Leaderboard

bacosta007, Two possible problems come to mind. The head unit amplifier for those speaker channels has quit working, or ... the connector on the back of the head unit has come loose and is not making contact. If you are a DIYer with car tear down and audio experience, pull the head unit and disconnect the wiring harnesses to it (disconnect the battery first, after copying down the frequencies of all your radio presets). It might be just that simple to correct. If that doesn't correct the issue, check with a Lexus dealership to see if they have an exchange program for the head unit. Years ago (1986 I believe) I had a radio issue with my wife's Toyota Cressida. Toyota had and exchange program where you gave them the old radio to refurbish and they gave you a refurbished unit to replace it with for like $350 or so (long time ago and the details are fuzzy). Maybe Lexus has something similar? Worth checking. Good Luck!