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: Changing a Flat Tire
NOTE If the following occurs while driving, it could indicate a flat tire. Steering becomes difficult. The vehicle begins to vibrate excessively. The vehicle pulls in one direction. If you have a flat tire, drive slowly to a level spot that is well off the road and out of the way of tr ...

Mazda 6 Service Manual: Front seat belt removal/installation
Warning Handling the front seat belt (pre-tensioner seat belt) improperly can accidentally deploy the pre-tensioner, which may seriously injure you. Read SERVICE WARNINGS before handling the front seat belt. (See SERVICE WARNINGS.) Warning The side air bag sensor is attached to t ...