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

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Mazda 6 Service Manual: Troubleshooting
Mazda Bluetooth® Hands-Free Customer Service If you have any problems with Bluetooth®, contact our toll-free customer service center. U.S.A. Phone: 800-430-0153 (Toll-free) Web: www.MazdaUSA.com/bluetooth Canada Phone: 800-430-0153 (Toll-free) Web: www.mazdahandsfree.ca Mexico Cente ...

Mazda 6 Service Manual: Intermittent concern troubleshooting
  Vibration Method 1. If malfunction occurs or becomes worse while driving on a rough road or when engine is vibrating, perform the steps below. Note There are several reasons vehicle or engine vibration could cause an electrical malfunction. Some of the things to check for are: ...