Other speed control problem on the 2014 Toyota Prius
7 crashes 4 injuries 11 of the 10 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.
When other speed control problem gets reported
Owners of the 2014 Toyota Prius report other speed control problem at a median of 20,000 miles. A quarter of the reports come in before 5,000 miles and a quarter after 60,000 miles, from 10 reports that carried an odometer reading.
A part like this is normally expected to survive 78,000 miles. It is the 7th most-reported problem on this model year.
The mileage distribution
The reported range runs from 2,400 miles at the tenth percentile to 70,000 miles at the ninetieth, a spread of 67,665 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.
60% of the dated reports were filed under 36,000 miles.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| 2,435 miles | 3,000 miles | 19,344 miles | 58,350 miles | 70,100 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, 7 a crash and 4 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.
Putting it right typically runs $250–$2,000 at an independent US shop. That range is an editorial estimate held in this site's failure-mode catalogue, not a figure from NHTSA, and it is a repair cost rather than a diagnosis cost.
This mode is classified as critical, which means a failure can leave the car unable to stop, steer, or stay out of the way of traffic. It is weighted accordingly in the risk score.
The same failure on other years
The same failure is reported on 19 model years of this car. It shows up earliest on the 2019, at a median of 1,500 miles, and latest on the 2001 at 60,000 miles.
By volume the 2010 carries the most reports, with 221; the 2014 has 10. 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.
While traveling in slippery conditions I attempted to navigate a right hand turn. The car began to slide while braking indicating possible snow buildup in front of tires. I attempted to accelerate out of the slide which is proper in front wheel drive vehicles. The cars dash lights lite up and the slide indicator started beeping. The car became completely unresponsive to the gas providing no power whatsoever. The car slid over the curb and crashed into a highway sign and finally came to rest. *tr
I was pulling into a convenience store in my 2014 prius. As I was gliding in, I depressed the brake pedal and the car kept going. I continued to press it and the car started to accelerate, I could feel the surge of power. I was completely unable to stop the car and ran into parking posts at the front of the store. All airbags were deployed. I got a cut on my forehead, an ambulance came but I declined and my husband drove me to the er later where I received treatment. I was coming home from the gym at 9 am I have never been at fault in an accident before. I have a witness that said he heard a chirping sound coming from the brakes before I crashed. Toyota completely denies there is anything wrong with the car, but gives no explanation as to how this could have occurred. They will not help at all. Someone is going to get seriously injured or killed. This needs to be investigated by someone other than toyota. *tr
I was pulling into a convenience store in my 2014 prius. As I was gliding in, I depressed the brake pedal and the car kept going. I continued to press the brake and the car started to accelerate. I could feel the surge of power. I was completely unable to stop the car and I ran into parking posts at the front of the store. All airbags were deployed. I got a cut on my forehead and was bleeding. An ambulance arrived and my husband drove me to the er afterwards and I received treatment. I was coming home from the gym at 9am in the morning. I have never been at fault in an auto accident before. I have a witness that said he heard a chirping sound coming from my brakes right before the crash. I have the pin drive from the car that a representative, supposedly from an outside source, that retrieved it. This is what toyota used to conduct their "investigation" into the incident. They concluded that it was completely not their fault, not indicating how it could have happened. They are not going to help at all. Someone other than toyota needs to investigate this problem before someone else gets killed. ( I filed a previous complaint this…
Also reported on the 2014 Toyota Prius
Other brake problem
Other electrical problem
Master cylinder or brake booster failure
Loss of braking
Other visibility problem
Other engine problem
How far this goes
Complaints are voluntary, so 10 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 other speed control problem happen on the 2014 Toyota Prius?
Across 10 owner reports that included an odometer reading, half were filed by 20,000 miles. A quarter were filed before 5,000 miles and a quarter after 60,000 miles. These are the mileages owners reported when they complained, not a prediction for any individual car.
How common is other speed control problem on the 2014 Toyota Prius?
10 reports have been filed with NHTSA, about 0.1 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