2007 2008 Honda Civic Navigation Sytem Radio. Part Number: 39541-SNA-A320-M1. Interchangeable Part Numbers: 39540-SNA-A30-ZA, 39540-SNA-A31-ZA. Code Included.This is for a Honda Civic Radio with Navigation Capabilities. This radio has been professionally remanufactured, cleaned, and serviced as needed and thoroughly checked. The radio's appearance is good with scratches on the bottom right of display and general wear on face. See pictures for more details. Radio is as pictured, and is in 100% working order. This Navigation System Radio is being sold as a REPLACEMENT ONLY! The part number is 39541-SNA-A320-M1. 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.