One problem related to manifold/header/muffler/tail pipe has 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.
2009 Toyota Sienna. Consumer writes in regards to vehicle fire the consumer's insurance company determined that oil leaked from a faulty valve and seal in the manifold cover. However, Toyota provided a different explanation as to how the vehicle caught on fire. They stated the fire was caused by spilled oil and overfilling of oil. Toyota stated they have a photo of the dip stick proving that the oil was overfilled, but refused to provide the picture.