Control module (ECM/PCM/BCM) failure on the 2009 Hyundai Elantra
Only 3 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 control module (ecm/pcm/bcm) failure gets reported
There are 3 reports of control module (ECM/PCM/BCM) failure on the 2009 Hyundai Elantra, 3 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 92,000 miles. It is the 21st most-reported problem on this model year.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| — | — | 102,000 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
Putting it right typically runs $700–$3,000 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 12 model years of this car. It shows up earliest on the 2017, at a median of 2 miles, and latest on the 2009 at 100,000 miles.
By volume the 2004 carries the most reports, with 36; the 2009 has 3. 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 took my vehicle to wilson hyundai for the recalls to be corrected. I was also having issues with an air bag light and a clicking noise in the steering wheel. I received a call telling me my steering column needed to be replaced because there was a short in the sensors to a module. I was then told that the sensor to my passenger seat had malfunctioned and that I needed to replace the entire bottom portion of the seat. They were wanting to charge me over $6,000.00 to repair these two issues. There are recalls on both of these issues: NHTSA 15v100000 addresses issues with the steering and the fix does not include or require the replacement of the entire steering column. The solution for this recall is to reprogram the computer. This does not address the clicking noise in the column where a gear/cog disintegrates over time.... A $12.00 part is estimated to cost over $500 in labor to replace. The issue with the air bag malfunctioning is addressed in 2009 hyundai elantra air bags: frontal: sensor/ control module NHTSA campaign #11v143000. I am being told that this issue is only for certain 2007-2009 elantras manufactured before nov 1…
I took my vehicle to wilson hyundai for the recalls to be corrected. I was also having issues with an air bag light and a clicking noise in the steering wheel. I received a call telling me my steering column needed to be replaced because there was a short in the sensors to a module. I was then told that the sensor to my passenger seat had malfunctioned and that I needed to replace the entire bottom portion of the seat. They were wanting to charge me over $6,000.00 to repair these two issues. There are recalls on both of these issues: NHTSA 15v100000 addresses issues with the steering and the fix does not include or require the replacement of the entire steering column. The solution for this recall is to reprogram the computer. This does not address the clicking noise in the column where a gear/cog disintegrates over time.... A $12.00 part is estimated to cost over $500 in labor to replace. The issue with the air bag malfunctioning is addressed in 2009 hyundai elantra air bags: frontal: sensor/ control module NHTSA campaign #11v143000. I am being told that this issue is only for certain 2007-2009 elantras manufactured before nov 1…
Also reported on the 2009 Hyundai Elantra
Other steering problem
Steering column or shaft failure
Airbag warning light or occupant sensor fault
Loss of power steering
Other speed control problem
Other electrical problem
How far this goes
This page is kept out of search results because 3 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 3 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 control module (ecm/pcm/bcm) failure happen on the 2009 Hyundai Elantra?
Across 3 owner reports that included an odometer reading, half were filed by 100,000 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 control module (ecm/pcm/bcm) failure on the 2009 Hyundai Elantra?
3 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