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: Maintenance Monitor
The following maintenance period notifications can be displayed by turning the Maintenance Monitor on. Scheduled Maintenance Tire Rotation Oil Change For the setting method and indications for the maintenance monitor, refer to the Maintenance Monitor. The maintenance monitor displays ...

Mazda 6 Service Manual: Supplier identification procedure
Note When asking the supplier (service center) for repair or replacement, verify which supplier the module belongs to and enter in the Audio Repair Order Form. Identification With Printed Numbers/Label 1. Remove the audio unit. 2. Verify the supplier name written on the label attached ...