Mazda 6 Service Manual: No.23 a/c does not work sufficiently

No.22 vibration concerns (engine)

No.24 a/c is always on or a/c compressor runs continuously

Other materials:

Mazda 6 Service Manual: Tire Maintenance
Improper or inadequate vehicle maintenance can cause tires to wear abnormally. Here are some important maintenance points: Tire Inflation Pressure Inspect all tire pressure monthly (including the spare) when the tires are cold. Maintain recommended pressures for the best ride, top handling, an ...

Mazda 6 Service Manual: Drive belt auto tensioner inspection
1. Remove the drive belt. (See DRIVE BELT REPLACEMENT.) 2. Verify that the drive belt auto tensioner moves smoothly in the operational direction. Replace the drive belt auto tensioner if necessary. 3. Turn the drive belt auto tensioner pulley by hand and verify that it rotates smoothly ...