Other engine problem on the 2008 Hyundai Sonata
3 fires 3 of the 26 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 2008 Hyundai Sonata report other engine problem at a median of 115,000 miles. A quarter of the reports come in before 92,500 miles and a quarter after 130,000 miles, from 25 reports that carried an odometer reading.
A part like this is normally expected to survive 95,000 miles. It is the 4th most-reported problem on this model year.
The mileage distribution
The reported range runs from 32,500 miles at the tenth percentile to 165,000 miles at the ninetieth, a spread of 132,000 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.
16% of the dated reports were filed under 36,000 miles.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| 32,000 miles | 93,000 miles | 115,000 miles | 130,000 miles | 164,000 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, 3 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 $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 carries the most reports, with 596; the 2008 has 26. 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.
Tl* the contact owns a 2008 hyundai sonata. The contact stated that while driving approximately 60 MPH, a loud ticking noise emitted from the engine. The vehicle then began to decelerate. The contact stopped the vehicle on the shoulder of the road and shut the vehicle off. The contact attempted to restart the vehicle, but it would not restart. The vehicle was towed to an independent mechanic. The mechanic stated that the engine fractured and would have to be replaced. The vehicle was not repaired. The approximate failure mileage was 90,000. The VIN was not available. Updated 02/14/12*lj updated 02/24/12
Driving on I-94 in battle creek, mi, the 2008 sonata, after making a ticking noise for a year (which the dealership would not look at) began to make a grinding noise and something flew out of the engine and smoke came pouring out of the vents. I pulled to the shoulder on this busy interstate and called roadside assistance from hyundai. They sent a wrecker, and when the car was lifted, all of the oil was on the road. They towed it to the nearest dealer 30 miles away in kalamazoo, mi and they told me that a rod and piston had flown out of the bottom of the engine of the car. After doing some research, there seems to be a problem with faulty crank rod cap bolts. The ticking I think was from the rod cap that had come off. As of now, they are not doing anything under warranty awaiting oil change receipts. Please force a recall soon, as this could be an extremely dangerous situation. Someone could have been killed by the flying piston. Luckily it flew off to the side of the road. *tr
I was driving my car and, according to my mechanic, the crank rod came loose. I bought this vehicle used so the hyundai 100,000 mile warranty will not cover it. I have done routine oil changes and up to this point had no real problem with the vehicle. It is disappointing to say the least as I have had this vehicle for about four years and purchased it based on the idea that hyundai's are supposed to be reliable vehicles. I had hoped that hyundai would have done something to help remedy the situation but at this point they have not, which is also disappointing. In the future I will not be purchasing a hyundai. *tr
Also reported on the 2008 Hyundai Sonata
Other visibility problem
Airbag warning light or occupant sensor fault
Other brake problem
Oil leak
Other driver assistance problem
Seat belt or retractor failure
How far this goes
Complaints are voluntary, so 26 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 2008 Hyundai Sonata?
Across 25 owner reports that included an odometer reading, half were filed by 115,000 miles. A quarter were filed before 92,500 miles and a quarter after 130,000 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 2008 Hyundai Sonata?
26 reports have been filed with NHTSA, about 0.2 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