general problems of the 2018 Toyota 4Runner

Two problems related to power train have been reported for the 2018 Toyota 4Runner. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2018 Toyota 4Runner based on all problems reported for the 2018 4Runner.

1 Power Train problem

Failure Date: 03/21/2025

While my father was exiting his 2018 Toyota 4runner sr5, the vehicle unexpectedly started reversing fairly quickly, despite no foot being on the brake. He was dragged by the vehicle while attempting to stop it outside the car, and it continued moving backwards then down a hill before crashing into a fence, causing significant damage to both the car and the fence. This vehicle should not have rolled back at this speed, and it appears to be related to a potential design flaw in the vehicle’s brake-shift interlock system or automatic reverse functionality. This incident is concerning, and after reviewing discussions in various forums, it seems that similar issues may not be isolated to this particular vehicle and could point to a larger defect in Toyota vehicles. I am very disappointed that there are no built-in safety features that could have prevented this incident. It is extremely concerning that the vehicle shifted into reverse while the driver was in the process of exiting. A vehicle should not be able to reserve this quickly or move into reverse unintentionally without the driver’s control. This poses a serious safety risk to drivers and bystandards, and I strongly urge the NHTSA to investigate this issue and determine whether a defect or design flaw contributed to the incident. Implementing proper safeguards could prevent similar accidents in the future.

2 Power Train problem

Failure Date: 01/01/2022

The front differential in our 2018 Toyota 4runner failed. This caused damage to one of the front axels of the vehicle. The failure can cause difficulties in turning the vehicle. The failure can lead to catastrophic failure of the axels, leading to the wheels to lock up. The problem is reoccurring in model years 2016-2019. Toyota is aware of the problem and has issued bulletins (see Toyota technical service bulletin t-tci-5185 rev. 1, dated 4/5/2019). Yet, Toyota refuses to offer a cost free repair of the failure/damage. The failure was inspected and confirmed by an authorized Toyota dealership on 2/9/2022. The failure had no warning signs/indicators. The failure began approximately 30-45 ago with a faint grinding sound coming from the drivetrain while driving.


Other Power Train related problems of the 2018 Toyota 4Runner

Power Train problems
2
Transfer Case problems
1


Safety Ratings of 4Runner Cars
Fuel Economy of 4Runner Vehicles
4Runner Service Bulletins
4Runner Safety Recalls
4Runner Defect Investigations