Thermostat failure on the 2015 Dodge Dart
Only 6 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 thermostat failure gets reported
There are 6 reports of thermostat failure on the 2015 Dodge Dart, 6 with a mileage attached. That is too few to place the failure on the odometer with any confidence.
A part like this is normally expected to survive 95,000 miles. It is the 30th most-reported problem on this model year.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| — | — | 50,000 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
Putting it right typically runs $250–$900 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 3 model years of this car. It shows up earliest on the 2016, at a median of 40,000 miles, and latest on the 2014 at 115,000 miles.
By volume the 2015 is the worst of them, which makes this a problem of this specific year rather than of the model as a whole.
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.
Tl* the contact owns a 2015 dodge dart. While operating the vehicle, the check engine indicator suddenly illuminated and the instrument panel electronics and gauges suddenly turned off. The vehicle was towed to friendly dodge (1395 newlands dr, friendly, nv) where it was diagnosed that the thermostat was faulty and needed to be replaced. The thermostat was replaced and the failure was remedied. The manufacturer was notified of the failure, but no assistance was offered. The failure mileage was 80,000.
Check engine light came on and went and had it read. Said it was low on coolant, put coolant in after car was not hot and light continued to stay on and all read up the same, low coolant, but it wasn't. Apparently it was the thermostat. Why is there not a recall on these faulty things? I have seen more people reporting problems for these and there is still no recall!!! I will never own anything chrysler made again, they never stand behind their mistakes, but expect the owners of the vehicles to pay a ridiculous amount of money to have the vehicle fixed.
I have a 2015 dodge dart se and its been nothing but issues! In 2016 I was on the highway going 65mph and all sudden my [xxx] car shut off completely! I had to immediately turn it back on and shift into 4th gear because my car started slowing down while and I had to pull over! Im so sick of this model and after reading about others having the same issues its just ridiculous and dangerous! I got it checked and they said everything looked okay and they didn't find any issues. So cars just turn off by themselves while driving for no reason?! Fast forward to 2017, the engine light comes on for the first time and I take it to a dodge dealership in killeen tx and I find out it was the thermostat and they told me there was nothing wrong and that I could drive to alaska and back with no issues. So I leave and a day later the engine light is gone like it was never there. And here it is 2018 and the [xxx] engine light is back on again. I take it to firestone on base and guess what the [xxx] they tell me?! You guessed right! The [xxx] thermostat. At this point I'm just pissed and frustrated and they tell me I'm looking at a $500 fix and that…
Also reported on the 2015 Dodge Dart
Other powertrain problem
Other engine problem
Excessive oil consumption
Other electrical problem
Other brake problem
Master cylinder or brake booster failure
How far this goes
This page is kept out of search results because 6 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 6 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 thermostat failure happen on the 2015 Dodge Dart?
Across 6 owner reports that included an odometer reading, half were filed by 50,000 miles. A quarter were filed before — and a quarter after —. These are the mileages owners reported when they complained, not a prediction for any individual car.
How common is thermostat failure on the 2015 Dodge Dart?
6 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