The subwoofer in the Acura MDX Bose system is an 8-inch sub that runs off the factory Bose amplifier. When looking to replace the sub, it must fit. There are replacement subs for the Acura system on the market that will fit right into the vacant spot. If you have another sub option, check the dimensions to make sure it fits.
Items you will need: Phillips screwdriver
Locate the subwoofer and remove the screws, then pop off the cover.
Unscrew the four screws that hold the sub into place.