One problem related to alternator/generator/regulator has been reported for the 2011 Toyota Sienna. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2011 Toyota Sienna based on all problems reported for the 2011 Sienna.
I experience battery drain that will empty my battery if I completely shut off the van, remove the keys, and remain in the van for longer than 10 minutes. This occurs after testing the alternator and replacing the battery. It happened the month after I purchased the van at just one year old. I have at the same time experienced the front headlight burning out and/or going out repeatedly. I believe there is something innately causing battery drain having to do with the headlight or the pressure sensor of the seat that the passenger sits in.
| Electrical System problems | |
| Battery Dead problems | |
| Ignition Switch problems | |
| Ignition problems | |
| Car Will Not Start problems | |
| Electrical Failure problems | |
| Alternator/generator/regulator problems |