Why Your BYD Song Plus Brake Pedal Pulsates – Warped Rotors and What to Do

What Causes Brake Pedal Pulsation?

When you brake and feel a rhythmic pulse through the pedal, the most likely culprit is warped brake rotors (discs). On the BYD Song Plus, this can happen due to excessive heat from hard braking, uneven pad deposits, or simply age. Less common causes include worn wheel bearings or a misaligned brake caliper.

Which Parts and Sensors to Check First

Start by inspecting the brake rotors for visible runout or discoloration. Also check these key components:

• Brake rotors – measure thickness variation and lateral runout.
• Brake pads – uneven wear can transfer deposits to the rotor.
• Wheel speed sensors – a faulty sensor can trigger ABS incorrectly, causing pulsation.
• ABS modulator – rare but possible if the pulsation is inconsistent.

Is It Safe to Keep Driving?

While you can drive short distances with a mild pulsation, it’s not recommended. Warped rotors reduce braking efficiency and can lead to vibration that stresses other suspension parts. If the pulsation is strong or accompanied by a pulling sensation, have it inspected immediately. Your safety – and that of other road users – depends on your brakes being in top condition.

This material is AI-generated and for informational purposes only — it does not replace an in-person diagnosis by a qualified mechanic.