Two problems related to power steering failed have been reported for the 2005 Toyota Sienna. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2005 Toyota Sienna based on all problems reported for the 2005 Sienna.
2005 Toyota Sienna: power steering fails intermittently, resulting in a loss of power steering and sudden increase in steering effort, increasing the risk of a crash. Driver is at risk if sudden steering away from an event is necessary due to the effort and inconsistent nature of the steering. There are many complaints about this that can be found on various forums on the internet. It is a serious problem that should not be ignored and should be addressed before rather than after someone dies as a result of this vehicle fault.
Vehicle had been parked. When we backed out I turned the wheel to the left. There was a "clunk" and it felt like I just went over some object with the right front tire. We could find nothing in the parking lot that would contribute to this. I drove the car that day without further incident. The next day we went on a 430 mile trip. Several times that we parked we heard the same "clunk" and felt a slight drop in the right front. I went to the Toyota dealer as soon as I could get an appointment on 2/26/13. Toyota found that the internal power steering rack was failing and had to be replaced for safety. The part number was: 0 44250-08041. I asked Toyota if there were any safety recalls. There were none. Toyota said these failures did occur on trucks in heavy duty use but not in Sienna Mini-vans.