Why Does the Car Vibrate When Braking?

Vibrations braking can be produced for many reasons. The most common are brake discs, bushings or bearings.

Why does the car vibrate when braking? Surely this question has been around many drivers every day; the symptoms vibrations in several parts of the vehicle are annoying.

Before making any decision, it should be identified that the vibrations only occur when the brake is depressed. If they occur when the vehicle is circulating, the problem arises from other parts. The causes that generate vibrations when braking is the following.

Vibrations when braking: brake discs

One of the most common parts that can cause vibrations braking are brake discs. These can be ‘folded’ or warped by a sudden change in temperature. It usually happens when the brake system is subjected to intensive use such as driving through traffic jams or driving in fear and not lifting the foot of the brake pedal.

Remember that the disc is the element of the brakes that rotates. Braking occurs when the calliper brings the pad closer to its surface. If the disc deformation is quite noticeable, a loss of braking efficiency can be perceived. To be able to detect the fault, the first step is to remove a wheel to see if the disc is bent or the worn-out pads.

If so, it is best to change new discs and pads.

Vibrations when braking: brake discs

Vibrations when braking: damaged hubs

Damaged bushings are also caused by vibration when braking and this part is attached to the brake disc. Rust, a tire, or even a bad assembly can cause this part to suffer anomalies and not rotate correctly. If this part has been damaged, the disc may also be damaged.

It is recommended to remove rust or dirt, but if the problem persists, it is best to change it. Of course, you will have to change the two hub bushings; right and left side.

Vibrations when braking: damaged hubs

Vibrations when braking: bearings

Defective bearings can also cause possible vibrations when braking, but they are quite complicated to detect since they do not present the fault constantly. Sometimes, bearing failure may appear when braking but may not be one of the reasons.

Keep in mind that this breakdown is usually accompanied by noise when the vehicle enters a curve or strong braking. The solution is to put the new bearings, like the bushings, you will have to change the two shaft bearings.

Vibrations when braking: bearings

Vibrations when braking: other causes

The vibrations braking can also be caused by driving with unbalanced tires, by wear of the kneecaps, by wear of the suspension brackets, or even by some dampers in poor condition.

In order to avoid these failures, it is recommended to carry out the relevant maintenance, a special one when a long trip is to be made without forgetting to pass the ITV periodically.

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