http://www.ifixit.com/Teardown/Tracking-Device-Teardown/5250/1 Disclaimer: We love the FBI. We've worked with them on several occasions to fight crime and locate criminals. We've helped them with instructions on gaining entry into certain devices. We have nothing against them, and we hope they don't come after us for publishing this teardown. Now that we're in the clear, it's TEARDOWN time! We partnered with Wired to bring you a peek inside an FBI car-tracking device. The device was loaned to us by an unknown owner and is similar to the one Yasir Afifi found underneath his car. The device comprises of a GPS unit for receiving the car's position, an RF transmitter for relaying your location to the interested authority (aka the FBI), and a set of sweet D-cell batteries that power the whole enchilada. But we didn't stop there, of course. Read on to find out exactly what components make this secretive device tick. ...