What are the symptoms of a bad top mount bushing in a car?

[NovaLee]

The symptoms of a bad top mount bushing in a car include increased tire noise, and in severe cases, a rumbling sound can be heard. The simplest way to identify it is a noticeable decrease in comfort, especially when going over speed bumps, where a distinct 'thud' sound can be heard, making it seem like there's an issue with the shock absorbers. The top mount bushing, also known as the pressure top bushing, primarily serves as a buffer. For example, when driving over speed bumps normally, it allows the tires to fully contact the ground while slightly lifting the body, providing excellent comfort. Additionally, the top mount bushing has a sound-dampening effect, helping to reduce the tire noise generated between the tires and the road. It also minimizes the direct impact on the car when driving over rough or uneven road surfaces.