1998 - 1999 Mazda 626 AM FM CD Player Radio. OEM Radio Upgraded with Bluetooth Music Capability. Stream audio from a smartphone, tablet, or Bluetooth capable music device! -- Bose Version -- Part Number: GD7H669R0. Model Number: MDT030U3. Face Number: 4M31. This is for a Mazda 626 1998-1999 factory OEM AM FM CD Player Bose Radio that has been upgraded with Bluetooth music to use with streaming audio devices! You will not lose any functionality when the Bluetooth is in use and the radio will have all factory OEM features! Please note that this is for the Bose sound system and if you do not have the Bose sound system, this radio will not work in your vehicle. Part number is GD7H669R0, the model number is MDT030U3, and the face number is 4M31 so please make sure this is the correct radio for your vehicle. If you part number does not match exactly, it will likely not work. No codes required, it will plug and play! The Bluetooth upgrade is simple to operate! Just pair the device press the Bluetooth button and play your music or most in-app audio will play in full crisp clean quality while taking advantage of all sound controls on the radio. To complete paring some devices require a passkey or code which is "0000." When you do not want to listen to Bluetooth music simply unpair or turn off your device's Bluetooth. Please note: that this will not work with phone calls as phone manufacturers have designed calls to work with Bluetooth mic systems only. This radio is being sold as a REPLACEMENT ONLY! 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 a Mazda dealer a call with your VIN and they 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.