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: Blind Spot Monitoring (BSM) (Some models)
The Blind Spot Monitoring (BSM) is designed to assist the driver in checking the area to the rear of the vehicle on both sides during lane changes by notifying the driver of the presence of vehicles approaching from the rear in an adjacent lane. The Blind Spot Monitoring (BSM) detects vehicle ...

Mazda 6 Service Manual: Oil filter
OIL FILTER REPLACEMENT For Europe (LF and L3 engine models) Caution To avoid damage to the oil filter, use only specified oil filter. 1. Remove the oil filter drain plug. 2. Untighten the oil filter cover for 2 turns and drain the engine oil. Note Oil could be easily drained when th ...