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: Variable valve timing actuator removal/installation
L3
Caution
Variable valve timing actuator can not be disassembled because it
is a precision unit.
Note
Variable valve timing actuator camshaft sprocket is integrated
with the variable valve timing actuator and cannot be disassembled.
1. Follow the timing chain removal/installati ...
Mazda 6 Owners Manual: Combine sensor removal/installation
Caution
Be careful and do not allow the combine sensor to fall. If by
chance it is subjected to strong impact, replace it.
1. Remove the center console.
2. Remove in the order indicated in the table.
3. Install in the reverse order of removal.
4. After installation, perform the comb ...