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: Oil pump
OIL PUMP REMOVAL/INSTALLATION 1. Disconnect the negative battery cable. 2. Drain the engine oil. (See ENGINE OIL REPLACEMENT.) 3. Remove the oil pan. (See OIL PAN REMOVAL/INSTALLATION.) 4. Remove in the order indicated in the table. 5. Install in the reverse order of removal. 6. Inspect the en ...

Mazda 6 Service Manual: Operational Range
The system operates only when the driver is in the vehicle or within operational range while the key is being carried. Starting the Engine NOTE Starting the engine may be possible even if the key is outside of the vehicle and extremely close to a door and window, however, always start the ...