The short answer to your question is yes. If you have a tape deck, the easiest way to go is with a cassette adapter. If you have an aftermarket CD player (that is, one that you had installed after purchasing the car), it may have RCA jacks in the front or the back where you can connect an MP3 player with an RCA-to-1/8-inch stereo plug cable. Certain stereos even have a direct line-in jack, which looks just like a headphone jack, so you can just use a 1/8-inch-to-1/8-inch cord. Unfortunately, most stock systems do not have RCA or line-in jacks, in which case you're stuck with the FM transmitter method. I recommend the iRock Beamit 440FM wireless music adapter. Also check out our step-by-step Weekend Project tutorial and video on how to use an iPod in your vehicle.