The system operates only when the driver is in the vehicle or within operational range while the key is being carried.
NOTE
When the battery power is low, or in places where there are high-intensity radio waves or noise, the operational range may become narrower or the system may not operate. For determining battery replacement.
 Advanced Keyless Entry System
Advanced Keyless Entry System Locking, Unlocking the Doors
Locking, Unlocking the DoorsMazda 6 Owners Manual: Recommendations for Shifting
   Upshifting
For normal acceleration and cruising, Mazda recommends these shift points:
*1 Always observe local speed limit regulations.
Downshifting
When you must slow down in heavy traffic or on a steep upgrade, downshift before 
the engine starts to overwork. This gives better acceleration w ...
   
Mazda 6 Owners Manual: Supplemental Restraint System (SRS) Precautions
   The front and side supplemental restraint systems (SRS) include different types 
of air bags. Please verify the different types of air bags which are equipped 
on your vehicle by locating the “SRS AIRBAG” location indicators. These indicators 
are visible in the area where the air bags are in ...