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: Canceling Operation of Blind Spot Monitoring (BSM)
The Blind Spot Monitoring (BSM) system can be set to inoperable. When the Blind Spot Monitoring (BSM) is set to inoperable, the Blind Spot Monitoring (BSM) and Rear Cross Traffic Alert (RCTA) systems are turned off and the Blind Spot Monitoring (BSM) OFF indicator light in the instrument cluste ...

Mazda 6 Service Manual: Light switch inspection
Light switch LH side 1. Remove the light switch. (See LIGHT SWITCH REMOVAL/INSTALLATION) 2. Inspect for continuity between the light switch terminals using an ohmmeter. If not as specified, replace the light switch. Headlight switch Turn switch Light switch RH side 1. Remove th ...