What Causes Steering Wheel Shaking When Braking at 120 km/h on the Highway?

[SamanthaMarie]

There are two main reasons for steering wheel shaking when braking at 120 km/h on the highway. Below are the relevant explanations: 1. Uneven brake disc wear. When the brake discs are unevenly worn, stepping on the brakes at high speeds can cause the steering wheel to shake. When our car reaches a certain speed and brakes, the left and right wheels on the same axle may experience one or more instances of asynchronous braking within a circle due to uneven braking torque, resulting in a pattern of alternating tight and loose braking. When the imbalance in braking torque reaches a certain level, it causes the left and right wheels to roll at unequal speeds, leading to a side-to-side wobble of the wheels, which is then reflected in the steering wheel. 2. Fault in the drivetrain. The reason for steering wheel shaking during high-speed braking could also be an issue with the vehicle's drivetrain. In such cases, it's best to check for rust or looseness in components like the tie rods and tie rod ends.