Toyota 4Runner owners have reported 386 power train related problems since 1996. Table 1 shows the 31 most common power train problems. The number one most common problem is related to the vehicle's power train (130 problems). The second most common problem is related to the vehicle's differential unit (72 problems). For details of each of the problem category, use the links in the table.
Diagnosis found trans fluid wicking up harness to engine ecm contaminating harness and ecu given false/abnormal readings at ecm. Extensive repairs necessary w/ internal trans wire replacement, engine harness replacement & engine ecu replacement. Read details...
The vehicle has had a multitude of issues. I am on my 3rd different set of tires this year (including the original tires). No matter how many times the tires are balanced, the steering wheel shakes rather violently at certain speeds. Read details...
Rear differential housing has rusted through, leaks fluid, and is irreparable. Read details...
2009 4 runner transmission: same as other complaints about slipping and lag time in engaging into gear at low speeds (like when slowing down to make turns or go over speed bumps). Obviously not shifting correctly and is a safety issue when turning across traffic and the vehicle does not respond Read details...
Purchased a used 1997 4-runner with CA. 258000 miles early in 2020. Engine and whole body was good. However, 6 month later the car started to shake violently in the rear at highway speeds swinging like a boat, which I though was due to a broken shock, springs were newly installed in 2020. Read details...