Problems · NHTSA complaints

2006 Toyota 4Runner problems

Owners filed 381 complaints about the 2006 Toyota 4Runner with NHTSA between Jan 2006 and Sep 2026. The most-cited component is structure (143).

Complaints
381
Filed with NHTSA
Crashes
28
Reported by owners
Fires
3
Reported by owners
Injuries
18
People reported injured
Deaths
0
Reported to NHTSA
01 —By component

Complaints by component

One complaint can cite several components
  1. Structure143
  2. Suspension65
  3. Power train30
  4. Air bags24
  5. Steering22
  6. Service brakes19
  7. Electrical system18
  8. Vehicle speed control17
  9. Service brakes, hydraulic14
  10. Visibility/wiper13
  11. Tires13
  12. Engine and engine cooling11
  13. Visibility9
  14. Engine7

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.

Data from NHTSA Complaints API · synced Oct 27, 2026NHTSA vehicle page
02 —Trend

When complaints were filed

Does it get worse with age? Complaints per calendar year filed
View as table
Model yearComplaints filed per calendar year
200617
200713
20087
20099
201033
201112
201210
20137
201416
201510
201617
201721
201844
201957
202036
202138
202215
20237
20244
20255
20263

Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.

03 —Owner reports

Top problems in owners’ words

Verbatim from NHTSA complaints, newest first

Structure

143 reports2 crashes
“Frame is rotting away. The tacomas, tundras, sequoia were recalled for this issue. The tacomas frame is very close in design to the 4runner. The main difference is the 4runner uses coil springs whereas the tacoma used leaf springs. Toyota stated that because the 4runner was made in Japan unlike the others that were made in the USA, that the 4runners were not part of the recall.most of the 4runners that are no longer drivable, are because of rotted frames. The repair kits that fix the rotted frames on the tacomas are the same kits that fix the 4runners. Now toyota won't even touch my vehicle for other repairs because of the rot holes.”
Owner complaint to NHTSAFiled Apr 22, 2026StructureODI 11732907

Suspension

65 reports3 crashes
“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.”
Owner complaint to NHTSAFiled Jun 27, 2023Suspension, StructureODI 11529092

Power train

30 reports4 crashes
“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.”
Owner complaint to NHTSAFiled May 15, 2021Steering, Suspension, Power trainODI 11416732

Air bags

24 reports8 crashes1 related recall
“The contact owned a 2006 Toyota 4Runner. The contact stated that her son was driving at an unknown speed when another vehicle pulled in front of them to change lanes without warning causing her son to t-bone the vehicle and sending the other driver's vehicle to spin crashing into other vehicles nearby. The air bags deployed however their son received 2nd-degree burns on their right and 1st-degree burns on their lower region, and a concussion. The contact was unable to confirm if any other persons received injuries but was able to confirm other vehicles were damaged from the crash. Medical attention was needed. A police report was filed. The vehicle was towed to their insurance company's facilities who had stated the vehicle was totaled. The dealer was not contacted. The manufacturer was not made aware of the failure. The failure mileage was unknown. The VIN was not available.”
Owner complaint to NHTSAFiled Nov 8, 2024Air bagsCrash reportedODI 11624146

Steering

22 reports2 crashes
“My 4runner was purchased from a dealership and serviced there for rust related problems several times but was never told I had a serious rust problem. The problem is the frame has prematurely rusted and now the car is unsafe to drive due to the control arm rusting off the frame”
Owner complaint to NHTSAFiled Jun 28, 2022Steering, StructureODI 11471394

Service brakes

19 reports1 crash
“Corrosion of pistons in front brake calipers results in an increase in braking stopping distance. Everytime the front brake pads are replaced the same issue is encountered, defect has taken place three times. In the four piston brake caliper the inside pistons on both the left and right caliper are frozen in place . The brake pads on the outside position have twice as much wear as the inside pads. This is an indication of uneven braking leading to increased stopping distance . Toyota maintains , there is not a problem, yet in forums on the web there are many experiences with owners having the same problem , resulting in costly repair bills. There is no warning of reduced braking efficiency .”
Owner complaint to NHTSAFiled Mar 12, 2023Service brakesODI 11511454
Data from NHTSA Complaints API (owner reports, unverified) · synced Oct 27, 2026

Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.