One problem related to brake squeaking noise has been reported for the 2004 Toyota Sienna. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2004 Toyota Sienna based on all problems reported for the 2004 Sienna.
The brakes on my 2004 Toyota Sienna constantly makes a squeaking noise when braking. We noticed this 3 months after our purchase. Noise is heard by passengers in the 3rd row or when radio is off. The dealer has been unable to fix problem.