Table 1 shows 16 common engine and engine cooling related problems of the 2004 Toyota Sienna. The number one most common problem is related to the engine and engine cooling (13 problems). The second most common problem is related to the radiator (ten problems).
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Radiator failure resulting in coolant leakage in the transmission fluid and transmission is failing. I noticed my 2004 Toyota Sienna had some belt noise that got worse. The van was due for a water pump/timing belt change. Read details...
Radiator leak, continuous problem. Could cause catastrophic engine failure. Toyota will not address repair. Read details...