How to Convert Mazda Stereo for MP3 Input

Written by jule pamplin
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How to Convert Mazda Stereo for MP3 Input
(Thomas Northcut/Photodisc/Getty Images)

There are two ways to connect your MP3 player to your stereo in your Mazda. Both methods will work if you do not have a stereo that receives a direct input from your MP3 player. An FM transmitter is an inexpensive solution for playing MP3 files. You connect the transmitter to your MP3 player and to your cigarette lighter, and the transmitter broadcasts a signal to be picked up by your vehicle's antenna. The way to connect your MP3 player directly to your stereo is via an FM modulator. The FM modulator connects to your MP3 player and stereo to avoid interference. Installing an FM modulator is relatively easy if you follow a few simple steps.

Skill level:
Moderately Easy

Things you need

  • 10mm wrench
  • Mazda DIN removal keys
  • Wiring harness adaptor
  • FM modulator
  • MP3 player

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  1. 1

    Lift the bonnet of the Mazda and disconnect the negative battery cable from the negative battery terminal. Use a 10mm wrench to loosen the clamp on the cable. Rest the cable away from the battery until the installation is complete.

  2. 2

    Squeeze the Mazda DIN removal keys to align the prongs with the holes at either side of the stereo's face. Insert the keys into the holes and push them in until they lock into place.

  3. 3

    Pull outward on the keys while pulling the stereo from the vehicle's stereo mounting dock.

  4. 4

    Disconnect the stereo wiring from the back panel of the factory radio by pulling the plastic wire connectors from the outlets on the rear panel of the stereo. Unplug the antenna cable from the FM antenna outlet on the rear panel of the stock radio.

  5. 5

    Plug the stereo wiring into the wiring harness adaptor leads.

  6. 6

    Plug the wiring from the FM modulator into the corresponding signal and power supply leads of the wiring harness. Consult the wiring harness adaptor manual for the appropriate leads to use.

  7. 7

    Plug the Mazda antenna cable into the input on the FM modulator. Plug the FM modulator cable into the FM antenna outlet on the back of the stereo.

  8. 8

    Feed the MP3 connector through the opening in the side of the stereo mounting dock and into the adjacent glove compartment. Stow the main box of the FM modulator in the back of the stereo mounting dock.

  9. 9

    Plug the wiring harness adaptor leads into the rear outlet of the factory stereo. Slide the stereo into the stereo mounting dock until it locks into place. Remove the Mazda DIN removal keys from the slots on the stereo's face.

  10. 10

    Plug the MP3 connector into the MP3 player's 3.5mm headphone jack.

  11. 11

    Replace the negative battery cable onto the negative battery terminal. Tighten the cable's clamp with the wrench.

  12. 12

    Tune the Mazda stereo to the frequency provided by the modulator manual. Turn on the MP3 player and make sure the content plays through the stereo.

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