Hi guys, my gps antenna got broken while getting an interior detailing at the shop... it was on the dash. Anyway, I was thinking for my replacement gps antenna, I want it on a more secure area..., like on the roof of my car, where most of the cars have it. I have an IS300, was thinking of taking out the oem antenna...... does the gps antenna also support fm/am reciever? or is that separate?

Seperate

Is there a pioneer part number for it? Fm reciever?

FM antenna is built in to your car. The GPS antenna should be available at parts.pioneerelectronics.com or in the classifieds

Your cars antenna plugs into the back of your stereo, you need to keep it in place to recieve radio. The GPS antenna is only for the GPS signals and nothing else. You can get a new GPS antenna at the places mentioned above, or I've seen them on ebay also.