One problem related to brake sensor has been reported for the 2006 Toyota Sienna. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2006 Toyota Sienna based on all problems reported for the 2006 Sienna.
The vehicle was in motion . Driving up the mountain . When the traction control sensors went on and braked and began moving the steering wheel . Alarms where going off when no danger occurred . The next two hours the sensors would alarm. Did not matter how slow or fast we drove it would brake going up and down the hill. Took car to dealership and they stated that it was a yaw sensor malfunction part number 89180-45010. $900+ charge.