One problem related to automatic transmission has been reported for the 2009 Toyota Sienna. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2009 Toyota Sienna based on all problems reported for the 2009 Sienna.
Our 2009 Sienna may have had a sudden acceleration problem. When the car was put into reverse, a sudden acceleration sent it down our driveway. Situation: pulling into the carport, which involves a 90 degree turn at the top of a short (10m) steep narrow walled easement, the driver of the Sienna could not make the turn in one motion and was required to put the Sienna in reverse at which time the minivan suddenly accelerated, squealing its wheels. The result was a 5m careen down the driveway. The result was about $4,000 body damage, but no injury to the driver or my 2yr old daughter - although all were shaken. We have since got rid of the car - traded it for a 2010 highlander.
| Power Train problems | |
| Automatic Transmission problems | |
| Transmission Solenoid problems |