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CarComplaints.com Notes: Although it has a stellar record in terms of vehicle problems, initially the 4th generation (2003 - 2009) 4Runner didn't earn our top "Seal of Awesome" rating because it received poor crash test ratings for rear impacts. However it's proven to have one of the lowest driver death rates out of all vehicles (not just SUVs), so we've bumped it back up to our top award.

10.0

really awful
Crashes / Fires:
3 / 0
Injuries / Deaths:
0 / 0
Average Mileage:
84,112 miles

About These NHTSA Complaints:

This data is from the NHTSA — the US gov't agency tasked with vehicle safety. Complaints are spread across multiple & redundant categories, & are not organized by problem.

So how do you find out what problems are occurring? For this NHTSA complaint data, the only way is to read through the comments below. Any duplicates or errors? It's not us.

2006 Toyota 4Runner suspension problems

suspension problem

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2006 Toyota 4Runner Owner Comments (Page 1 of 4)

problem #62

May 082024

4Runner

  • miles

A D V E R T I S E M E N T S

UNKNOWN, found excessive rust on undercarriage

- Sugar Land, TX, USA

problem #61

Jun 242023

4Runner

  • miles
My control arm ripped completely off my fram on the passenger side due to excessive rust putting me and my family and any one else on the road at risk of something catastrophic.

- Horseheads, NY, USA

problem #60

Jul 062022

4Runner

  • miles
My car is a 2006 Toyota 4Runner. This past summer I had a tire leaking and took it to the garage for repair. The mechanic stated that the frame is rusting out in the front right, tire rod area, and saw a pinhole. Last week I took the vehicle to get a transmission oil change. That mechanic saw that there's more rust that is spreading throughout the entire frame, worse than the area found from just a few months ago. I learned online that Toyota had purposely used cheap steel for the frame and had replaced the same frame used on other trucks such as the Tacoma and Highlander but is refusing to replace the 4Runner. These rusted out frames are affecting many 4Runners. I have a 1964 Cadillac and that frame is in better condition than the 4Runner. I'm forced to pay $15,000 to replace the frame or salvage my car. It shouldn't have come to this, especially when the same frame that was replace on other trucks isn't being replaced for mine.

- Methuen, MA, USA

problem #59

Sep 032022

4Runner

  • miles

A D V E R T I S E M E N T S

I have a 2006 Toyota 4Runner. I also have a 2005 GMC Sierra, but this 4Runner's frame is absolutely toast, while the GMC is completely fine. Toyota issued recalls on the tacoma, tundra, and the sequoia, so why not the 4Runner? My car started swaying and violently shaking on the highway. I pulled over and looked underneath, only to see the rear section of the frame had completely disconnected. This could have caused a major accident or even death if I did not catch it soon enough. This is a MASSIVE safety issue, and if people do not know what to look for with these, Toyota will be seeing a lot of wrongful death lawsuits.

- Warren, RI, USA

problem #58

Apr 222022

4Runner

  • miles
Vehicle failed inspection due to rust on the frame. Bought vehicle because it is supposedly ruggedly built and for the frame to rust out when the vehicle has 103k miles and not driven off-road for more than a few times since we owned it is ridiculous. Dealer quoted $11k for the frame alone, not including labor. The fact this vehicle shares the platform with the Tacoma which was recalled for frame does not make sense. Vehicle was inspected last year (Virginia requires annual safety inspections), so given the amount of rust discovered makes me doubt whether or not the Toyota dealership did a thorough job inspecting the vehicle last year. We don't drive the vehicle that much so it doesn't make sense that it would rust som significantly.

