Problems · by component

2012 Toyota Sienna electrical system problems

27 owner complaints to NHTSA about the 2012 Toyota Sienna cite electrical system, 11% of all 247 complaints for this model year.

Complaints
27
11% of all complaints
Crashes
0
Reported by owners
Fires
2
Reported by owners
Injuries
0
Reported by owners
01 —Owner reports

What owners say about the electrical system

Verbatim from NHTSA complaints, newest first
“Odometer Fraud. The contact purchased a 2012 Toyota Sienna. The contact discovered a mileage discrepancy after the purchase. The vehicle was a private sale. At the time of purchase, the vehicle mileage was 48,230. It was later discovered that the mileage on the Title was 241,080.”
Owner complaint to NHTSAFiled Sep 12, 2025Electrical systemODI 11686996
“The engine stalled, power steering frozen then engine shut off while driving in an intersection. Replaced new battery, dove home upon arrival the engine stalled again, power steering frozen and engine shut off again. I don’t know what’s going on.”
Owner complaint to NHTSAFiled Jun 7, 2022Electrical system, EngineODI 11468008
“WAS DRIVING HOME FROM RUNNING ERRANDS, ABOUT A 4 MILE DRIVE AT 35 MILES/HR. AT A STOP LIGHT THERE SEEMED TO BE SOME SORT OF ELECTRICAL SURGE. ALL THE DASHBOARD LIGHTS FLASHED AND THE VEHICLE TURNED OFF. I WAS ABLE TO PUT THE CAR IN PARK AND RESTART IT. THERE WERE NO WARNING LIGHTS ON AFTER RESTARTING THE ENGINE, SO I ASSUMED IT WAS A FLUKE AND CONTINUED ON MY WAY HOME. A LITTLE FURTHER DOWN THE ROAD AT ANOTHER STOP LIGHT IT HAPPENED AGAIN. I PULLED INTO MY DRIVEWAY AND STARTED TO UNLOAD MY CAR WHEN I NOTICED SMOKE EMANATING FROM UNDER THE HOOD. I OPENED THE HOOD TO DISCOVER A SMALL FIRE COMING FROM A LARGE GROUP OF WRAPPED WIRES BEHIND THE BATTERY. I WAS ABLE TO PUT IT OUT QUICKLY WITH A FIRE EXTINGUISHER, BUT THE CAR IS COMPLETELY DEAD AND THE ENTIRE ELECTRICAL HARNESS NEEDS TO BE REPLACED AS WELL AS SOME OTHER NEARBY PARTS. THIS VEHICLE WAS WELL TAKEN CARE OF. THERE IS JUST UNDER 65,000 MILES ON IT AND I BROUGHT IT IN FOR IT'S 60K MAINTENANCE 6 MONTHS AGO (6/11/18). AT THAT TIME THEY ALSO TOOK CARE OF THE RECALLS FOR THE PASSENGER SIDE AIRBAG AND THE POWER SLIDING DOORS. SINCE I WAS ABLE TO CONTAIN THE FIRE QUICKLY, THIS VEHICLE SUFFERED MINIMAL ENGINE…”
Owner complaint to NHTSAFiled Dec 5, 2018Electrical system, Unknown or otherFire reportedODI 11156461
“THIS CAR CAUGHT ON FIRE FEW MINUTES AFTER SOME ELECTRICAL ISSUES- WHILE DRIVING THE CAR WITH EVERYTHING LOOKING JUST FINE , THE A/C FAN FLUCTUATED ON AND OFF -CAR BLUE TOOTH ALSO KEPT DISCONNECTED AND RECONNECT FOR A FEW SECONDS THEN ALL DASHBOARD LIGHTS ILLUMINATED ON AND OFF FEW TIMES . AFTER MAYBE 2 MINUETS I REACHED HOME ,MAY FAMILY GOT OFF THE CAR WHEN I NOTICED SMOKE COMING FROM THE HOOD . I OPENED THE HOOD TO FIND A MEDIUM SIZE FIRE COMING FROM THE DRIVER SIDE OF THE ENGINE, I CALLED 911 RIGHT AWAY . IN LESS THAN 10-15 MINS MOST OF THE CAR MELT FROM THE FIRE PLUS THE WHOLE GARAGE.”
Owner complaint to NHTSAFiled Sep 11, 2018Electrical system, Visibility, Unknown or other, EngineFire reportedODI 11128824
“1) POWER SLIDING DOOR OPENED WHILE DRIVING; 2) STRER WHEEL ALWAYS STAY ON RIGHT. I TOOK MY VAN TO DELAER (MARK JACOBSON) AND THEY HAVE NOT FIXED THE SLIDING DOOR AFTER I REPORT THE PROBLEM WITH SLIDING DOOR. AFTER I STARTED SEARCHING ON INTERNET AND FOUND THAT THERE IS RECALL ALSO. I CALLED THEM THERE IS A RECALL BUT THEY DID NOT DO ANYTHING. RECALL DATE: NOVEMBER 22, 2016 DEALER REFERENCE ID: G04 NHTSA RECALL ID: 16V858”
Owner complaint to NHTSAFiled Nov 19, 2017Steering, Electrical system, StructureODI 11047282
“2013 TOYOTA SIENNA MINIVAN THE POWER DOORS NO LONGER CLOSE AND OPEN PROPERLY, THEY ESSENTIALLY STICK, AND WE HAVE TO MANUALLY GET OUT, AND SLAM IT SHUT WITH GREAT FORCE. THE CAR DOOR OPENED ONCE WHILE I WAS DRIVING. MY CHILD ON THAT SIDE WAS WEARING A SEATBELT, I PULLED OVER, AND HAD TO GET OUT TO SHUT THE DOOR WITH GREAT FORCE. FOR A LONG PERIOD, TOYOTA DIDN'T HAVE A FIX FOR THIS PROBLEM. I HAVE BEEN CALLING THE DEALERSHIP REGULARLY TO SEE IF THE "FIX" HAD ARRIVED. FINALLY, IN AUGUST I WAS TOLD THAT IT HAD, AND THAT THE SOONEST THEY COULD FIX MY CAR WAS DECEMBER 27!!! I HAVE TOLD THEM THAT I PAID FOR A FEATURE, TO HAVE POWER DOORS WHICH BOTH WORKED AND DIDN'T POSE A SAFETY LIABILITY. I HAVE ASKED FOR EITHER A LOANER CAR, OR COMPENSATION. THEIR RESPONSE HAS BEEN THAT THEY APOLOGIZE FOR THE INCONVENIENCE, BUT THAT THEY ARE NOT WILLING TO GIVE ME ANOTHER CAR, OR COMPENSATE ME. I HAVE FOUR CHILDREN, ONE OF WHOM IS SPECIAL NEEDS.IN ORDER TO ENSURE SAFETY, I HAVE HAD TO DISABLE THE POWER FEATURE. I BOUGHT THE CAR WITH THE POWER FEATURE BECAUSE IT'S SOMETHING THAT WE RELY ON. I FEEL THAT I SPENT MONEY ON SOMETHING THAT IS DEFECTIVE, AND A SAFETY LIABILITY, AND WE ARE…”
Owner complaint to NHTSAFiled Sep 26, 2017Electrical systemODI 11029975

Showing 6 of 27 reports. Read every report on NHTSA.gov.

Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 3, 2026NHTSA vehicle page

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.

Other 2012 Sienna problem areas