Overheating on the 2013 Hyundai Sonata
1 fire 1 of the 20 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 overheating gets reported
Owners of the 2013 Hyundai Sonata report overheating at a median of 80,000 miles. A quarter of the reports come in before 60,000 miles and a quarter after 80,000 miles, from 11 reports that carried an odometer reading.
A part like this is normally expected to survive 102,000 miles. It is the 27th most-reported problem on this model year.
The mileage distribution
The reported range runs from 50,000 miles at the tenth percentile to 100,000 miles at the ninetieth, a spread of 50,000 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.
0% of the dated reports were filed under 36,000 miles.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| 50,000 miles | 60,000 miles | 79,412 miles | 80,000 miles | 100,000 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, 1 a fire 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.
Putting it right typically runs $400–$3,500 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 8 model years of this car. It shows up earliest on the 2015, at a median of 1,100 miles, and latest on the 2011 at 90,000 miles.
By volume the 2012 carries the most reports, with 21; the 2013 has 20. 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.
Both tail light assemblies partially melted from the brake light bulb overheating. The brake light bulb itself was melted and fused into the socket housing it. The socket was blackened from overheating. It was the same problem on the left and right tail light assembly. I replaced both tail light assemblies since the plastic was partially melted and became deformed. The issue was likely an ongoing problem while the car was parked and in motion. There may be an electrical wiring problem as the underlying cause.
Both brake taillights bulbs keeps burning out this is an ongoing issue, it happened four times for me this year 8/1/2018, and three times last year 2017. Every time it happens I change the bulbs with the manufacture standard ones but fails again and again, I have done some google research and find forums of complaints regarding this brake light problem. Its becoming a safety issue because the tail lights sockets are overheating causing the buld to melt and stick into the tail lights socket, I notice the same problem when I change my bulb earlier this year. There's a lot of hyundai owners complaining about this issue it needs to be fix before someone's car catch on fire.
Both brake taillights bulbs keeps burning out this is an ongoing issue, it happened four times for me this year 8/1/2018, and three times last year 2017. Every time it happens I change the bulbs with the manufacture standard ones but fails again and again, I have done some google research and find forums of complaints regarding this brake light problem. Its becoming a safety issue because the tail lights sockets are overheating causing the buld to melt and stick into the tail lights socket, I notice the same problem when I change my bulb earlier this year. There's a lot of hyundai owners complaining about this issue it needs to be fix before someone's car catch on fire.
Also reported on the 2013 Hyundai Sonata
Other engine problem
Other steering problem
Other electrical problem
Other fuel system problem
Tail light, brake light or signal failure
Other lighting problem
How far this goes
Complaints are voluntary, so 20 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 overheating happen on the 2013 Hyundai Sonata?
Across 11 owner reports that included an odometer reading, half were filed by 80,000 miles. A quarter were filed before 60,000 miles and a quarter after 80,000 miles. These are the mileages owners reported when they complained, not a prediction for any individual car.
How common is overheating on the 2013 Hyundai Sonata?
20 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