A:AnswerNo you do not need to be connected via usb. It works through bluetooth and all controls work from receiver. As for radio fit i cannot answer it but its not recommended through crutchfield.com
A:AnswerFits my 04 Ford just fine. Not compatible with steering wheel controls. At this price though?!? It is a 10* several months later & I still love it
A:AnswerThis is where I figured out if it would work in my car or not.
http://pioneerelectronics.com/PUSA/Car/Fit-Guide
This fit guide tells you what model radio would fit into your car. Hope this helps.
A:AnswerI bought it for a 2003 Mazda Protegé. It covered the same space as the old one. However, they installed it with a wiring harness and deck installation kit.
