214 complaints reported

2004 Toyota 4Runner Structure

Owner-reported problems and safety issues filed with NHTSA. Review common failures, severity levels, and complaint trends over time.

Reports
214
Crashes
1
Fires
1
Injuries
0

Complaint Timeline

Chronological view of owner reports

Aug 2025

The contact owns a 2004 Toyota 4Runner. The contact stated that while the vehicle was in for service, the independent mechanic discovered rust on the front driver's side subframe. Additionally, the subframe had developed holes due to rust. The cause of the failures was not yet determined, and the vehicle was not yet repaired. The manufacturer and local dealer were notified of the failure, but no assistance was offered. The failure mileage was 120,000.

Type: Vehicle, Vehicle: 2004 TOYOTA 4RUNNER, Manufacturer: Toyota Motor Corporation
Incident: Aug 2023
Aug 2025

The contact owns a 2004 Toyota 4-Runner. The contact stated that the frame was severely rusted. The vehicle was not diagnosed or repaired by an independent mechanic or a dealer. The manufacturer was notified of the failure and referred the contact to the NHTSA Hotline for assistance. The failure mileage was approximately 108,000.

Type: Vehicle, Vehicle: 2004 TOYOTA 4RUNNER, Manufacturer: Toyota Motor Corporation
Incident: Aug 2025
Jul 2025

Extensive frame rust to the point of structural failure. Cannot support weight or force.

Type: Vehicle, Vehicle: 2004 TOYOTA 4RUNNER, Manufacturer: Toyota Motor Corporation
Incident: Nov 2024
Jun 2025

Frame rust. Huge problems on the 4th gen 4runners. Can't believe there's not a recall on this issue.

Type: Vehicle, Vehicle: 2004 TOYOTA 4RUNNER, Manufacturer: Toyota Motor Corporation
Incident: Jan 2025
Feb 2025

The undercarriage is full of rust that the repair shop will not test drive or fix due to the issue. No warnings.

Type: Vehicle, Vehicle: 2004 TOYOTA 4RUNNER, Manufacturer: Toyota Motor Corporation
Incident: Oct 2022
Sep 2024

Undercarriage frame rusted to the point where structural rust was formed in various places This rust has made a whole and cracks to the frame causing my vehicle to become a safety hazard on the road

Type: Vehicle, Vehicle: 2004 TOYOTA 4RUNNER, Manufacturer: Toyota Motor Corporation
Incident: Sep 2024
Dec 2023

The frame of the vehicle rust just as same as the 03-09 Tacoma and there is nothing I can do the fix it and if I get new parts it ruins my Parts after a short period of time

Type: Vehicle, Vehicle: 2004 TOYOTA 4RUNNER, Manufacturer: Toyota Motor Corporation
Incident: Dec 2023
Sep 2023

The contact owns a 2004 Toyota 4Runner. The contact stated that while the vehicle was in for routine service, it was discovered that the subframe had sustained severe rusting and corrosion. The contact indicate that there was a hole going through the subframe while the vehicle was being lifted at the service center. The local dealer and manufacturer were notified of the failure and informed the contact that the VIN was no longer covered under the Manufacturer’s Extended Warranty coverage for the failure. The approximate failure mileage was 146,000.

Type: Vehicle, Vehicle: 2004 TOYOTA 4RUNNER, Manufacturer: Toyota Motor Corporation
Incident: Jan 2023
Jul 2023

Frame and body prematurely and aggressively rusted despite constant care and upkeep. Toyota recalled the exact frame on their Tacoma of the same years and did not recall the 4runner frames. It’s criminal and dangerous to the user and other vehicles on the road.

Type: Vehicle, Vehicle: 2004 TOYOTA 4RUNNER, Manufacturer: Toyota Motor Corporation
Incident: May 2022
Apr 2023

Rusted frame

Type: Vehicle, Vehicle: 2004 TOYOTA 4RUNNER, Manufacturer: Toyota Motor Corporation
Incident: Apr 2023
Mar 2023

The frame of my Toyota 4-Runner has developed holes making it dangerous to drive.

