Why is the 2010 Prius with NAV FM Radio reception so bad, it is like it is barely getting any signal with hiss and crackle and I live in the Philadelphia area, many strong stations, but stations I never had an issue with in any other car are poor reception in the 2010 Prius. Same in both my 2010 Prius with NAV and my wifes 2010 Prius with NAV. I am suspecting a poor antenna design or how the antenna/receivers couple with XM receivers/antenna. Audio through XM and Bluetooth is great, but there is no excuse for a 2010 Toyota to have this issue with FM reception.
Hmmm - did you know there is a gen III audio forum? There are other existing threads on this known problem. Theories I've seen to date are it needs a better or longer antennae, better shielding of the wiring, and/or better antennae preamp.