2006 Toyota 4RUNNER structure problems
143 owner complaints filed with NHTSA name the structure on the 2006 Toyota 4RUNNER — 38% of all complaints for this model year.
What owners report
“Frame is rotting away. The tacomas, tundras, sequoia were recalled for this issue. The tacomas frame is very close in design to the 4runner. The main difference is the 4runner uses coil springs whereas the tacoma used leaf springs. Toyota stated that because the 4runner was made in Japan unlike the…”
filed Apr 22, 2026
“The frame under the car rusted so much that the gas tank literally fell through the frame to the ground. This put my son at risk and fortunately he was able to pull over in a residential area and exit the vehicle. A mechanic and welding company both assessed the vehicle and acknowledged the u…”
filed Sep 11, 2025
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
The condition known as acid rain is caused by airborne chemicals or particles in the atmosphere, which mix with rainwater, nighttime dew, or high humidity to form acidic compounds. If these contaminants settle and…
T-SB-0039-24 Rev2 · Service Bulletin/Repair Instructions · issued Dec 6, 2024To prevent brake rotor rust from forming during transportation and storage, wheel film will be used instead of a cardboard type of anti-rust cover. The purpose of the wheel film is to shield the disc brake rotor from…
T-SB-0038-24 Rev2 · Service Bulletin/Repair Instructions · issued Dec 6, 2024Acid rain results from rainwater or other airborne moisture that become acidic due to industrial chemical impurities in the atmosphere. If these acidic compounds settle on an exposed vehicle, especially the horizontal…
T-SB-0035-24 Rev2 · Service Bulletin/Repair Instructions · issued Dec 6, 2024Toyota vehicles are currently protected with RapgardTM protective film designed to protect the horizontal painted surfaces. This material protects from acid rain, environmental fallout, and rail contamination. Follow…
T-SB-0061-23 Rev2 · Service Bulletin/Repair Instructions · issued Dec 5, 2024Vehicles may occasionally be subjected to contamination by airborne iron particles shed from railroad tracks, train wheels, exposure to heavy machinery facilities, grinding, welding, etc. This type of contamination can…
T-SB-0062-23 Rev2 · Service Bulletin/Repair Instructions · issued Dec 3, 2024
Structure problems in other 4RUNNER years
| Year | Reports | Share |
|---|---|---|
| 2025 4RUNNER | 7 | 13% |
| 2020 4RUNNER | 2 | 6% |
| 2019 4RUNNER | 3 | 5% |
| 2018 4RUNNER | 5 | 9% |
| 2017 4RUNNER | 2 | 6% |
| 2016 4RUNNER | 7 | 9% |
| 2015 4RUNNER | 8 | 9% |
| 2014 4RUNNER | 8 | 10% |
| 2013 4RUNNER | 2 | 6% |
| 2012 4RUNNER | 2 | 2% |
| 2011 4RUNNER | 9 | 6% |
| 2010 4RUNNER | 12 | 8% |
Other reported problem areas on the 2006 Toyota 4RUNNER
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.