One problem related to rear window wiper washer 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.
2004 Toyota Sienna Mini van - windshield cracks immediately even if it receives an extremely small (less than half a milimeter) stone chip on the edges of the windshield. As soon as there is an extremely small stone / pebble chip, it will crack right away.