after you purchase a list of speakers from us, we will be sure you have the wiring harnesses and mounting brackets you would like to your motor vehicle. They're available for most cars. totally free life time https://www.caraudiocoho.com/products/mazda-3-car-radio-multimedia-player-1025screen-123screen-2014-2019-android-100-1920720-octa-core-6-128g-andriod-oem-system