Is it normal for the engine to hum when braking in D gear?

[OCollin]

It is normal for the engine to hum when braking in D gear. However, if the vibration is severe, it may indicate that the engine mount is damaged. The engine is connected to the frame via engine mounts, which are typically made of rubber. These mounts help absorb engine vibrations. Without them, the vibrations from the engine would directly transfer to the car body, affecting ride comfort. When waiting at a red light, if there are only a few seconds left, you can keep the car in D gear while braking. If the light has just turned red, you can shift to N gear. Avoid using P gear when waiting at a red light, as shifting to P gear and getting rear-ended by another vehicle could damage the transmission.