The engine makes a humming when you push the accelerator or when its winding down. It also will do it at standstill or when driving.
My car has 85000 miles.
My car has a manual transmission.
Depending on the severity of the humming noise and where it may be coming from, this may be related your exhaust vibrating on a heat shield or something else underneath the car. This is somewhat common when a catalytic converter begins to fail. I would recommend having an expert from YourMechanic come to your location to diagnose and replace your catalytic converter.
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