Three problems related to vehicle speed control have been reported for the 2009 Toyota Sienna. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Toyota Sienna based on all problems reported for the 2009 Sienna.
Unexpected accelaration while attempting to park;low speed, barely moving. The vehicle(2009 Toyota Sienna lunged forward and hit a parked vehicle causing damaged to the Sienna and the parked vehicle.
My wife was pulling into a daycare parking space with our two kids, going 3 mph (according to black box readings) when the vehicle suddenly began accelerating. The vehicle jumped the curb, hit a retaining wall hard enough to throw it backwards and get stuck in a snowbank (luckily), where the vehicle finally stopped. My wife was flooring the brake the whole time, with no effect. We contacted Toyota, who sent out an inspector who inspected the brakes and accelerator. Weeks later we received a letter from Toyota's legal department saying the inspector found nothing wrong wtih the brakes or accelerator, and since this is not a manufacturer defect, there is nothing further they can do. The Toyota dealership said they follow Toyota's orders, so they cannot help either. We're going to have to sell this as I don't feel safe driving it.
In November 2009 while parking my car in store parking, my foot was on brake my car accelerated, suddenly jumped on the 1 foot high footpath and crashed into the store injuring few people. Nothing worked even brakes jammed. I contacted the Toyota and they sent me letter after 30 days that they have found nothing and Toyota dealer was not ready to take any part in resolving the problem. They refused to give me rental vehicle and I had to pay one month of rental car as well. I am scared to drive this vehicle now. I would like to file a complain to take immediate action in this regards. Thank you.