A low level of electrolyte fluid will cause the battery to discharge quickly.

Inspect the electrolyte level at least once a week. If it is low, remove the caps and add enough distilled water to bring the level between the upper and lower level (illustration).
Do not overfill.
Examine the specific gravity of the electrolyte with a hydrometer, especially during cold weather. If it is low, recharge the battery.
Battery Maintenance
Battery RechargingMazda 6 Owners Manual: Combine sensor initialization procedure
1. Set the SST (WDS or equivalent) to the DLC-2
2. Access the active command mode and select the YAWRATE, then follow the
indication on the monitor.
3. Select the LATACCEL and follow the indication on the monitor.
STEERING ANGLE SENSOR REMOVAL/INSTALLATION
(See COMBINATION SWITCH DISASSEMBLY ...
Mazda 6 Owners Manual: Special tools
ENGINE
Ford SST numbers are collated with Mazda SST numbers in the example below.
Ford SSTs are marked with Ford SST number.
Example
1: Mazda SST number
2: Ford SST number
LUBRICATION SYSTEM
COOLING SYSTEM
FUEL AND EMISSION CONTROL SYSTEMS
CLUTCH
MANUAL TRANSAXLE
AUTOMATIC T ...