What are the causes and solutions for steering wheel vibration when braking?
3 Answers
Steering wheel vibration during braking is mostly caused by uneven brake discs. You can replace the brake discs or have a professional resurface them. Here is some information about brake discs: 1. The brake disc is an important component in the braking system: When the brake pedal is pressed, the brake caliper piston pushes the brake pads, which then clamp onto the brake disc, causing the vehicle to decelerate. 2. Uneven brake disc surface: When the brake pads clamp onto an uneven brake disc, it results in steering wheel vibration. 3. Regular vehicle maintenance: It is essential to frequently inspect the braking system, as it is crucial for driving safety.
I've been driving for over 20 years and have encountered steering wheel vibration during braking multiple times. The most common cause is warped brake rotors. I tend to drive aggressively, and frequent hard braking can overheat the rotors. Especially when driving through puddles immediately after descending a long slope, the thermal expansion and contraction can easily cause warping. Another common reason is uneven wear or hard spots on the brake pads. The solution is actually quite simple: take it to a repair shop and have the mechanic first inspect the brake rotors. For minor warping, they can be resurfaced (professionally called 'rotor turning'), while severely warped ones need replacement. At the same time, have the brake pads checked - if they're worn down to a thin layer, the entire set needs replacing. Also ask the mechanic to check if the wheel hubs are warped, as this can also cause vibration. Remember not to delay - this vibration affects handling and can be very dangerous.
In the workshop, car owners often complain about steering wheel vibration when braking, which is most likely due to issues with the front brake discs. After prolonged use, the surface of the brake discs becomes uneven, causing uneven friction between the disc and pads during braking, which transmits to the steering wheel. Another possible cause is poor retraction of the brake caliper, leading to one-sided friction. The solution requires professional equipment: first, use a dial indicator to measure the runout of the brake disc surface. If it exceeds 0.05 mm, it needs to be addressed. Resurfacing the disc is the best option if possible, but severely warped discs must be replaced. Additionally, inspect the suspension ball joints and tie rods, as aging rubber bushings can exacerbate the vibration. It's recommended to have the technician check the brake disc thickness during every maintenance service.