- Chantilly, VA, USA

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problem #57

Mar 262022

4Runner

  • miles
Since an inspection Oct 2021 the rust/corrosive on the frame has become. Dangerously close to rotting thru the entire frame! It-??s not driven in the winter months when snow or ice melt (salt) is on the roads to prevent situations like this. With only 75,000 miles always garage kept and maintained like it-??s brand new this vehicle might be able to be saved for a model in a shop class to practice welding. Something needs to be done because this ifvvjj

- Custer, MI, USA

problem #56

May 172015

4Runner

  • miles

A D V E R T I S E M E N T S

The Frame and Suspension Components of the vehicle have corroded or rusted badly and prematurely even though the rest of the vehicle is in excellent condition. This is a known and common occurrence with the 4th Generation Toyota 4Runner Vehicles such as this 2006 model. - Currently the upper Rear Differential Stabilizer Arm has completely rusted off causing handling problems with the vehicle. Many areas of the frame are rusted through making it difficult to jack up or raise the vehicle on a hoist. - Problem has been observed and reported by Dealer(s) and Independent Shops I have visited. - This has NOT as yet been inspected by manufacturer representatives other than dealers. - This first appeared in late 2012 when I purchased the vehicle used with approx. 75,000 miles. - In May 2015 I struck a deer with the vehicle travelling on a US Trunk Hwy and the rust problem was reported as being severe by the body shop who repaired the front end damage. Note: The corrosion, in my opinion, did NOT cause the accident with the deer.

- Pequot Lakes, MN, USA

problem #55

Nov 242021

4Runner

  • miles
My 2006 Toyota 4 runner, I've found a large amount of rust through out the frame of the vehicle. I feel the vehicle is not safe to drive. Toyota has frame replacement recalls to the Tundra, and sequias but not the 4runner. I feel this is an issue that Toyota is aware of. I also feel that something should be done for manufacturing a vehicle with defective chassis.

- Greenville, NC, USA

problem #54

Oct 272021

4Runner

  • miles
machanic noticed rust when took in for service frame is thru and thru with rust damage especially at rear torsion bars NOT safe to drive

- Verona, KY, USA

problem #53

Nov 012020

4Runner

  • 134,000 miles
The contact owns a 2006 Toyota 4Runner. The contact stated that while driving approximately 25-35 MPH, the control arm detached. The contact was able to drive the vehicle to her residence. The vehicle was taken to an independent mechanic where the control arm was replaced. The local dealer was not contacted. The vehicle was not diagnosed or repaired. The manufacturer was contacted however, no further assistance was provided. Additionally, the contact stated that while a routine inspection was being performed on the vehicle, she was informed that the frame was corroded, and the vehicle was not drivable. The failure mileage was approximately 134,000.

- Farmington, NH, USA

problem #52

Jun 022021

4Runner

  • miles

A D V E R T I S E M E N T S

When I went to have a tail pipe replaced, it was discovered that the frame of my car was badly rusted. Upon bringing to a mechanic, an auto body shop and a Toyota dealer, they all said the car is not safe to drive. The rest of the body is in mint condition as is the interior and mechanics. I called Toyota Corporation asking for assistance, provided them with the vin and was told they would do nothing and suggested I "junk' the car. Toyota replaced the same frames on their Tacoma models under a recall and it turns out there is no recall for this model. The same frames are used on the 4Runner as well as the Tacoma. Saftcap.com in Cranston RI holds a United States patent for replacing parts of these frames and the owner feels there should have been a recall on the 4Runners just like the Tacomas.

- Acton, MA, USA

problem #51

Jul 032021

4Runner

  • miles
Frame is rusting apart Rear lower trailing arm section has already been patched by previous owner Upper trailing arm connection point to frame crossmember has perished due to rust If the other side breaks the rear axle can flex excessively causing control problems Toyota-??s service campaign for other trucks should not have omitted the 4Runner which shares many identical design characteristics

- Philadelphia , PA, USA

problem #50

Jun 062021

4Runner

  • miles
Corrosion related issues not found on other makes based on personal experience with other boxed ladder frame vehicles Extreme corrosion involving disintegration of the rear trailing arm already haphazardly repaired with steel doubler Ladder frame is disintegrating from interior of frame penetrating towards the exterior facade Compromises structural integrity and safety of vehicle that is seen beyond on many 4runners beside this particular example Brake calipers sticking due to corrosion requiring replacement on multiple occasions Binding of brake components cause severe pull under highway speed braking

