The keyfob should pry apart at the chevron between the key and remote buttons sections of the keyfob. After separating the unit, you may carefully insert the fob remote cap with snug pressure. remove the + screw on the backside of the key portion, under the Mazda emblem. there are 2 springs under load inside. There is a very important little chip (transponder/immobilizer) inside the key section which needs to be transferred to the new print.

May also fit CX-5, CX-7, Mazda 6, other vehicles using model number BGBX1T478SKE12501