One problem related to brake sensor has been reported for the 2009 Toyota Highlander Hybrid. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Toyota Highlander Hybrid based on all problems reported for the 2009 Highlander Hybrid.
At roughly 80k miles, every time I started the car, a "brake malfunction" alert would display. Multiple sensors on the are illuminated. The brakes feel normal, but recently I did notice some audible noises when I use the brakes. I took it to the dealership and they said the brake actuator needed to be replaced for around 3200 w/ labor. After doing some research, I found that this same system was recalled on the camry hybrid but not the Highlander Hybrid, despite many complaints. If this is a manufacturing defect, it is a very dangerous one that could cause brake failure and lead to death.