Mazda 6 Service Manual: No.22 vibration concerns (engine)

No.21 engine noise

No.23 a/c does not work sufficiently

Other materials:

Mazda 6 Service Manual: Rear wheel alignment
Specification (Unloaded)*1 Normal Elevated*3 *1 : Engine coolant and engine oil are at specified level. Spare tire, jack and tools are in designated position. *2 : Difference between left and right must not exceed 1°30'. *3 : Distance between wheel center and fender brim is 392 mm {15.4 ...

Mazda 6 Service Manual: Antilock Brake System (ABS)
The ABS control unit continuously monitors the speed of each wheel. If one wheel is about to lock up, the ABS responds by automatically releasing and reapplying that wheel's brake. The driver will feel a slight vibration in the brake pedal and may hear a chattering noise from the brake system ...