1. Warped Brake Rotors: If the brake rotors are warped or uneven, it can cause the brake pads to vibrate and create a shuddering sensation. This can be checked by visually inspecting the brake rotors for any visible warping or unevenness.
2. Uneven Brake Pad Wear: If the brake pads are not evenly worn, it can also cause the brakes to shudder. This can be caused by a variety of factors, such as a faulty caliper, a seized brake piston, or a problem with the brake fluid.
3. Suspension Issues: In some cases, shuddering during braking can also be caused by issues with the vehicle's suspension, such as worn or damaged control arms, ball joints, or bushings.
4. Low Brake Fluid: Low brake fluid can cause air to enter the brake lines, which can lead to spongy or shuddering brakes.
It's important to have the cause of the shuddering diagnosed properly to ensure that the appropriate repairs are made. I recommend taking your vehicle to a qualified mechanic or brake specialist for further inspection and diagnosis.