Type: Vehicle, Vehicle: 2004 TOYOTA 4RUNNER, Manufacturer: Toyota Motor Corporation
Incident: Mar 2023
Feb 2023

The contact's mother owns a 2004 Toyota 4-Runner. The contact stated that after the vehicle was taken to an independent mechanic for a routine oil change, his mother was made aware that the subframe had excessive corrosion, and that the subframe needed to be replaced. The mechanic informed the contact's mother that the vehicle was not safe to drive. The vehicle was not repaired. The manufacturer was not made aware of the failure. The failure mileage was 180,330.

Type: Vehicle, Vehicle: 2004 TOYOTA 4RUNNER, Manufacturer: Toyota Motor Corporation
Incident: Feb 2023
Dec 2022

The frame is rusted through on this 4Runner. Same frame as the tacomas that were recalled and I’m wondering why Toyota wouldn’t recall THE SAME EXACT FRAME WITH MAJOR RUST ISSUES on a different platform. This truck is not abused so it’s very frustrating to see it falling apart at the frame when everything else is intact and solid. The rot on this frame is inevitable. I’m going to be very upset if I have to pay out of my own pocket for something that should be 100% covered under recall. This is a huge safety hazard and could lead to serious injury or death.

Type: Vehicle, Vehicle: 2004 TOYOTA 4RUNNER, Manufacturer: Toyota Motor Corporation
Incident: Nov 2022
Nov 2022

The body is excessively rusted through. Other vehicles this age or older do not have any where near the amount of excessive rust and holes. Parts have fallen off. Anytime the shop has to work on the truck, there is a pile of rust under it. Broken off rust poses a hazard to owner and others on the road as debris. Known issue on an uncoated frame.

Type: Vehicle, Vehicle: 2004 TOYOTA 4RUNNER, Manufacturer: Toyota Motor Corporation
Incident: Nov 2022
Oct 2022

Unaware of frame rusting issues to vehicle.. Observed rust through carpet on driver side. Upon research safety is a concern. Due to high volume of this type of issuing occurring a safety recall should be issued. It was not verbalized at time of purchase the make and model of vehicle have these type of issues. Especially, when this issues had been occurring prior to purchase of this vehicle.

Type: Vehicle, Vehicle: 2004 TOYOTA 4RUNNER, Manufacturer: Toyota Motor Corporation
Incident: Oct 2022
Sep 2022

The frame is showing significant rust damage throughout the frame. A hole was punctured in the passenger side while using the factory bottle jack. This could have ended badly if someone was underneath when this happened. Furthermore there is deterioration on the front and rear sections that are questionable as to their integrity and resilience in the event of a crash. It is generally accepted by other owners of this generation that lack of adequete drainage throughout the frame has led to water pooling inside and creating excessive rust issues from the inside out.

Type: Vehicle, Vehicle: 2004 TOYOTA 4RUNNER, Manufacturer: Toyota Motor Corporation
Incident: Sep 2022
Sep 2022

The body frame is the problem, it has rust all around, the radiator supports are all rusted out almost hanging, front side of the frame and rear side are clearly rusted. Radiator could fall any time. The problem was confirmed by auto shop and inspection shop (independent service center). Vehicle has not been inspected by police or insurance representatives. There were no warning lights or symptoms prior to frame failure, for now.

Type: Vehicle, Vehicle: 2004 TOYOTA 4RUNNER, Manufacturer: Toyota Motor Corporation
Incident: Sep 2022
Aug 2022

