I purchased my Prius in 2003 in Jan. I asked the dealer for information regarding the installation of an Radio Amateur Receiver and Transmitter in this type of vehicle. I am still waiting for proper installation details. I even wrote to the President of Toyota and an answer that they did not have the details.
There have been several wipe outs of computers that control many of the Prius functions by passing Trucks running over two Hundred Watts of RF power. The Prius resonates near the 27 Mhz. CB band,internal wiring, and this is a possible cause to their problem! WB9PUJ Fort Wayne IN.