A steering wheel shaking when braking is commonly caused by several issues related to the brake system and tires:
- Warped or Damaged Brake Rotors: Brake rotors can warp from heat and wear, causing uneven surfaces that make the brake pads press inconsistently. This results in a shaking or pulsating feeling through the steering wheel when braking.
- Uneven Brake Disc Thickness (Disk Thickness Variation - DTV): Uneven wear or improper installation of brake discs causes vibration during braking.
- Worn or Dirty Brake Pads: Dirt or wear on brake pads can cause uneven contact with rotors, leading to vibration.
- Brake Caliper Problems: Stuck or malfunctioning calipers can cause uneven pad pressure, contributing to shaking.
- Tire Issues: Unbalanced, worn, or improperly inflated tires can cause the steering wheel to shake, especially noticeable at higher speeds or during braking.
- Suspension and Steering Components: Worn suspension parts like tie rod ends, ball joints, or control arms can also contribute to a shaky steering wheel when braking.
This shaking often feels more intense when braking because weight shifts to the front tires, amplifying any existing imbalances or issues in the front suspension or brake components. Fixes typically involve inspecting and balancing tires, replacing or resurfacing warped brake rotors, replacing brake pads, inspecting and servicing brake calipers, and checking steering or suspension parts for wear or damage. Regular maintenance and smooth driving help prevent these issues.