I have a 2007 ES350 and suddenly the Bluetooth volume has dropped to very low levels such that I can barely hear incoming calls. No other issues with speakers. I have non NAV. How can I restore the Bluetooth speaker volume ?

 

Mine had the navigation, I believe you just had to turn up the volume during an active phone call.

 

Just press volume + while you talk over the bluetooth.

 

When you say just hit volume + are you referring to the iPhone? If so increasing the volume up on the phone has no impact on the low volume. If not the phone what are you referring to? Remember I have non NAV. Thx

 

I had this same problem too and it turned out to be the volume on my phone. Make sure it's turned all the way up. I was almost in panic mode trying to figure it out.

 

Volume + on the steering wheel.

 

Problem solved. The + button on the steering column raised the volume and the iPhone volume adjustment raised it further. Thanks!