There are 3 owner-reported electrical system complaints for the 2012 Toyota 4Runnerin NHTSA's database. These are unverified consumer reports and may not reflect confirmed defects.
THE BACKUP CAMERA DOES NOT WORK CONSISTENTLY. WHILE NOT MOVING AND THEN SHIFITING INTO REVERSE, THE SCREEN DOES NOT CHANGE OR CHANGES TO SOMETHING OTHER THAN THE CAMERA. IT USUALLY STOPS WORKING AFTER SEVERAL STOPS AND SHIFTS INTO REVERSE. SOMETIMES IT GOES 2 OR 3 DAYS WITHOUT DISPLAYING AND THEN STARTS WORKING AGAIN ANOTHER DAY.
SQUIRRELS KEEP EATING MY ELECTRICAL WIRING AND THE WIRING HARNESS. THEY ACCESS THE ENGINE BAY THROUGH THE OPENINGS IN THE WHEEL WELLS AFTER JUMPING ON TOP OF THE TIRES. THE RESULTS HAVE DISABLED MY ABS, 4WD, LIMITED SLIP, ETC. I'VE TRIED RODENT REPELLENT, FOX URINE, AND PARKING IN THE GARAGE. NOTHING HELPS. TOYOTA NEEDS TO STOP USING SOY BASED WIRING, AND THEY NEED TO CLOSE THE HOLES IN THE WHEEL WELLS.
TOYOTA USES NEW GREEN (ENVIRONMENT FRIENDLY) WIRING THAT IS TASTY TO RODENTS AND OTHER PEST- THEY ARE AWARE THAT IT CAN ATTRACT ANIMALS TO EAT THE WIRING AND ELECTRICAL SYSTEMS ON THEIR VEHICLES AND REFUSE TO COVER THE DAMAGES INCURRED ON THE WARRANTY - THEY REFER THE CUSTOMERS TO SEEK MONETARY AIDE FROM THEIR INSURANCE COMPANY - IN MY CASE IT WAS $3000.00 IN DAMAGES TO MY VEHICLE FOR A RAT EATING THE WIRES /ELECTRICAL SYSTEM. MY INSURANCE PAID FOR IT - BUT HOW CAN I BE ASSURED IT WILL NOT OCCUR AGAIN. ?? TOYOTA NEEDS TO BE RESPONSIBLE. *TR
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
Data synced from NHTSA on Apr 26, 2026