Unclassified problem on the 2000 Toyota 4RUNNER
1 crash 1 of the 37 reports for this failure mention a crash, a fire, an injury or a death. Those are the owner's words on the complaint form, not a verified finding, and one report can mention more than one.
Only 25 reports for this mode came with an odometer reading, which is too few for percentiles to mean anything. The page is here because someone linked to it; treat the figures as anecdotes, and see the full report for this year instead.
When unclassified problem gets reported
Owners of the 2000 Toyota 4RUNNER report unclassified problem at a median of 162,500 miles. A quarter of the reports come in before 130,000 miles and a quarter after 197,500 miles, from 25 reports that carried an odometer reading.
It is the 35th most-reported problem on this model year.
The mileage distribution
The reported range runs from 102,500 miles at the tenth percentile to 260,000 miles at the ninetieth, a spread of 157,400 miles across the middle 80% of reports.
When the reports scatter this far, the mileage is telling you about how these cars were driven more than about the part itself.
8% of the dated reports were filed under 36,000 miles.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| 102,200 miles | 129,000 miles | 162,250 miles | 198,000 miles | 259,600 miles |
Read the 10th percentile as “one report in ten arrived this early”. Exact figures are shown in this table because it is the table of record; everywhere else on the site they are rounded to the precision the sample can carry.
What a percentile can and cannot tell you here
These five numbers describe the readings owners gave, in order. The median is the middle one: half the reports arrived below it. The 10th and 90th are the edges of the bulk of the distribution, and the distance between them is the part worth reading. A tight spread — say 70,000 to 95,000 miles — points at something that wears out on a schedule, and the schedule is knowable. A wide one, 20,000 to 190,000, points at a fault that hits some cars and never troubles others, which means the mileage on the listing in front of you tells you very little about your odds.
What these figures are not is a survival curve. Every reading here comes from a car whose owner filed a complaint, so the sample contains only failures: it cannot say what share of the fleet made it past 150,000 miles untouched, because those owners had nothing to report. Nor is the mileage the moment of failure — it is the odometer reading as recalled at the time of filing, which may be weeks later and is sometimes rounded to the nearest ten thousand by the person typing it.
Percentiles are shown at all only once 8 readings exist for the vehicle and mode. Below that the middle of a handful of numbers is noise wearing a decimal point, so the figures are withheld rather than dressed up.
What happens, and what it costs
Of these reports, 1 a crash is mentioned. Owners write their own complaints and the agency does not verify them, so read this as what the reports say happened rather than as a confirmed count.
The same failure on other years
The same failure is reported on 25 model years of this car. It shows up earliest on the 2022, at a median of 200 miles, and latest on the 1997 at 225,000 miles.
By volume the 2004 carries the most reports, with 87; the 2000 has 37. A mode that appears across most years of a model is usually a design choice rather than a bad batch.
If one year stands out to the left, that is the year to avoid; if the whole line sits at a similar mileage, this is wear rather than a defect in one production run.
Tick median reported mileage Solid middle half of reports Faint 10th to 90th percentile Colour how bad the failure is when it happens
What owners wrote
Verbatim from NHTSA complaint narratives, trimmed for length. The mileage is the one the owner gave.
My toyota 4runner, dated 2000, is running by itself. I need to keep pressing the brakes hard in order to slow the car down. This is happening for the last several years. I believe the electronic system is defective.
Vehicle suddenly became very unstable and loose in the rear end while driving down highway at 50 MPH. Rear end started swaying back and forth pushing vehicle into center of 2 lane highway. Once vehicle was under control and off the road frame showed significant rust. Lower suspension arm mount on frame had rusted and broke. Roughly 24 inch section of this frame area had rusted out. Leaving no attachment of the suspension arm to the frame mount. Upon inspection many areas of frame are showing significant rust damage. Vehicle us now unsafe to drive. I have owned this vehicle for 11-12 years. Bought it with 12,000 mile and have taken great care of it. Engine purrs like a kitten. Runs as well now as when I bought it. Toyota will not warranty a bad design/manufacturing process. Called toyota dealership whom I purchased it from and they said they have been seeing many of these coming in and toyota will not warranty the bad frames. *tr
The frame on my 2000 model toyota 4runner is rusted so bad that it has broken. I contacted toyota asking about a recall. They informed me that there was no recall on this and they have had several complaints on the same subject affecting all 3rd generation toyota 4runners. The receptionist provided me with this website and told me to file a complaint. She also informed me that there would not be any thing done about this situation unless the government issued a recall. It's really upsetting to know that I've only got 138,000 miles on this vehicle and it's not drivable anymore. A replacment frame cost well over $4,000 not including the labor fees.
Also reported on the 2000 Toyota 4RUNNER
Other body or interior problem
Rust or structural corrosion
Control arm, ball joint or bushing failure
Other suspension problem
Differential or transfer case failure
Other steering problem
How far this goes
This page is kept out of search results because 37 reports is not enough to publish percentiles from. It stays reachable because somebody looking at this exact car would rather see the reports than be told there are none.
Complaints are voluntary, so 37 is a floor and not a count of affected cars. Mileages are typed in by owners and cluster on round numbers. And the mode itself is assigned by software reading the complaint text, which is reliable in bulk and fallible one report at a time.
Questions this page answers
At what mileage does unclassified problem happen on the 2000 Toyota 4RUNNER?
Across 25 owner reports that included an odometer reading, half were filed by 162,500 miles. A quarter were filed before 130,000 miles and a quarter after 197,500 miles. These are the mileages owners reported when they complained, not a prediction for any individual car.
How common is unclassified problem on the 2000 Toyota 4RUNNER?
37 reports have been filed with NHTSA, about 214 per 1,000 vehicles. Complaints are voluntary, so this is a floor rather than a count of affected cars.
What this is and is not. These are the mileages at which owners chose to complain to a federal agency, which is not the same as the mileage at which the part fails on every car. It skews toward failures that happened outside warranty, cost real money, or frightened someone. It is still the only public dataset that carries failure mileage at all, and the shape of a few hundred readings is informative even when a single one is not. Methodology · JSON · this failure on other cars
Source Owner complaints and recall records published by the US National Highway Traffic Safety Administration, model years 1996–2027 Figures rebuilt Published by AtWhatMileage How every figure is computed