Mazda MX-5 Miata Sport 2007 Manual page 191

2007 ACCESSORIES & BODY, CAB Security and Locks (Advanced Keyless System) - MX-5 Miata
NOTE:
Fig. 37: Positions For Inserting New Battery
Courtesy of MAZDA MOTORS CORP.
5. Rotate and close the cap.
6. Reinsert the auxiliary key.
Fig. 38: Closing Cap
Courtesy of MAZDA MOTORS CORP.
KEYLESS CONTROL MODULE REMOVAL/INSTALLATION[ADVANCED
KEYLESS SYSTEM]
NOTE:
If the keyless control module is replaced, always perform the following

procedure.
Without immobilizer system
2007 Mazda MX-5 Miata Sport
The batteries will last about 1 years when used 10 times a day.

Card key programming (See CARD KEY ID CODE REGISTRATION

[ADVANCED KEYLESS SYSTEM].)
Steering lock unit programming (See STEERING LOCK UNIT ID CODE

REGISTRATION[ADVANCED KEYLESS SYSTEM].)