Rust or structural corrosion on the 2007 Hyundai Sonata
3 crashes 3 fires 6 of the 10 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 rust or structural corrosion gets reported
Owners of the 2007 Hyundai Sonata report rust or structural corrosion at a median of 80,000 miles. A quarter of the reports come in before 70,000 miles and a quarter after 120,000 miles, from 10 reports that carried an odometer reading.
A part like this is normally expected to survive 120,000 miles. It is the 17th most-reported problem on this model year.
The mileage distribution
The reported range runs from 55,000 miles at the tenth percentile to 125,000 miles at the ninetieth, a spread of 68,500 miles across the middle 80% of reports.
A spread this wide points at use rather than design. Towing, climate, service history and city mileage all move a failure like this, so the median is a weak guide to any individual car.
0% of the dated reports were filed under 36,000 miles.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| 56,200 miles | 70,675 miles | 82,000 miles | 120,000 miles | 124,700 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 crash and 3 a fire 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 $500–$6,000 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 11 model years of this car. It shows up earliest on the 2013, at a median of 70,000 miles, and latest on the 2004 at 130,000 miles.
By volume the 2002 carries the most reports, with 39; the 2007 has 10. 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 had taken my 2007 hyundai sonata to towne hyundai in denville, nj. The xm radio mysteriously stopped working one day. Xm corporation had done troubleshooting with the car and determined that the signal was reaching the car and advised me to bring it to hyundai. Hyundai noted that the top box for the xm radio which is located in a gulley in the trunk behind the rear passenger wheel had rusted and that there was water in my trunk. I was provided with a copy of a technical service bulletin that hyundai had written noting that "water may enter the trunk through body seams, welds, body plugs" and that any suspect water entry point would need to be sealed to correct further damage from occurring. The xm top box is completely non-functional due to the water damage/excessive rust. Hyundai corporation has thus far refused to cover the defective body seals which is causing further rusting of the body of this vehicle as well as safety concerns if this vehicle were ever in an accident. Hyundai has also refused to cover any replacement costs relating to the xm radio top box. Hyundai has not been proactive in notifying customers of this…
I had taken my 2007 hyundai sonata to towne hyundai in denville, nj. The xm radio mysteriously stopped working one day. Xm corporation had done troubleshooting with the car and determined that the signal was reaching the car and advised me to bring it to hyundai. Hyundai noted that the top box for the xm radio which is located in a gulley in the trunk behind the rear passenger wheel had rusted and that there was water in my trunk. I was provided with a copy of a technical service bulletin that hyundai had written noting that "water may enter the trunk through body seams, welds, body plugs" and that any suspect water entry point would need to be sealed to correct further damage from occurring. The xm top box is completely non-functional due to the water damage/excessive rust. Hyundai corporation has thus far refused to cover the defective body seals which is causing further rusting of the body of this vehicle as well as safety concerns if this vehicle were ever in an accident. Hyundai has also refused to cover any replacement costs relating to the xm radio top box. Hyundai has not been proactive in notifying customers of this…
I had taken my 2007 hyundai sonata to towne hyundai in denville, nj. The xm radio mysteriously stopped working one day. Xm corporation had done troubleshooting with the car and determined that the signal was reaching the car and advised me to bring it to hyundai. Hyundai noted that the top box for the xm radio which is located in a gulley in the trunk behind the rear passenger wheel had rusted and that there was water in my trunk. I was provided with a copy of a technical service bulletin that hyundai had written noting that "water may enter the trunk through body seams, welds, body plugs" and that any suspect water entry point would need to be sealed to correct further damage from occurring. The xm top box is completely non-functional due to the water damage/excessive rust. Hyundai corporation has thus far refused to cover the defective body seals which is causing further rusting of the body of this vehicle as well as safety concerns if this vehicle were ever in an accident. Hyundai has also refused to cover any replacement costs relating to the xm radio top box. Hyundai has not been proactive in notifying customers of this…
Also reported on the 2007 Hyundai Sonata
Airbag warning light or occupant sensor fault
Other visibility problem
Other brake problem
Seat belt or retractor failure
Other driver assistance problem
Other body or interior problem
How far this goes
Complaints are voluntary, so 10 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 rust or structural corrosion happen on the 2007 Hyundai Sonata?
Across 10 owner reports that included an odometer reading, half were filed by 80,000 miles. A quarter were filed before 70,000 miles and a quarter after 120,000 miles. These are the mileages owners reported when they complained, not a prediction for any individual car.
How common is rust or structural corrosion on the 2007 Hyundai Sonata?
10 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