The Nissan 350Z comes equipped with a standard AM/FM stereo with in-dash single disc CD player. The stock system offers comparable power in relation to other mid-priced sport coupes in its class. Nissan owners who wish to upgrade their stock stereo sound system or add aftermarket speakers and subs should also install an amplifier for power and clarity. You can elect to have a car audio professional install your amp or you can do it yourself in under 1 hour. Choose an amplifier that will sufficiently power the speaker arrangement in your "Z" while not exceeding the capacity of your vehicle's speakers.
Open the Nissan's bonnet and disconnect the negative and positive battery cables from their respective battery terminal posts. Use a 10mm wrench to loosen the bolts that secure each cable to the battery terminals. Lift the negative cable clamp away from the battery and set it beside the battery. Lift the positive cable from the post and place the ring terminal (from the amp kit) onto the positive battery lead. Replace the positive battery cable clamp over the ring terminal and tighten the clamp with the wrench.
Plug the power cable from the amp wiring kit into the ring terminal. Feed the power cable through the firewall of the 350Z and into the passenger's cabin. Remove the fuse from the ring terminal's fuse holder and keep it available for future replacement. Move to the inside of the car.
Grab the metallic ring that surrounds the gear selector lever and remove it from the centre console. Pry the centre console dash panel away from the dashboard with a trim panel removal tool. Lift the panel away from the dash and set it aside.
Remove the two screws at the bottom of the stereo assembly with a Phillips-head screwdriver. Pry the thin dash panel at the top of the stereo away from the dashboard with the trim removal tool. Remove the two screws behind the thin panel with the screwdriver. Remove the two screws outside of the two previously removed screws, at the top of the stereo, with the screwdriver. Remove the two screws under the stereo (outside of the previously removed screws below the stereo) with the screwdriver.
Grab the main centre dash panel at the top near the windshield and pull it away from the dashboard. Disconnect the stereo wiring from the back of the stereo. Plug the Nissan's stereo wiring connector into the lead connectors of the wiring harness adaptor. Plug the adaptor's leads into the corresponding outlets on the back of the stereo.
Plug the patch cables into the wiring harness adaptor leads and feed the cables through the back of the stereo dock, down to the floor of the Nissan's passenger side footwell.
Place the centre dash panel back against the dashboard and replace the four screws at the top and bottom of the stereo assembly. Place the thin dash panel above the stereo and press firmly against it to snap it back into place. Place the metal ring around the gear selector and press it into place.
Route the power cable from the driver's side of the Nissan to the rear cargo area. Fold the rear seat forward to gain access to the boot through the front of the vehicle. Lay the patch cables on the opposite side of the 350Z to the rear of the vehicle and into the rear cargo area. Place the amplifier in the boot.
Plug the patch cables and power cable into the appropriately labelled outlets on the amplifier. Connect a grounding wire (from the amp wiring kit) to the grounding outlet on the amp to a screw or bolt in the Nissan's boot. Any screw or bolt that is less than 20 inches from the amplifier and directly connected to the vehicle's frame will serve as an adequate grounding source. Return to the battery.
Place the negative battery cable onto the negative battery terminal lead. Tighten the cable to the post with the 10mm wrench. Place the fuse into the fuse holder on the ring terminal. Close the Nissan 350Z's bonnet.