Other brake problem on the 2011 Toyota Prius
11 crashes 2 injuries 13 of the 136 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 brake problem gets reported
Owners of the 2011 Toyota Prius report other brake problem at a median of 62,500 miles. A quarter of the reports come in before 22,500 miles and a quarter after 115,000 miles, from 92 reports that carried an odometer reading.
A part like this is normally expected to survive 88,000 miles. It is the 1st most-reported problem on this model year.
The mileage distribution
The reported range runs from 1,100 miles at the tenth percentile to 160,000 miles at the ninetieth, a spread of 157,950 miles across the middle 80% of reports.
A spread this wide points at use rather than design. Towing, climate, service history and city mileage all move a failure like this, so the median is a weak guide to any individual car.
34% of the dated reports were filed under 36,000 miles.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| 1,050 miles | 22,476 miles | 62,500 miles | 116,096 miles | 159,000 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, 11 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.
Putting it right typically runs $300–$1,800 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.
The same failure on other years
The same failure is reported on 19 model years of this car. It shows up earliest on the 2010, at a median of 4,000 miles, and latest on the 2001 at 120,000 miles.
By volume the 2010 carries the most reports, with 1,267; the 2011 has 136. 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.
I have a 2011 prius and if while I am braking, I drive over a bump in the road, the brakes release. I must re-apply the brakes to re-engage them. I feel this is very dangerous. There are numerous website references to this problem. When will a recall happen before someone has a serious accident? *tr
Noticed brakes breaking intermittently about a week after purchase. Dismissed it because of weather and it was a new car, thought it was just different feel from my last vehicle. I don't drive often averaging 10,000 miles or less per year, so when I noticed this problem repeating, and actually near causing an accident I got concerned. Took it to the dealership today, they found nothing wrong, and on the way home experienced the same problem. The inability to stop completely presents a hazard, especially when this occurs under normal braking conditions. If the dealer can't find the problem what recourses do consumers have? *tr
When I push on the brakes and I happen to go over a bump or a pot hole, my prius speeds up. It accelerates when I try to decelerate. I have to push harder on the brakes to really slow the car down. This problem happens when I'm driving at around 40mile/hr. I have a 2011 type iii prius. I took my car to the toyota dealer and they claimed that they could not reproduce the problem. This is total bs because as soon as I got it back from them I could reproduce the problem on my way back home. Please advise me of what to do. [xxx] information redacted pursuant to the freedom of information act (foia), 5 u.s.c. 552(b)(6). *tr
Also reported on the 2011 Toyota Prius
Master cylinder or brake booster failure
Other electrical problem
Headlight failure or clouding
Other engine problem
Other speed control problem
Loss of braking
How far this goes
Complaints are voluntary, so 136 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 brake problem happen on the 2011 Toyota Prius?
Across 92 owner reports that included an odometer reading, half were filed by 62,500 miles. A quarter were filed before 22,500 miles and a quarter after 115,000 miles. These are the mileages owners reported when they complained, not a prediction for any individual car.
How common is other brake problem on the 2011 Toyota Prius?
136 reports have been filed with NHTSA, about 1.0 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