The 2012 Chevy Malibu thump sensor can be found on the left back side of the motor block. This sensor is utilized to identify thump in the motor which can happen when there is low quality fuel or an issue with the fuel conveyance. Assuming You definitely disapprove of a thump sensor You will typically see that Your vehicle will run harsher. It isn't there watching the motor and that can make things not fill in also. Normally You will get a check motor light at Your scramble and a code will be put away in Your ECU to tell You to examine and supplant the sensor.