How to Install a Custom Stereo on a Mazda 3

Written by mark slingo
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How to Install a Custom Stereo on a Mazda 3
Mazda 3s come with high quality factory issue radios. (autoradio 2 image by Nathalie P from Fotolia.com)

The Mazda 3 comes with a Bose sound system pre-installed in the car. Whilst this sound system is of higher quality than many factory-issue sound systems, some owners might like to take advantage of the wide range of aftermarket car stereos available from retailers. With up-to-date features included in many of the sets, owners can customise the features they would like to have in their car's entertainment system. Installation requires wiring adaptations and amendments to the dashboard to allow the stereo to fit.

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Remove the Old Stereo

The car battery must be disconnected first to ensure that there is no risk of short circuit or electric shock. Twist the negative terminal to release the adjoining cable. Open the glove box. Pull away the decoration panel by inserting a flat head screwdriver underneath and prying the panel off. Remove the two screws holding the head unit onto the dash. Pull the head unit away from the dash. Pull out the aerial cable. Disconnect the wire connector.

Adapt the Dashboard Housing

Using a Mazda 3 radio installation kit, connect the kit to the radio installation sleeve, which comes provided with the custom stereo. Slide the sleeve through the face plate of the installation kit, until its end is level with the portal. Bend the tabs on either side of the sleeve into the slots on the portal to secure them together. Feed the radio wiring through the front of the portal. Slide the assembled kit into the Mazda dash. Attach it with the Phillips screws removed earlier. Reconnect the decoration panel above the radio.

Connect the Custom Stereo

The wiring of the custom stereo needs to be adapted with a connection adaptor. Connect one end to the wire connection coming from the rear of the new stereo. The connections will click together. Attach the other end to the wire connection coming from the car. Plug the aerial cable straight into the port on the back of the custom stereo.

Final Installation

Push the custom stereo into the prepared kit. Slide it in until it clicks into place. Connect the negative terminal on the car's battery.

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