How to Install a Car Stereo in a Mazda Millenia

by Michael J. Scott

The Mazda Millenia was a luxury-class car manufactured between 1993 and 2003. It was designed to replace Mazda's popular 929 luxury car. The Millenia came with a factory stereo, and higher end models included a CD player. Nonetheless, the factory stereo lacked many of the features found in newer aftermarket stereos, including iPod and Bluetooth connectivity. Replacing the stereo in your Millenia is a simple process. You will need a dash adapter as the factory stereo is much larger than aftermarket models. You will also need DIN keys, or you can make do with bent wire hangers.

Purchase four Mazda radio DIN keys from an authorized Mazda dealer or you can make your own. Take two wire hangers and cut four 6-inch long strips from the hangers. Bend the strips into a U-shape with approximately 1 inch between the ends of the U. This will give you four make-shift DIN keys.

Disconnect the negative battery cable from your Millenia's battery.

Pry off the small trim panels along the sides of the stereo with a flat head screwdriver.

Slide the two radio removal keys or wire hangers into the four holes on each side of the stereo. Press the tools in until they click into place. Grasp both sets of tools and press them away from the stereo. While still pressing the tools outward, slide the stereo out of the dashboard.

Disconnect the wiring harness and antenna cable from the back of the old stereo.

Slide the DIN cage included with your stereo into your dash adapter. Slide the new stereo into the cage. Connect the stereo wires to the back of the new stereo. All aftermarket stereos have slightly different connection methods so refer to the installation instructions included with your stereo for specific instructions.

Slide the stereo and dash adapter assembly back into the dashboard and push it in until it clicks into place. Replace the trim panels and reconnect the battery.


  • close Never replace a stereo without disconnecting the battery first to avoid electrical shock.

Items you will need

About the Author

Michael Scott is a freelance writer and professor of justice studies at Westminster College in Salt Lake City, Utah, and is a former prosecutor. Scott has a J.D. from Emory University and is a member of the Utah State Bar. He has been freelancing since June 2009, and his articles have been published on and

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