Which parts fail
Components named in complaints (struts, shocks, control arms, ball joints, springs).
Mileage when the problem started
Owner reports
Selected complaints filed with NHTSA by 2005 Toyota 4Runner owners, lightly cleaned up (personal details are redacted by NHTSA).
The contact owns a 2005 Toyota 4Runner. The contact stated that upon taking the vehicle to an independent mechanic, she was informed that significant corrosion had developed on the front end of the undercarriage. The contact was then referred by the independent mechanic to the dealer where she was informed that while was rust found on the undercarriage of the vehicle, the vehicle was safe to operate and no repairs were needed. A month after the dealer inspection, the contact stated that an abnormal sound was coming from her brake pedal upon depression without warning. Once the contact made it home, she had the vehicle towed to an independent mechanic. The mechanic initially informed her that the vehicle was a total loss however, he and another mechanic were able to remove a large portion of the rust and replaced the brake pads, rotors, power steering line, hose, and brake pads. …
The contact owns a 2005 Toyota 4Runner. The contact stated that while the vehicle was receiving maintenance work from an independent mechanic, the mechanic informed the contact that the sub frame was very rusted. The mechanic was unable to complete the maintenance work. The vehicle was taken to a dealer where they provided the contact an estimate for the repair. The vehicle was not repaired. The manufacturer was not notified of the failure. The approximate failure mileage was 142,500.
The contact owns a 2005 Toyota 4Runner. The contact stated while the vehicle was at the independent mechanic for servicing, and he was informed that the sub frame was severely corroded. The dealer was notified of the failure and referred the contact to the manufacturer. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The vehicle was not repaired. The failure mileage was approximately 166,000.
ENTIRE body frame has excessive rust, holes, and cracks. It is available for inspection. Toyota dealership says it is safe to drive for now but it is failing. I feel any cracks, rust, holes, separation of frame components places all occupants and anyone near the vehicle at risk for when anything fails - this could be when the vehicle is on the expressway in motion (such as when the GM ignition switch failures happened), causing catastrophic loss of life, injuries, and damage to all. It's not a matter of "if" it happens, it's "when" it will happen. There are no warning lamps, messages, or other symptoms of the problem. The exterior, interior, braking, engine of the vehicle are in remarkable shape so it's very misleading. …
I have a 2005 Toyota 4runner with frame rust that has caused everything under my 4runner to rust. Toyota knows these frames have problems with rust and corrosion and have done nothing, I am far from being the only one with this complaint or problem. It is up for inspection anytime. I have taken it to get work done at shops and been turned away because of the amount of rust on all bolts, lines, all metal under truck causing it to be a liability. I cant even get my skid plates off to fully address the issue. The metal is starting to split on the main frame by the tire, it is rotting from inside. Rust has always been there but last couple years has gotten really bad. So much rust my gas tank strap has broken but so much rust I cant get the skid plate off to fix it.
My frame has rotted through, causing the rear bump stops to fall off, putting excessive wear on both frame and suspension components. In parts of the frame, it has rotted all the way around and caused a loss in structural integrity. Worst of all, there is a hole near the rear most strap holding the gas tank to the chassis, which is a risk to not only me and my pregnant wife but others driving on the road around me if it where to fall off. Looking at the body, there is no rust or corrosion. The same goes for the engine bay, the rust is entirely located on the frame. Mechanically, the vehicle is in excellent shape. It has now got to the point it will no longer pass a NYS inspection.
Vehicle's frame and suspension is showing major rust prematurely forming from the inside-out of the frame causing visible weakness in the structure of the frame that could cause engine or other suspension parts to fall off the frame of the car due to improper treatment of the frame. If I were to get in a car accident I don't see the frame holding it's structure. I would I highly suggest to have a safety recall done with frames with such damage.
Brought the car in for an alignment and I was told they couldn't do it because of all the damage to the frame from rust, parts of the frame are not even there anymore, the front row hooks are gone, they said that all this damage ca impact the handle of the car and that it can't be properly aligned and possibly won't pass inspection.
Upon recent inspection of my vehicle, it was noted that the frame is severely corroded and rusted to the point where collapse or breaking of the frame is possible while driving. Apprently the frame was not properly treated for rust protection and can now be unsafe for driving. Enclosed are pictures of the rusted frame.
The frame on both sides of the vehicle in the front, where it connects under the radiator crossbar has rusted through.Not feeling to safe about this. also the transmission cooling lines are also looking thin. The dealership I have maint. done at informed me of this condition. Can send pictures if needed.
Suspension complaints in other 4Runner years
Frequently asked questions
How common are suspension problems on the 2005 Toyota 4Runner?
NHTSA has 77 complaints about the suspension of the 2005 Toyota 4Runner, 18% of the model year's 425 complaints. The component named most often is rear › springs › air suspension system › springs/bags (1 mentions).
Is there a recall for 2005 Toyota 4Runner suspension problems?
No. NHTSA lists no suspension recall for the 2005 Toyota 4Runner, though it has 5 recalls for other components. If the problem is widespread, a repair may still be covered by an extended warranty or a manufacturer service bulletin — ask a dealer.
At what mileage do 2005 Toyota 4Runner suspension problems start?
Half of the complaints with a recorded mileage happened before about 130,000 miles, and 6% before 25,000 miles.
Is it dangerous?
Owners linked 1 crash, 0 fires and 1 injury to suspension problems on this model year. If you notice symptoms, have the car checked before driving further.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.