 The audio system in this vehicle is the worst out of any vehicle I have ever owned. Entune audio plus with JBL speakers, has a problem which Toyota will not acknowledge. You cannot hear any sound from the rear speakers. I took the car in to have it checked only to be told it was working . The service manager listened to it and agreed . He searched Toyotas website for any info and  came up blank. He looked for another car in inventory with the same radio number to compare it to and it was the same. He said he would search further and get back to me. I searched the net only to find out this has been a problem since 2014 that Toyota won't acknowledge. Also the LDA(Lane Departure Alert) warning can't be heard. I was told there is no volume adjustment. Why won't Toyota fix their problems?