You can program your 2003, 2004, and 2005 Mazda 6 Hatchback remote yourself at home with these simple instructions.

**There is also a free programming tutorial video below to show you how easy it is done.
NOTE: A maximum of 3 key remote transmitters can be programmed.
Obtain all key remote transmitters.
Remove key from ignition switch.
Close all doors.
Open driver’s door.
Carry out the following procedure within 24 seconds:
Turn ignition switch ON and back to LOCK position 3 times.
Close and then open the door 3 times (ending with door open)
Ensure doors lock and unlock.
If not, wait 40 seconds and repeat procedure starting with driver’s door already open.
Press UNLOCK button of each key remote transmitter twice.
Ensure doors lock and unlock after each operation.
If not, proceed as follows:
Open and close driver’s door once.
Ensure doors lock and unlock twice.
Repeat procedure starting with driver’s door already open.