* Warped brake rotors: This is the most common cause. Overheating (e.g., hard braking, driving downhill for extended periods) can warp the rotors, causing a pulsating or shaking sensation in the brake pedal and steering wheel when braking.
* Worn brake pads: Severely worn brake pads can cause uneven braking pressure, leading to vibrations.
* Loose or damaged wheel bearings: Worn or damaged wheel bearings can create play in the wheel, resulting in shaking during braking.
* Suspension problems: Worn ball joints, tie rod ends, or other suspension components can contribute to shaking, especially when braking, as the added braking force puts extra stress on these parts.
* Out-of-balance wheels or tires: Though less likely to cause shaking *only* during braking, unbalanced wheels or tires can exacerbate any existing brake-related vibrations. Uneven tire wear can also contribute.
* Caliper issues: A sticking or seized brake caliper can cause uneven braking pressure on one side of the vehicle, leading to pulling or shaking.
* ABS issues (less likely): While less probable, problems with the Anti-lock Braking System (ABS) could contribute to vibrations, though usually accompanied by other ABS warning lights or symptoms.
To diagnose the problem:
You'll need to have a mechanic inspect your vehicle. However, you can perform some basic checks yourself:
1. Visually inspect your brake pads and rotors: Check for excessive wear on the pads and look for any warping or scoring on the rotors. Use a flashlight to get a good look.
2. Check your tires: Inspect for uneven wear and ensure they are properly inflated.
3. Check for play in the wheels: Grab each wheel at the top and bottom and try to move it. Excessive play indicates a potential wheel bearing problem.
It's crucial to get this issue checked and repaired promptly. Driving with a shaking brake system is unsafe and can lead to further damage or accidents. A mechanic will be able to properly diagnose the root cause and recommend the appropriate repairs.
