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1999 Toyota Sienna
Worst 1999 Sienna engine Problems
Click on a problem below to read more.
- excessive oil sludge build up2
- won't start when engine is hot1
- NHTSA: Engine And Engine Cooling: Engine: Gasoline19
- NHTSA: Engine And Engine Cooling7
- NHTSA: Engine And Engine Cooling: Engine7
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Check out our Toyota Sienna overview to see the most problematic years, worst problems and most recently reported complaints with the Sienna.