2005 Toyota 4Runner Owner Complaints

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

Odometer Fraud. The contact purchased a 2005 Toyota 4Runner. It was discovered that there was a mileage discrepancy. The vehicle was a private sale. At the time of purchase, the vehicle mileage was 217,000, and at the time of registration, it was discovered that the mileage was 342,912.

NHTSA ID

11714323

Incident

Nov 3, 2025

Mileage

342,912 mi

Premature/unsafe frame rot

NHTSA ID

11703363

Incident

Dec 5, 2025

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

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. There are also 4runners on dealership lots that have significant rust, holes, and cracks in the frames that the dealership does not warn about, rather, they still have high for-sale values because the vehicle looks good otherwise.

NHTSA ID

11663625

Incident

May 28, 2025

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

Rear hatch glass broke during defroster operation. Started to smell a burning smell and then moments later the entire rear hatch glass shattered. Known issue by Toyota. They issued a brief Warranty Enhancement Program (ZG7) in March 2017 thru April 2018 but are refusing to honor current issues.

NHTSA ID

11563696

Incident

Jan 5, 2024

Excessive frame rusting. There are holes in the frame from rusting. At this point in time there isn’t anything I can do about the issues. Frame is unrepairable.

NHTSA ID

11562313

Incident

Dec 7, 2023

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 rear window shattered while using the rear window defrost.

NHTSA ID

11553019

Incident

Nov 1, 2023

Frame has rusted through and the boot of the frame that holds the front driver side suspension is 3/4 of the way cracked. Independent Body shop rendered car unsafe to drive.

NHTSA ID

11531483

Incident

Oct 20, 2022

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

The rear windshield shattered suddenly without any apparent reason. At first I thought something had smashed onto our car because there was a loud smashing sound as it a sheet of ice fell on the roof of the car, but it was not a snowy or icy day and there was no rock or branch by the car. It was rainy and cold and I had the wipers and defroster on so the only thing I could think of as the problem was the temperature of the glass and defroster caused the glass to shatter. I had all three of my children in the car (all under 6 years of age) in the backseat and I was lucky none of the shattered glass projected into the air on to them. The entire windshield was shattered.

NHTSA ID

11498612

Incident

Dec 22, 2022

The contact owns a 2005 Toyota 4Runner. The contact stated that while her brother-in-law was inspecting the vehicle battery, he activated the rear windshield defroster and the rear windshield exploded. There were no injuries sustained. The vehicle was taken to an auto glass repair mechanic, where it was diagnosed that the defroster motor and the rear windshield wiring had melted. The auto glass repair mechanic replaced the rear windshield and referred the contact to the dealer for the defroster motor replacement. The dealer was not notified of the failure. The vehicle was not repaired. The manufacturer was made aware of the failure and informed the contact that there was no recall associated with the VIN. The failure mileage was approximately 170,000.

NHTSA ID

11489152

Incident

Sep 24, 2022

Mileage

170,000 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

The frame and complete undercarriage is completely prematurely rusted.

NHTSA ID

11486056

Incident

Sep 23, 2022

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.

NHTSA ID

11484406

Incident

Mar 25, 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

I was driving my 4Runner and the rear glass exploded and shattered. This is a known issue with Toyota and documented in T-SB-0189-17 and warranty enhancement ZG7. There were no warning lamps, messages or other symptoms of the problem prior to the glass shattering. Toyota refuses to cover the repair costs and the estimate provided by the dealer is $1,200. Photos were taken in my garage when I got home immediately after the explosion occurred.

NHTSA ID

11482995

Incident

Aug 6, 2022

Upon moving with the flow of traffic at about 30 to 35 mph a car shot from a driveway straight in front of me causing me to hit that driver in the rear quarter panel of the passenger side putting him into a 360 spin not causing my airbags to deploy at that rate of speed in my opinion that is a huge fault of my system from my vehicle at that rate of speed my airbags should have went off to protect me as if I didn't have my seat belt on but thank God I always wear my seatbelt

NHTSA ID

11482831

Incident

Aug 27, 2022