You need to use a needle noise pliers for some of the screws and a small Philips screwdriver to remove the cover. The rear speakers are into a bowl shaped black plastic. You don't need to remove the rear shelf, except if you use speakers bigger than 6. Connect the factory wires to the speakers. Stop here if you are just changing the speakers.
For huge speakers: you've got to remove the shelf and the C pillar trim pieces too. Start by pulling up on the front of the seat part of the back seat. Then pull up and out to remove the seat back. You should see several trim fasteners holding the rear shelf in place remove those. The rear shelf should slide out. To remove the C pillar trim panels just grab them and gently pull them out. They're held in by tension fasteners.
Passive crossover for new amplifier installation. If you changed your whole system bye, bye old oem amp and installed a new amp, you need to install the passive crossover included with your component speakers.
The best location for the passive crossovers is in the trunk, at the fare back, behind the carpeting, you will find an area that is deeper than the rest of the trunk.
This is the ideal spot for the two if you have coax at the rear or four passive crossovers. Ideal because the wiring harness of the stereo is right there. Check the wiring to connect the wires to the crossovers.
You have to tap on the signals from the radio at the amp: Wire colors depends on Bmw year. Thanks Derek for the pictures 7. Find a location for the amp, either at the back of the rear seat in the trunk or like Anthony, relocate the stock amp and the new one at the same location. For the ground, don't try the rear tail light bolts This is a lousy ground and will give you a lot of alternator noise how do I know?
Don't ask. One of the rear seatbelt bolts will be perfect. Now you just have to connect your subwoofer s to the amp. If you use one sub only, make sure you have a bridgeable amp.
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