Here are detailed instructions, with many photos, showing you how to replace the antenna base of a 2nd Gen Prius: http://www.wallwatcher.com/Antenna In a contest between an antenna and a garage door, the door always wins. It may get bent a little, but the antenna is likely to be ripped out of the antenna base (the black cone). There's a circuit board in that base, and it contains a pre-amplifier. If something on that board breaks off, or the wire connecting the pre-amp to the nut that holds the antenna breaks (both happened to me), you'll need a new antenna base. Your Toyota dealer can make the repair, and that's the safe way to get it done. But, my dealer said it would cost about $1,000 (almost $300 for the antenna base, plus lots and lots of expensive labor). You can buy the antenna base on the web for around $200, and it's actually pretty easy to do the job yourself... once you know how. It took me about 2-1/2 hours, including taking lots of photos and needing lots of time to figure out some things. Someone who has done this before and has the right tools (such as a mechanic at a Toyota dealer repair shop) should be able to do it in about 30 minutes. DISCLAIMER: Only try this if you're comfortable with the procedure; I won't be responsible for damage to you or to your car.