1997 - 1998 - 1999- 2000 - 2001 -2002 - 2003 Buick Century AM FM Radio Cassette Player w Auxillary Input. No Code Required. Part Number: 10303191. Option Code: UN6. This is for a Buick Century AM FM radio cassette player with aux input. This radio has been professionally remanufactured, cleaned, and serviced as needed and thoroughly checked. The radio's appearance is in good cosmetic condition, as pictured, and is in 100% working order. This radio is being sold as a REPLACEMENT ONLY! The part number is 10303191. If you do not have this exact part number currently in your vehicle, it will likely NOT WORK. If you are unsure of your part number, give us a call with your VIN and we should be able to provide you with the correct part number. They may look the same and have the same plugs but data streams may be different, not allowing them to code. For example, external amps are used in some cars and will not allow interchange, etc. The Auxiliary Input is a snap to operate. Literally! Just plug in your 3.5mm cable and it will play in full crisp clean quality. When you want to listen to the radio again simply unplug the cable! The audio is full quality and takes advantage of all sound controls on the radio. Forget those shoddy FM transmitters and listen to music the way it's supposed to sound! If you have any questions about the operation of the jack please feel free to call!