Other brake problem on the 2015 Hyundai Sonata
7 crashes 3 fires 3 injuries 13 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.
When other brake problem gets reported
Owners of the 2015 Hyundai Sonata report other brake problem at a median of 40,000 miles. A quarter of the reports come in before 20,000 miles and a quarter after 55,000 miles, from 21 reports that carried an odometer reading.
A part like this is normally expected to survive 88,000 miles. It is the 11th most-reported problem on this model year.
The mileage distribution
The reported range runs from 15,000 miles at the tenth percentile to 70,000 miles at the ninetieth, a spread of 55,000 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.
38% of the dated reports were filed under 36,000 miles.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| 15,000 miles | 21,616 miles | 39,000 miles | 55,600 miles | 70,000 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, 7 a crash, 3 a fire and 3 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 21 model years of this car. It shows up earliest on the 2018, at a median of 10,000 miles, and latest on the 2020 at 120,000 miles.
By volume the 2012 carries the most reports, with 87; the 2015 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.
I purchased my hyundai sonata on 1/05/2015 with only 6 miles from sheehy hyundai of waldor in maryland after 11 days of purchase on january 16 2015 at approximately 5:45 pm (rush hour in the dc metro area) my sonata came to an abrupt stop without any warning signs on the highway in middle lane which is very dangerous and very scary and put me in a very vulnerable position. The engine shut off, I was unable to steer out the way of traffic and the brakes locked up and I was unable to do anything while in the middle of the rush hour traffic. I was a sitting duck waiting to get smashed by a pickup truck directly in the back of me.thank my god nothing happened. I was unable to use the sos and bluelink emergency features that is equipped came with 3 months free activation in this vehicle. I had to personally call via my cell phone and await police assistance which was 10 minutes still in the middle of the highway and after the assistance of the police we were only then able to push the vehicle to the shoulder of the highway. The bluelink customer service did very poorly in responding after all this emergency situation and to make it…
Tl* the contact owns a 2015 hyundai sonata. While driving at various speeds and attempting to engage the brakes, the vehicle failed to stop. Also, the vehicle experienced various electrical failures. The contact stated that the failures recurred multiples times. The vehicle was taken to a dealer, but was not diagnosed or repaired. The manufacturer was notified of the failures. The failure mileage was 4,500.
Tl* the contact owns a 2015 hyundai sonata. The contact stated that when the brake pedal was depressed, the vehicle accelerated. In addition, the vehicle would not move when the accelerator pedal was depressed. The vehicle was not repaired. The manufacturer was not made aware of the issue. The failure mileage was 25,000.
Also reported on the 2015 Hyundai Sonata
Other engine problem
Other electrical problem
Excessive oil consumption
Other powertrain problem
Other body or interior problem
Other steering problem
How far this goes
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 other brake problem happen on the 2015 Hyundai Sonata?
Across 21 owner reports that included an odometer reading, half were filed by 40,000 miles. A quarter were filed before 20,000 miles and a quarter after 55,000 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 2015 Hyundai Sonata?
37 reports have been filed with NHTSA, about 0.3 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