One problem related to brake disc has 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.
Rear brakes, both, pads completely worn away or separated from backing plate. The vehicle has only 22000 miles on it. In my type of driving, brakes normally last at least 40,000 miles. Front brakes appear to be ok, wearing normally.