2006 Toyota Sienna Forward collision avoidance Problems

“The contact owns a 2006 Toyota Sienna. While driving at an unknown speed, the auto brake feature engaged without warning. The dealer and manufacturer were not notified. The vehicle was not repaired. The failure mileage was 120,000. The VIN was not available.”

“Vehicle Trac Control/ABS system engages periodically especially on winding roads between speeds of 30-60mph. Trac Control alarm goes off and vehicle pumps brakes automatically, then resolves. This is extremely dangerous especially when roads are wet/icy or when being followed too closely by another vehicle. Tried replacing front right wheel speed sensor but problem persists. Research shows this is a chronic problem with Sienna vans and needs to be repaired or guidance provided by Toyota on how to resolve before someone gets hurt. Please help!”

“While driving vehicle on dry, non slippery roads with slight to moderate curves, vehicle illuminates Traction Loss light, sounds alarm buzzer, and at times applies brakes and dethrottles engine, even when no loss of traction has occurred. This happens while driving on straight roads with slight unevenness. Had to disconnect wheel speed sensor harness to disable ABS/VSC system. When this happens, the vehicle automatically applies brakes to certain wheels and dethrottles the engine, this can pull the vehicle to one side sharply and can cause an accident.”