One problem related to brake drum wheel cylinder 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.
Toyota Sienna 2005 was taken into dealership for regular maintenance service which included a check of the brakes. Was told rear brakes needed to be replaced and that was performed. Was told by dealer that front brakes were fine. 1 month later having problems with brakes still. Took it to private mechanic and was told that master brake cylinder needed to be replaced. I would think this problems would have been detected when it was at the dealership. I am lucky that my brakes did not fail and cause an accident. Other issues with this 2005 Toyota Sienna include having to replace the a/c compressor twice, rack and pinion replaced, and now the rear struts on the tailgate have failed. This vehicle is a serious safety risk.