Unclassified problem on the 2018 Toyota Tundra
1 injury 1 of the 15 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 8 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 Tundra report unclassified problem at a median of 2,100 miles. A quarter of the reports come in before 500 miles and a quarter after 5,000 miles, from 8 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 200 miles at the tenth percentile to 15,000 miles at the ninetieth, a spread of 16,879 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.
100% of the dated reports were filed under 36,000 miles.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| 240 miles | 488 miles | 2,100 miles | 5,525 miles | 17,119 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 an injury 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 22 model years of this car. It shows up earliest on the 2018, at a median of 2,100 miles, and latest on the 2001 at 165,000 miles.
By volume the 2006 carries the most reports, with 118; the 2018 has 15. 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.
The intrinsic trailer brake controller did not work properly. The gain could not be set initially. The dealership computer system could not detect the problem. The only way the problem was recognized was by attaching a trailer or a trailer simulator to the truck. The dealership noted that all the 2018 tundra trucks on their lot had the same problem. This is a serious problem that could lead to accidents if the driver is not aware that the trailer braking system is not working. We were persistent and the dealership did replace the controller with one that did work. However, this controller could not be ordered from toyota, but only from the supplier that makes them for toyota. After our truck was affected, we found many reports of the same problem on this truck. This problem was detected immediately after we purchased the truck by the technician who installed the gooseneck hitch.
Pre collision sensor light comes on at various times dash reads "pre collision unavailable" car has 500 miles on it and is a week old, I have taken car to the dealer and was told it should only happen if the vehicle was in an accident, it was not in an accident, the sensor comes on and off at various times, speeds.
The pcs always come on the truck died when I was driving it also whent into limp mode on the highway couldn't drive over 20 MPH the truck slammed on the breake when I was driving it into a tunnel in seattle wa almost caused a big accident if there was a semi truck some one would have died the selling dealer lied to me on what's going on with my rig keeps telling me non of the problems that's happened isn't a safety problem they also look at stuff that's not what I bring the truck into for the problems they are just giving me the run around every time the have my truck it seems they don't care about what I'm telling them what's going on with the truck they look at stuff my truck don't have or something easy different this truck is a lemon it has safety problems I have attempted to contact the owner of toyota dealership that sold me the truck 4 difrent time and they never called me back there service manager and advisers lie to me there mechanic says one thing but management tells me something elsa the truck is a big safety issue this happens on highways and freeways at higher rates speeds I also have video of some of the safety…
Also reported on the 2018 Toyota Tundra
Cruise control failure
Other brake problem
Other electrical problem
Other driver assistance problem
Fuel pump failure
Other engine problem
How far this goes
This page is kept out of search results because 15 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 15 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 Tundra?
Across 8 owner reports that included an odometer reading, half were filed by 2,100 miles. A quarter were filed before 500 miles and a quarter after 5,000 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 Tundra?
15 reports have been filed with NHTSA, about 0.2 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