Some cars dont have it. Ive fixed 4 cars, and only two of them had it. I fixed an RX-7/57m, RSX/35(originally a celica), castrol GTR/35, and a Xanavi GTR/57mhz. Both the GTRs had em. So as long as your car can travel more than 4 or 5 feet away, you should be fine. My two GTRs wouldnt, so i had to do that to em.