There are 2 stored owner reports matching the engine 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 2 of 2 matching reports.
Open the full vehicle complaint log (all categories)Two transfer case seals failed at 64,000 miles. Caused excessive oil to leak out of transfer case and onto the exhaust. Safety was put as risk by potential full failure of transfer case which can cause loss of power at speed or leaking oil on exhaust causing a fire. Problem was verified by Armstrong Automotive and repaired. No warning lights were present. Problem found after smelling burning oil and noticing smoking coming from underneath vehicle.
TL* THE CONTACT OWNS A 2018 TOYOTA 4RUNNER. THE CONTACT STATED THAT WHILE DRIVING A POPPING NOISE OCCURRED THAT WAS COMING FROM THE ENGINE. THE VEHICLE STARTED TO DECELERATE. THE VEHICLE STARTED MAKING AN ABNORMAL SOUND THAT WAS COMING FROM THE ENGINE. THE VEHICLE THEN WAS ABLE TO DRIVE NORMAL. THE AIR BAGS WARNING LIGHT ILLUMINATED. THE VEHICLE WAS TAKEN TO FRED HAAS TOYOTA WORLD (20400, I-45, SPRING, TX 77373) TWICE, BUT WAS NOT DIAGNOSED NOR REPAIRED. THE VIN WAS INCLUDED IN NHTSA CAMPAIGN NUMBER: 20V682000 (FUEL SYSTEM, GASOLINE). THE MANUFACTURER WAS NOT MADE AWARE OF THE FAILURE. THE FAILURE MILEAGE WAS APPROXIMATELY 47,000.
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.