- Cherry Hill, NJ, USA

problem #49

May 102021

4Runner

  • miles
My Toyota 4 runner entire frame and connecting components is completely rusted out and crumbling. The car isn't safe to drive at all. Toyota is aware of this as its common and no recall is in place. When driving, one tire is completely barely hanging on as the frame is failing all over. The car wobbles and swerves and feels as if it will come apart at any time. This frame was never treated properly when installed. If you went over 50 the car could fall apart and would be extremely dangerous.

- Dublin, OH, USA

problem #48

Apr 062021

4Runner

  • 208,140 miles
The contact owns a 2006 Toyota 4runner. The contact stated that while changing his brakes independently. The contact noticed that the rear passenger and driver side brake line was severely corroded. The vehicle was not repaired or diagnosed. No dealer was contacted. The manufacturer was not notified of the failure. NHTSA action number: DP18002 (structure) was a possible solution to the failure however the VIN was not included in NHTSA action number. The contact feels unsafe driving the vehicle. The failure mileage was approximately 208,140.

- Virginia Beach, VA, USA

problem #47

Mar 292021

4Runner

  • 84,499 miles
I just had my 2006 Toyota 4runner (85K miles) serviced at A-1 Toyota in new haven ct. My car is immaculate and serviced on a regular basis. As a result of the vehicle inspection, the mechanic identified frame rust issues on both sides of the front frame.

- Shelton, CT, USA

problem #46

Mar 202021

4Runner

  • 147,000 miles
Just bought a 2006 4runner and did not think to check underneath for anything. I noticed on the passenger side of the frame huge rust spots, it's rusting from inside the frame out to the surface. It's bad. I googled what I should do to fix it because now I'm out 7K for what I thought was a reliable SUV. They sell patch kits online requiring me to purchase the kits and have them welded to the frame by a professional after they clean the rust completely. That's expensive. Toyota should definitely take this seriously and not fight this claim. No truck that year should rust this bad. In fact I've bought a 77 Chevy C10 that was a farm truck most it's life and it did not have any frame rust what so ever. There's multiple claims on facebook and other 4runner specific groups online that have this same issue. A recall needs to happen. What if I didn't notice and I let my wife and kids ride in the SUV and the frame snaps in half down the highway? you recalled other models do to frame rust, but not the same year 4runner. Please help us 4runner owners fix this because all in all it's a great SUV Toyota makes some of the best product out there, we just want to keep them on the road.

- Springfield, MO, USA

problem #45

Jan 112021

4Runner

  • 160,000 miles
I have a 2006 4runner with no rust on the body but the frame is full of rust. All body mounts have rusted away from the frame causing a wable when hitting bumps. I am so worried that the car is going to break in half at any time. It causes unusual sounds, creaking, squeaking, unusual noises, bad alignment, uneven wear in the tires, suspension, and shocks.... frame is visibly bent and severely damaged... the worst thing is that I called Toyota for service and they won't fix my frame... my mechanic said that is too far gone to fix.. I'm not able to drive it because it broke off on me..

- Quincy, MA, USA

problem #44

Sep 012020

4Runner

  • 122,000 miles
Frame rust has made 4 runner beyond economical repair. Many parts have been replaced due to rust. Only 124000 miles on vehicle. Rusted brake lines, steering column, transmission lines rusted. Fortunately brake lines leaked while vehicle was M not being driven at this time, parked in driveway.

- Virginia Beach, VA, USA

problem #43

Jul 072020

4Runner

  • miles
The entire frame is rotted and full of holes. Suspension is in danger of detaching spontaneously. The odometer has been rolled back over one hundred thousand.

- Woburn, MA, USA

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