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: Coil removal/installation
Note Do not remove the coil unless you are replacing it. When only the coil is replaced, the immobilizer system reprogram procedure is not necessary. 1. Disconnect the negative battery cable. 2. Remove the column cover. 3. Remove in the order indicated in the table. 4. Install in ...

Mazda 6 Service Manual: Battery Recharging
NOTE Before performing maintenance or recharging the battery, turn off all accessories and stop the engine. To disconnect the battery, remove the negative cable first. Install it last when connecting the battery. Be sure to remove the caps before recharging the battery.   I ...