Hi, my name is Devin. I am an auto repair expert with the Car Genius team here at RepairPal. I'm sorry to hear you're having trouble with your Highlander.
Your description points to a potentially complex issue involving multiple systems. The pulsing and jerking when braking could be caused by an ABS malfunction, especially since you also see VSC and traction control warning lights. This might indicate a faulty ABS wheel speed sensor, a failing ABS module, or an issue with the brake booster.
The knocking sound and engine-like vibrations you feel could be linked to worn or broken engine mounts. Damaged mounts can cause the engine to shift excessively during braking, making it feel like it's about to fall out. Another possibility is a malfunction in the traction control system, which could mistakenly activate during braking.
Although shops have told you that the brakes and rotors are fine, it is worth getting a second opinion. Worn brake components can cause many of the symptoms you are experiencing.
It's concerning that previous shops couldn't help. A thorough diagnostic scan is critical to get to the root of the problem. It's important to use a scanner that can access ABS, traction control, and VSC codes. Finding a shop experienced with Toyota systems or taking it to a dealership may provide better insights.
If you need more advice, have any other questions about your vehicle, or would like to get connected to a RepairPal Certified shop near you, we have you covered. Give us a call at 877-913-1554, and we will happily help you out!
