Bought my new car on August 5, 2013 with 12 miles on it. Before I drove it off the lot, I was setting my Bluetooth to it. It make a loud pop. I thought I imagined it. Driving home, it did it again. There was a third and fourth time. I called Toyota and took it in. Took 2 weeks but they replace the "harness", but it was still making the sound. They ordered a new radio. 2 weeks later, it was installed. Seems to be working now.

Couldn't use any of the apps, maps, etc because popping sound was really loud. Hope this works.