1. Engine mounts: Engine mounts are responsible for holding the engine in place and absorbing vibrations. If they are worn out or damaged, they can cause the engine to vibrate and make a humming sound.
2. Transmission: If your car is automatic, the transmission could be the source of the humming noise. Transmission issues can cause the car to vibrate, especially when idling.
3. Wheel bearings: If the wheel bearings are worn or damaged, they can cause a humming sound and vibration.
4. Driveline: Problems with the driveline, such as worn or damaged u-joints or CV joints, can also cause a humming sound.
5. Vacuum leak: A vacuum leak can also create a humming sound, particularly if the leak is near the throttle body or intake manifold.
6. Exhaust System: A loose exhaust pipe or muffler can also cause humming noises and vibrations.
If you're experiencing a humming sound and vibration when your car is idling, it's important to get it checked out as soon as possible to prevent any further damage.
