Mazda 6 Service Manual: No.20 noise occurs at idle when vehicle is stopped in all positions/ranges

No.19 excessive shift shock on torque converter clutch (tcc)

No.21 noise occurs at idle when vehicle is stopped in d, s, l ranges, or in r position

Other materials:

Mazda 6 Service Manual: Rear brake (disc) removal/installation
1. Remove in the order indicated in the table. 2. Install in the reverse order of removal. 3. After installation, depress the pedal several times, rotate the wheel by hand, and verify that the brake does not drag. Disc Pad Installation Note 1. Turn the manual adjustment gear counterclockwi ...

Mazda 6 Service Manual: Lights-On Reminder
The lights-on reminder is operable when the time setting*1 of the auto headlight off function is off. If lights are on and the ignition is switched to ACC or off, a continuous beep sound will be heard when the driver's door is opened. *1 If the light switch is left on, the auto headlight off f ...