New Replacement 3 Button Mazda Flipkey BGBX1T478SKE125-01For Mazda5, 2, CX7, CX9 W/Duracell Battery Inisde Match part number CC43-67-5RY or Fcc number BGBX1T478SKE125-01. Duracell battery inside package or remote. DIY Instructions available. You must have two, current, working keys.