2005 Toyota 4Runner Body & structure Problems

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.

NHTSA ID

11737968

Incident

May 5, 2026

The contact owns a 2005 Toyota 4Runner. The contact stated that while driving at an undisclosed speed, the vehicle briefly hesitated and was unable to accelerate, prompting the contact to discontinue driving the vehicle. The check engine warning light was illuminated. The vehicle was taken to an independent mechanic, who diagnosed a failure with the catalytic converter. The contact was also made aware that the mechanic discovered excessive corrosion covering the entire subframe of the vehicle. The contact was advised not to drive the vehicle. The vehicle was not repaired. The manufacturer was notified of the failure but provided no assistance. The failure mileage was 205,000.

NHTSA ID

11678278

Incident

Aug 4, 2025

Mileage

205,000 mi

- The undercarriage and frame have had premature rusting for years. The car is otherwise in excellent condition due to my care of it over the last 20 years. 5 years ago, a service person at my local Toyota dealership said, "I'm really disappointed in Toyota, I've never seen rust like this." I have now recently been told by a local service shop that it's time to get a new car. The lines are all corroded for the power steering, etc, and he was unable to even "touch them," and said that the rust issue is no longer safe, and we shouldn't drive far from home. - We are now unable to drive the car much, as we live in the country and have far communities. With a [XXX] , we are unwilling to drive the car over 45 mph, or more than 10 miles for fear of an accident after reading about the manufacturing defect in this model of the 4-Runner. - It has not been inspected by the above stated people. - no warnings, I would not have know the vehicle had such severe premature rusting issues if it weren't for a service person telling me such. -My vehicle has under 140k miles on it, and I've taken exceptional care of it over the past 20 years. I could have sold it for 10k given its condition, and low mileage, but it is now likely worth nothing given the manufacturing defect which caused premature rusting. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

NHTSA ID

11672178

Incident

Jun 1, 2025

When I first saw the pictures on the internet, I noticed that the front underside appeared to have rust issues. (Frontal shot) I contacted that sales person and he blew me off when I requested photos of the underbody. After several attempts, he finally sent a couple of pictures. The pictures obviously did not show the major rust issues as I have provided. The pictures were carefully fabricated not to show the major rust issues. It was apparent that the vehicle was taken off the internet while they hid the rusty underbody by applying some coating. A short time later, the dealership reposted the vehicle on their website. The vehicle was not properly advertised as having this major rust issue. I asked the salesman if his family was driving the vehicle, would he feel safe. He replied, "Absolutely". With this said, I decided to purchase the vehicle. Also, my signature is not on the "We owe". Also, the vehicle has an exhaust leak from the manifold area. It makes a loud ticking noise. This is going to cost approximately $1,500 to fix. The air conditioner is not blowing cold and either has a leak or in need of freon. This is another repair out of my pocket. This is what kind of pre-owned vehicle they sold me. This vehicle should have never been listed for sale.

NHTSA ID

11669643

Incident

May 15, 2024

Frame rot. The frame on the 4Runner is a known problem for excessive rot. My frame is shot. There is no reason a frame on a 2005 should be rotted. I was advised by my mechanic that my frame is dangerously close to snapping in half. This needs fixed by Toyota!

NHTSA ID

11663092

Incident

Nov 13, 2024

Under frame is rusted. The area between the doors in the passenger side is gone. only the top face of the member is present.

NHTSA ID

11637811

Incident

Jan 22, 2025

Frame has very severe rust and has started to come part in places. Soon vehicle will no longer be road worthy.

NHTSA ID

11609376

Incident

Aug 19, 2024

The contact owns a 2005 Toyota 4Runner. The contact stated that the subframe was rusted. The TPMS warning light was illuminated. The vehicle was taken to an independent mechanic, who repaired the TPMS, but the failure persisted. The vehicle was taken to the local dealer, where it was diagnosed that the frame was rusted and recommended that the vehicle no longer be driven. The mechanic referred the contact to the manufacturer. The vehicle was not repaired. The manufacturer was contacted and referred the contact to the NHTSA Hotline. The failure mileage was approximately 200,948.

NHTSA ID

11560604

Incident

Dec 15, 2023

Mileage

200,948 mi

Frame of the vehicle is showing rust corrosion. The frame are the same as the tacomas that were released the same year. The tacomas were granted frame replacement by Toyota but 4Runners weren’t. Noticed a lot of other 4th generation 4Runners are having the same issues.

NHTSA ID

11553471

Incident

Nov 3, 2023

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.

