Lexpilot53

When I lock my 03 RX300 with the remote, the parking lights flash and there is a faint beep. I read in the owners manual that these functions can be adjusted, but that you need to contact the dealer.. Does anyone know if you can make that beep louder? I can't even hear it from inside the house. My Maxima sounds a quick beep of the horn. Not going to pay the dealer hundreds to change this, but hope I can do it myself. Thanks!