MacBook Pro 14" (2021 A2442) Left Fan
An aging left fan may become noisy and inefficient or simply fail and stop spinning, leaving your laptop to overheat and eventually damaging your processors. Replace a defective left fan to fix overheating problems or to keep your 2021 model 14" MacBook Pro running quietly.
If your screen is facing you, this is the fan on the left side of the machine.