NHTSA ID

11520258

Incident

Apr 19, 2023

Mileage

166,000 mi

Frame on 2005 Toyota 4Runner has excessive rust due to Toyota’s negligence on frame production. I can make it available if needed. My safety is 100% compromised, had my mechanic not have told me of the issue, I would have kept driving the vehicle and the suspension could have detached from the frame at any point. The problem has been confirmed by my independent service center South Lake Automotive. It has not been inspected by police, manufacturer or other. There was no warning prior to the failure. Had I not had it pointed out as an issue, I would never have known it was an issue.

NHTSA ID

11488093

Incident

Sep 19, 2022

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.

NHTSA ID

11483876

Incident

Sep 1, 2022

Frame of the vehicle is rusting from the inside out. Upon inspection, holes in the frame are found, with many more hidden from sight. This is a disaster waiting to happen. This puts the driver and anyone else on the road at extreme risk if the frame breaks while driving. This problem is well documented with Toyota, and they have previously replaced Tacoma, Sequoia, and Tundra frames, but not 4runners. Everyone is at risk with these frames, even if it does not appear so. My frame looked solid until I began hitting it with a hammer and screwdriver and breaking away very weak spots of metal.

NHTSA ID

11472212

Incident

Jul 3, 2022

I took my vehicle into the Toyota Dealer after mechanic told my frame was rusting. The dealership confirm the frame is rusted. The frame of the vehicle should not be rusting out.

NHTSA ID

11466079

Incident

May 25, 2022

I own a 2005 Toyota four runner. The frame under the truck is completely rusted out everywhere. The car started swaying and I felt as though my vehicle was going to go out from under me. It felt like it was collapsing or melting underneath. This is my family vehicle. It was a dangerous situation and my entire family was in the vehicle. My spouse a children. I took it to a independent shop. The mechanic said that the frame had rusted out under the Toyota. He told me to park it and not drive it because it was about to split apart. He said that we were very lucky and just moments from a catastrophe. He also told me that their had already been a recall and replacement of the malfunctioning frames on Toyota Sequoia, Tacoma and tundra. In his professional option he thought Toyota should do the same type recall for the rusted out frame problem on the four runner. You are the first and only person I have reported this to. I will wait for your response and next steps: [XXX] Cell number [XXX] Home number [XXX] [XXX] INFORMATION Redacted PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6).

NHTSA ID

11461022

Incident

Apr 4, 2022

The rear control arm broke while I was driving causing me to swerve uncontrollably and almost causing a collision

NHTSA ID

11457890

Incident

Aug 12, 2021

I have a 2005 4Runner with significantly rusted out frame that makes me worried about safety of driving it. I feel the amount of corrosion present is way beyond what I would expect for that year of vehicle

NHTSA ID

11451105

Incident

Feb 7, 2022

The frame broke loose from the rear sway bar due to excessive rust while I was driving it. My 4Runner is an 05 and has the same frame as the Tacomas of the same year, except with no recall. I believe it is wrong to recall the Tacoma frame and not the same 4Runner frame. It is available for inspection. The car wanted to loose control anytime the accelerator was pressed or released. The problem has been an issue for many 4Runner owners of similar years. There was no warning to this occurrence.

NHTSA ID

11442604

Incident

Nov 30, 2021

My 2005 4Runner frame is completed covered in rust and is corroding. Several places on the frame is rotting away.

NHTSA ID

11441407

Incident

Nov 22, 2021

Extreme rusting on frame and all parts under the carriage. Vehicle suspension and all moving parts underneath could fail or fall apart causing major accident or death to me or other vehicle.

NHTSA ID

11441149

Incident

Nov 20, 2021

The contact owns a 2005 Toyota 4Runner. The contact stated that after purchasing the vehicle, it was discovered that the subframe of the vehicle was severely rusted. The cause of the failure was not determined. The manufacturer and local dealer were notified of the failure. The failure mileage was 212,000.

NHTSA ID

11440902

Incident

Nov 14, 2021

Mileage

212,000 mi

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.

NHTSA ID

11435632

Incident

Sep 22, 2021

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.

NHTSA ID

11431129

Incident

Aug 1, 2021

Extreme frame rusting completely thru at the point of being unsafe and unable to put the truck on a lift for any repairs. A number of SAE mechanics warned me about driving this truck due to the extreme frame rusting. Sections almost completely separating apart. I have rust proofed and undercoated the under carriage at least three times. Toyota should make good on their negligence to properly rust coat their frames at times of manufacturing.

NHTSA ID

11429191

Incident

Aug 15, 2021

Frame and rear differential rust- extreme

NHTSA ID

11429160

Incident

Nov 9, 2018