Problems · by component
2003 Toyota 4Runner structure problems
285 owner complaints to NHTSA about the 2003 Toyota 4Runner cite structure, 40% of all 708 complaints for this model year.
Complaints
285
40% of all complaints
Crashes
3
Reported by owners
Fires
0
Reported by owners
Injuries
0
Reported by owners
What owners say about the structure
Verbatim from NHTSA complaints, newest first
“Toyota has had issues with their frames rusting out and the 4th generation 4Runner is not exempt from this issue. My 2003 is requiring extensive work to keep it on the road safely due to frame rust. A recall to replace frames should be in place.”
“There is major corrosion on the chassis, brake-power steering-transmission lines, and all metal brackets on the frame and engine. The corrosion is so bad there is holes on the chassis. Known issue, many complaints, Toyota Corp. says to keep calling back maybe something will be done in the future. Unable to upload photos!”
“The contact owns a 2003 Toyota 4Runner. The contact stated that upon taking the vehicle to several independent mechanics for servicing, he was informed that the subframe was significantly corroded and needed to be replaced. The vehicle was not repaired. The dealer was not notified of the failure. The manufacturer was notified of the failure and informed the contact the vehicle was not covered under recall. The failure mileage was approximately 115,000.”
“The contact owns a 2003 Toyota 4Runner. The contact stated that while the vehicle was at the tire retailer for tire replacement, the technician informed him that the subframe was corroded. The vehicle was then taken to an independent mechanic, who diagnosed that the passenger's side front and rear subframes were severely corroded, as well as the cross member. The mechanic advised the contact to stop driving the vehicle. The dealer was made aware of the failure and informed the contact that there was no recall associated with the VIN. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was approximately 165,000.”
“I purchased this 2003 Toyota 4Runner in 2018 under what I assumed was prime condition, for a vehicle that spent the majority of its life in Nebraska/Kansas before I moved to Texas in 2021. At 87,400 miles at the time of purchase, the vehicle had no visible damage to the exterior besides a few paint chips, some minor hail damage and scratches, and some easily fixed surface rust in the paint on the tailgate. The previous owner had driven it leisurely and had kept the miles low after 15 years. The car has had some mechanical issues, but nothing out of the ordinary outside of some regular maintenance over the first few years. Being close to 100,000 miles, the timing belt and pump was replaced around 98,000 miles. Other issues have been fixed periodically, please reference the attached files. After joining a Toyota 4Runner 4th Generation Facebook group and seeing a post about another's issues with rust damage in October 2020, I decided to take a look at my own frame. I then inspected my own vehicle, and found significant frame rot damage. It is extensive, with significant rust to the frame, with large holes and soft patches that question the integrity of the frame…”
“Excessive frame rust causing difficulty to keep vehicle on the road. No warning lamps, I noticed the rust starting years ago, now the rust is so bad that the frame is rusted through causing difficulty steering and loud crunch noises. I contacted Toyota Consumer Affairs explaining the rust concern and asked if I needed to take the vehicle to a dealership for inspection, they said it wasn’t necessary (sounds like they don’t want to admit the existence of a possible manufacturing defect). The vehicle is available for inspection. I feel like I would be doing a disservice to society if I continue to drive this vehicle on public roads due to the danger of injuring a pedestrian or another motorist.”
Showing 6 of 285 reports. Read every report on NHTSA.gov.
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 11, 2026NHTSA vehicle page
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.