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: Child-Restraint Precautions
Mazda strongly urges the use of child-restraint systems for children small enough to use them. You are required by law to use a child-restraint system for children in the U.S. and Canada. Check your local and state or provincial laws for specific requirements regarding the safety of children ...