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 bumper removal/installation
1. Disconnect the negative battery cable. 2. Remove the rear combination light. 3. Remove in the order indicated in the table. 4. Install in the reverse order of removal. Rear Bumper Removal Note Pull the rear bumper ends (wheel arch) outward to disengage with the bumper slider. Cautio ...

Mazda 6 Service Manual: Battery recharging
Warning Keep any flammable away from the battery, otherwise evaporated gas of the battery fluid may catch fire, and cause serious injury or death. Caution When removing the battery, disconnect the negative battery cable first and install it last to prevent damage to electrical compo ...