The frame of my 2004 Toyota 4Runner, which is manufactured by Dana Holding Corporation, is the primary support structure of my vehicle, to which every piece is attached. It is the main protection against injury in a car accident. The excessive rust corrosion of the frame on my Toyota 4Runner greatly hinders the safety, crash-worthiness, and stability of my automobile, as transmission mounts, essential suspension components, and engine mounts are attached to it. Consequently, as it becomes affected by rust, it is significantly more prone to failing to protect me, the driver, in a car accident, and, furthermore, it can also cause serious accidents in and of itself. Depending on the gravity of the impact, not only myself but my passengers (my young children) can experience a wide range of injuries and even death. Because the excessive rusting of the undercarriage of my Toyota 4Runners can cause plenty of vehicle components to fail, there can be multiple causes for an accident. The following are the most common injuries people sustain after a car accident: traumatic brain injuries severe whiplash fractured bones lacerations spinal cord damages paralysis loss of limbs permanent scarring concussions internal bleeding head injuries face injuries compound fractures soft tissue damage back injuries dislocated bones knee injuries shoulder injuries herniated disc psychological injuries Unlike in the case of other models of your vehicles, Toyota Motor Corporation refused to address the problem of 4Runners. Interestingly, your company faced a previous lawsuit in 2016 concerning the same rusting problem in the Tacomas, Sequoias, and Tundras, and it was settled for $3.4 billion in 2020. Nonetheless, your company did not admit it manufactured defective vehicles. According to documentation, Toyota Motor Corporation had been aware of the issue of premature rusting of the undercarriage of their 4Runners for a long time but continued to manufacture and sell defective vehicles.

Type: Vehicle, Vehicle: 2004 TOYOTA 4RUNNER, Manufacturer: Toyota Motor Corporation
Incident: Aug 2022
Jun 2022

Extreme Rusting on the frame undercarriage of the vehicle. Our mechanic found it today - said it must have been rusting for years & that this is a common problem with 03 - 05 Toyota 4Runners.

Type: Vehicle, Vehicle: 2004 TOYOTA 4RUNNER, Manufacturer: Toyota Motor Corporation
Incident: Jun 2022
Mar 2022

Under body has severe frame damage from rust.

Type: Vehicle, Vehicle: 2004 TOYOTA 4RUNNER, Manufacturer: Toyota Motor Corporation
Incident: Jul 2021
Oct 2021

Took vehicle for service a couple of days ago. Mechanic would not work on the vehicle due to extensive frame rust and corrosion. Mechanic said he could push his finger through some of the rusted frame members. Extensive frame rust/corrosion on at least 3 sides of the vehicle and sagging frame in the front per mechanic.

Type: Vehicle, Vehicle: 2004 TOYOTA 4RUNNER, Manufacturer: Toyota Motor Corporation
Incident: Oct 2021
Aug 2021

Original owner of 2004 Toyota 4Runner SR5 (purchased February 23, 2004). Garage kept and approximately 125,000 miles. Vehicle was taken to mechanic for exhaust issues and reported the flange had rusted and disintegrated providing $2300 quote to repair. Taken to a second shop that indicated rust on frame and sub-frame was significant and would not accommodate an exhaust repair. Also stated that bolts and supports for radiator and gas tank were severely rusted. Estimates the car to be road worthy for an additional 3-6 months.

Type: Vehicle, Vehicle: 2004 TOYOTA 4RUNNER, Manufacturer: Toyota Motor Corporation
Incident: Sep 2021
Aug 2021

Severe rusting of body frame

Type: Vehicle, Vehicle: 2004 TOYOTA 4RUNNER, Manufacturer: Toyota Motor Corporation
Incident: Aug 2021
Aug 2021

TOYOTA MADE GARBAGE BOXED IN FRAMES AND NOW MY TRUCK WON'T PASS INSPECTION

Type: Vehicle, Vehicle: 2004 TOYOTA 4RUNNER, Manufacturer: Toyota Motor Corporation
Incident: May 2021
Jul 2021

My Frame is a rusted mess. The entire frame is experiencing rust issues. My rear sway bar rusted off and broke into pieces (1/15/21). Now my exhaust pipe has fell off the muffler due to rust (7/21/21). My brake calipers have been very badly rusted as well as the pieces that hold my shocks and suspension in place. It has been progressively getting worse over the past 3-4 years. I feel like this has now become a safety issue and I'm not sure if it's safe to drive. It may be a risk to myself and other drivers on the road. My mechanic has told me that it will not improve and he thinks that the frame and other parts should be recalled. I have plenty of photos if needed. Please help me before something goes wrong.

Type: Vehicle, Vehicle: 2004 TOYOTA 4RUNNER, Manufacturer: Toyota Motor Corporation
Incident: Jul 2021

Trend Over Time

Complaints by year

Quick Summary

The 2004 Toyota 4Runner has 214 Structure complaints on file. 1 crashes have been reported. Review the timeline above for detailed owner experiences.