easily fixed by any car audio place, or is it one of those things they don't plan on breaking, so you have to replace the whole head unit? Any input would be appreciated.