One problem related to radiator has been reported for the 2003 Toyota Sienna. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2003 Toyota Sienna based on all problems reported for the 2003 Sienna.
Here is a list of mechanical malfunctions indicating manufacturing defects on my Toyota Sienna. The current models recalled by Toyota motors do not cover all vehicles with defects. Based on my personal experience in the past few years, Toyota motors have a lot of lying employees in their authorized dealership. In short, Toyota motors put their business interest way ahead of the life safety of american people. I hope national highway traffic safety administration will check this manner and enforce proper regulation. Updated 03/14/10 the consumer stated the engine would stall. The dealer replaced the upper radiator hose and coolant. The consumer also stated he had problems stopping the vehicle, which led to an accident. Updated ivoq 10/12/10.