Other speed control problem on the 2004 Hyundai Elantra
Only 5 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 other speed control problem gets reported
There are 5 reports of other speed control problem on the 2004 Hyundai Elantra, 5 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 78,000 miles. It is the 8th most-reported problem on this model year.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| — | — | 85,500 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–$2,000 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.
This mode is classified as critical, which means a failure can leave the car unable to stop, steer, or stay out of the way of traffic. It is weighted accordingly in the risk score.
The same failure on other years
The same failure is reported on 23 model years of this car. It shows up earliest on the 2020, at a median of 5,000 miles, and latest on the 2009 at 85,000 miles.
By volume the 2013 carries the most reports, with 31; the 2004 has 5. 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.
Dt: 2004 hyundai elantra, vehicle accelerated without the gas pedal being touched, consumer first tried the brakes which did not stop the vehicle from accelerating. The consumer had to ride the brakes until she could get the vehicle off the freeway, she put the vehicle in a variety of positions, for example drive, park, and neutral the engine still raced, consumer even turned vehicle off and back on and the vehicle would not stop racing, consumer applied both feet to the brake and turned vehicle off two or three times before the vehicle finally stopped, the vehicle had to be towed home, the dealer fixed the vehicle the first time, and replaced the throttle sensor, this occurred on nov. 18, 2004; this same problem occurred again on june 2, 2005, the dealer states that by replacing the engine check modular that it should fix the problem, and the dealer replaced the engine check modular, consumer is concerned about the safety of the vehicle, the vehicle smelled of a burning smell after the second time . *jb updated 12/27/2005. *nm
My vehicle revs on it's own. Starting and stopping through town is very dangerous because it is difficult to stop the vehicle. As I hold the brake down the car continues to accelerate as if my foot is on the accelerator. The car revs in park, neutral, drive, and reverse. I took it to a local mechanic. He cleaned out the fuel throttle and the problem went away for about 1 week and came back. I talked to another mechanic and he had never heard anything like it. He told me it was probably a defect. *tr
Tl*the contact owns a 2004 hyundai elantra. While the vehicle was slowly reversing with her foot on the brake pedal, the rpms suddenly increased and the vehicle accelerated in reverse. The contact had to depress the brake pedal harder to prevent further acceleration. The failure was intermittent and becoming progressively worse. The vehicle had not been inspected or repaired. Also, the contact stated that the vehicle stalled but when she turned it off and restarted it, the problem corrected itself. The failure mileage was approximately 50,000 and the current mileage was approximately 54,000.
Also reported on the 2004 Hyundai Elantra
Control module (ECM/PCM/BCM) failure
Airbag warning light or occupant sensor fault
Other engine problem
Seat belt or retractor failure
Airbag failed to deploy in a crash
Other powertrain problem
How far this goes
This page is kept out of search results because 5 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 5 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 speed control problem happen on the 2004 Hyundai Elantra?
Across 5 owner reports that included an odometer reading, half were filed by 85,000 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 other speed control problem on the 2004 Hyundai Elantra?
5 reports have been filed with NHTSA, about 0.0 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