Two problems related to other fuel system have been reported for the 2012 Toyota Sienna. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Toyota Sienna based on all problems reported for the 2012 Sienna.
When pressing the brake the engine revs suddenly and to very high rpms and you have to press down on the brake and/or throw car into neutral/drive and then eventually the issue resolves. Happened yesterday when reversing very slowly out of driveway--was pressing brake (not accelerator) and suddenly the engine got very loud and was revving up. Pressed brake hard and thru the car into park and pressed the accelerator and the engine went back to normal. Very scary. Has happened several times before and fortunately we have not run into anything and the car has not taken off at high speed.
The top hinge of the fuel filler door broke at 82000 miles. It now does not allow the automatic sliding door on the drivers side to open because of the safety mechanism. The hinge broke when I opened the door during refueling.
| Other Fuel System problems | |
| Other Fuel System Tank Assembly problems | |
| Other Fuel System Pump problems |