Unclassified problem on the 2018 Toyota 4RUNNER
6 crashes 2 injuries 8 of the 14 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 11 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 2018 Toyota 4RUNNER report unclassified problem at a median of 10,000 miles. A quarter of the reports come in before 10,000 miles and a quarter after 20,000 miles, from 11 reports that carried an odometer reading.
It is the 29th most-reported problem on this model year.
The mileage distribution
The reported range runs from 1,400 miles at the tenth percentile to 30,000 miles at the ninetieth, a spread of 27,600 miles across the middle 80% of reports.
A window that narrow is the signature of a part that fails on its own schedule rather than on how the car is driven — which is usually a design or supplier problem rather than wear and tear.
91% of the dated reports were filed under 36,000 miles.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| 1,400 miles | 8,800 miles | 9,600 miles | 20,500 miles | 29,000 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, 6 a crash and 2 an injury are 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 2018 has 14. 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.
Toyota "all weather floor liners" are collapsing at the sides and becoming a tripping hazard. Toyota part number pt908-89160-02. Within week of buying new car, the floor liner on passenger side was collapsing on the sides. Reported to dealer. He checked with toyota rep and was told it was not under warranty. We contacted the sales manager at dealership, he bought use new mats. Within six days of new mats, the same problem began again, see picture. Since toyota has a history of floor mat issues, one would think this would be a be concern to them, apparently not.
Vehicle has constant transmitted engine vibration in steering wheel. Vibrations are causing tingling, numbness and joint pain. Vibrations are worse with increased engine RPM. Vibrations have been constant since car was purchased new in april, 2018. Car has 2400 miles on it currently, 5/23/18. Long trip (900 miles) was first time there was tingling and numbness which were unbearable at the 450 mile mark and the return trip was quite distracting and uncomfortable to say the least. For 2 weeks afterwards, tingling and numbness remained. Now after approx. 3 weeks, it takes about 10 minutes of driving for the tingling and numbness to return now feeling mild joint pain as well. Vehicle has been brought in for repair 3 times so far for this condition and the dealer and toyota refuse to acknowledge the condition! I have already scheduled the 4th. Appointment at the dealer so I can commence my arbitration/lemon law claim. I purchased a vibration analyzer and the readings off the steering wheel far exceed safe recommended vibration levels established by n.I.o.s.h,/o.s.h.a. By a factor of at least 3 to 4 times! If I keep driving this vehicle…
Also reported on the 2018 Toyota 4RUNNER
Other steering problem
Fuel pump failure
Other brake problem
Parking brake failure
Other fuel system problem
Other wheel or tire problem
How far this goes
This page is kept out of search results because 14 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 14 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 2018 Toyota 4RUNNER?
Across 11 owner reports that included an odometer reading, half were filed by 10,000 miles. A quarter were filed before 10,000 miles and a quarter after 20,000 miles. These are the mileages owners reported when they complained, not a prediction for any individual car.
How common is unclassified problem on the 2018 Toyota 4RUNNER?
14 reports have been filed with NHTSA, about 0.6 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