One problem related to car accelerates on its own has been reported for the 2015 Toyota Sienna. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2015 Toyota Sienna based on all problems reported for the 2015 Sienna.
My Sienna van sometimes responds very late to acceleration. This becomes a problem on highways specifically during the merging. Acceleration paddle has to be pressed very hard, for first few seconds there is no response from engine then latter it suddenly accelerates. This makes you miss judge the time required to merge on highways and can cause accidents. This has been happening since few months. I am providing tentative date below.
| Vehicle Speed Control problems | |
| Car Accelerates On Its Own problems |