The Blind Spot Monitoring (BSM) system can be set to inoperable.
When the Blind Spot Monitoring (BSM) is set to inoperable, the Blind Spot Monitoring (BSM) and Rear Cross Traffic Alert (RCTA) systems are turned off and the Blind Spot Monitoring (BSM) OFF indicator light in the instrument cluster turns on.

NOTE
If the engine is stopped while the Blind Spot Monitoring (BSM) is turned off, the Blind Spot Monitoring (BSM) becomes operable the next time the engine is started.
 Blind Spot Monitoring (BSM) Warning Indicator Lights/Display Indicator/ Blind 
Spot Monitoring (BSM) Warning Beep
Blind Spot Monitoring (BSM) Warning Indicator Lights/Display Indicator/ Blind 
Spot Monitoring (BSM) Warning Beep Traffic Sign Recognition System (TSR) (Some models)
Traffic Sign Recognition System (TSR) (Some models)Mazda 6 Owners Manual: Generator removal/installation
   Warning
	When the battery cables are connected, touching the vehicle body with 
generator terminal B will generate sparks. This can cause personal injury, fire, 
and damage to the electrical components. Always disconnect the battery negative 
cables before performing the following operation.
 ...
   
Mazda 6 Owners Manual: Power window regulator removal/installation
   1. Disconnect the negative battery cable.
2. Remove the front door glass/rear door glass.
3. Remove the front door speaker/rear door speaker.
4. Remove the power window motor.
5. Remove the nuts.
6. Insert hand through the speaker installation hole, rotate the regulator 
drum housing in the  ...