Mazda 6 Service Manual: No.12 lack/loss of power-acceleration/cruise

No.11 engine stalls/quits, engine runs rough, misses, buck/jerk, hesitation/stumble, surges

No.13 knocking/pinging-acceleration/cruise

Other materials:

Mazda 6 Service Manual: Front/rear abs wheel-speed sensor inspection
Visual Inspection Remove the wheel and tire, and inspect the sensor for looseness and damage. Replace the sensor if necessary. Clearance Inspection Inspect the clearance between the wheel-speed sensor and the sensor rotor. Clearance 0.3-1.1 mm {0.012-0.043 in} Resistance Inspection ...

Mazda 6 Service Manual: Changing a Flat Tire
NOTE If the following occurs while driving, it could indicate a flat tire. Steering becomes difficult. The vehicle begins to vibrate excessively. The vehicle pulls in one direction. If you have a flat tire, drive slowly to a level spot that is well off the road and out of the way of tr ...