The Mazda6 or Mazda 6 is a large family car produced by the Japanese car manufacturer Mazda since 2002. Some model years of the Mazda 6 have keyless entry remote fob smart keys that are onboard programmable, meaning a person can program the keyless entry remote fob smart key with no special equipment other than the keyless entry remote fob smart key programming instructions. However, other model years are not onboard programmable and require special equipment in order to program the keyless entry remote fob smart key. The Mazda6 has sold over one million units worldwide since its introduction, hitting this sales milestone faster than all previous Mazdas.