Other engine problem on the 2011 Hyundai Sonata
14 crashes 53 fires 6 injuries 73 of the 596 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 engine problem gets reported
Owners of the 2011 Hyundai Sonata report other engine problem at a median of 95,000 miles. A quarter of the reports come in before 69,000 miles and a quarter after 126,000 miles, from 424 reports that carried an odometer reading.
A part like this is normally expected to survive 95,000 miles. It is the 2nd most-reported problem on this model year.
The mileage distribution
The reported range runs from 36,000 miles at the tenth percentile to 158,000 miles at the ninetieth, a spread of 121,450 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.
10% of the dated reports were filed under 36,000 miles.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| 36,300 miles | 68,750 miles | 94,500 miles | 126,000 miles | 157,750 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, 14 a crash, 53 a fire and 6 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–$4,000 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.
The same failure on other years
The same failure is reported on 26 model years of this car. It shows up earliest on the 2023, at a median of 100 miles, and latest on the 2008 at 115,000 miles.
By volume the 2011 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.
I drove to the local tom thumb store and was pulling into a parking space. My foot was on the brake and the car was almost to a complete stop when it suddenly lurched forward and the engine spontaneously went to full throttle. I mashed down on the brake peddle as the car jumped the curbed and crashed through the store front. The engine continued to race until I switched off the key. Skid marks were evident on the pavement where the brakes tried to hold the car with the engine racing. The florida highway patrol investigator did not issue a citation stating that there "was an obvious vehicle malfunction".
Since the day I purchased 2011 sonata...I had/have burning smell coming from engine compartment (air open to outside). Told the dealer about it and pointed to them that the drive belt has unusual wear. They check it and compared with other sonatas with same mileage and found no unusual wear. I am ex toyota tech. With ase certs. I have now 20k on my sonata and they still did not correct the problem. *tr
I have a 2011 hyundai sonata. I purchased the car in august of 2010. About a month after owning the vehicle, the engine light came on. When I took it to the dealer, they recorded the code and then said it was the AC. I was asked to wait 15 seconds before turning the AC on after starting car. So I did that. About a week or so later, the light comes on again. Take it back twice after this, they record the code and then the switch is replaced. I maintain my car with all maintenance requested and I drive it on the highway. I had the tire light come on a few months later - was told it was the temperature. That eventually went off. Next was the engine light yet again. This time it occurred after I took the car in on june 17th for an oil change. They told me a recall was on the transmission and they did the recall update. Immediately after this update, the car drove terribly. Very loud, very rough. About a week after this update, the car breaks down in the parking lot. It has done this now about 5 or 6 times since june (today is july 20th). I take it to the dealer and told I need the engine light on in order to repair. The light needs to…
Also reported on the 2011 Hyundai Sonata
Other steering problem
Steering column or shaft failure
Airbag warning light or occupant sensor fault
Other electrical problem
Tail light, brake light or signal failure
No-start or intermittent start failure
How far this goes
Complaints are voluntary, so 596 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 engine problem happen on the 2011 Hyundai Sonata?
Across 424 owner reports that included an odometer reading, half were filed by 95,000 miles. A quarter were filed before 69,000 miles and a quarter after 126,000 miles. These are the mileages owners reported when they complained, not a prediction for any individual car.
How common is other engine problem on the 2011 Hyundai Sonata?
596 reports have been filed with NHTSA, about 2.5 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