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: Front door lock actuator inspection
Door Lock Actuator 1. Disconnect the front door lock actuator connector. 2. Apply battery positive voltage to the front door lock actuator terminals and inspect the operation of the front door lock actuator. If not as specified, replace the front door lock actuator. With double locking ...

Mazda 6 Service Manual: Shift-Lock Override
If the selector lever will not move from P using the proper shift procedure, continue to hold down the brake pedal. 1. Remove the shift-lock override cover using a cloth-wrapped flat head screwdriver. 2. Insert a screwdriver and push it down. 3. Press and hold the lock-release button. 4. Mov ...