There are 3 stored owner reports matching the electrical system leading-label group for the 2018 Toyota 4Runner in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 3 of 3 matching reports.
Open the full vehicle complaint log (all categories)Apparently rodents have gone to the engine and ate the soy wires to the harness. This in turn has cost me over $1000 to fix. The only warning was when the warning lights came on and four runner started to shake when started.
PURCHASED VEHICLE BRAND NEW WITH 18 MILES ON IT. I GET IT SERVICED LIKE CLOCKWORK AND HAVE NEVER MISSED A MAINTENANCE APPOINTMENT. A LITTLE OVER A WEEK AGO, THE ELECTRICAL LOCKING SYSTEM ON THE DRIVERS SIDE DOOR STOPPED FUNCTIONING. TOYOTA IS TELLING ME THAT THERE ARE NO RECALLS AND IT WILL COST ME ALMOST $1000.00 TO REPAIR. NOW, THE ELECTRIC LOCKING SYSTEM FOR THE PASSENGER SIDE DOOR IS NOT WORKING AND TOYOTA IS STILL SAYING IT IS NOTHING THEY CAN DO BECAUSE THERE IS NO RECALL AND THE VEHICLE IS NO LONGER UNDER WARRANTY. THIS IS NOT ACCEPTABLE. ONE MINUTE THE LOCKING SYSTEM WAS WORKING WITH NO OBVIOUS SIGNS THAT SOMETHING WAS AMIDST, THEN ALL OF A SUDDEN, MY 4 RUNNER DOORS ARE NOT LOCKING. NOW THE COST IS DOUBLE AND THEY ARE SAYING THAT THE OTHER DOORS WILL SOON FOLLOW.
VEHICLE WAS BEING DRIVEN ON BELTWAY AND SUDDENLY LOST ALL POWER, BRAKING, AND STEERING CAPABILITIES. EMERGENCY BRAKE WAS USED TO STOP VEHICLE. VEHICLE WAS NOT ABLE TO BE RESTARTED. PHONE ATTACHED VIA CIGARETTE OUTLET WAS ZAPPED. MANUFACTURER HAS FAILED TO ASSUME ANY RESPONSIBILITY CUSTOMER HAS ENDURED DUE TO THIS TOTAL VEHICLE MALFUNCTION.
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.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Apr 29, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.