Control module (ECM/PCM/BCM) failure on the 2009 Toyota Corolla
When control module (ecm/pcm/bcm) failure gets reported
Owners of the 2009 Toyota Corolla report control module (ECM/PCM/BCM) failure at a median of 90,000 miles. A quarter of the reports come in before 50,000 miles and a quarter after 105,000 miles, from 14 reports that carried an odometer reading.
A part like this is normally expected to survive 92,000 miles. It is the 19th most-reported problem on this model year.
The mileage distribution
The reported range runs from 45,000 miles at the tenth percentile to 130,000 miles at the ninetieth, a spread of 85,550 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.
7% of the dated reports were filed under 36,000 miles.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| 43,100 miles | 48,000 miles | 90,000 miles | 105,000 miles | 128,650 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 2010, at a median of 5,000 miles, and latest on the 2013 at 190,000 miles.
By volume the 2006 carries the most reports, with 87; the 2009 has 15. 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.
My 2009 toyota corolla has a steering problem especially at higher speeds. The vehicle wants to drift out of lane. Constant corrective steering wheel action is required. It seems that the control module does not know where center is or how to maintain center. *tr
During slow speeds or stopped when I press on the gas pedal to move forward the car's check engine light comes on and I can't move forward until I turn the car off, then back on. This has happened at stop lights, in parking garages, and even on the interstate. Not safe! This is my third time taking my vehicle to the toyota dealership to fix the same problem. I paid $900 to fix the ecu (which they told me was the issue), but the same problem keeps happening. The second time I took it in they fixed something with the brake lights, now the third time they fixed something with a short to the brakes ... Something about the taillights blinking rapidly? I doubt the problem is fixed and I am very frustrated to pay that kind of money with no refund when the same issue keeps happening. A very similar issue happened in a recall with the 2005-2008 corolla/matrix models and they had the ECM fixed with no charge. Sounds like the same problem to me. *tr
During slow speeds or stopped when I press on the gas pedal to move forward the car's check engine light comes on and I can't move forward until I turn the car off, then back on. This has happened at stop lights, in parking garages, and even on the interstate. Not safe! This is my third time taking my vehicle to the toyota dealership to fix the same problem. I paid $900 to fix the ecu (which they told me was the issue), but the same problem keeps happening. The second time I took it in they fixed something with the brake lights, now the third time they fixed something with a short to the brakes ... Something about the taillights blinking rapidly? I doubt the problem is fixed and I am very frustrated to pay that kind of money with no refund when the same issue keeps happening. A very similar issue happened in a recall with the 2005-2008 corolla/matrix models and they had the ECM fixed with no charge. Sounds like the same problem to me. *tr
Also reported on the 2009 Toyota Corolla
Airbag inflator rupture
Other steering problem
Other speed control problem
Other brake problem
Other engine problem
Other body or interior problem
How far this goes
Complaints are voluntary, so 15 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 Toyota Corolla?
Across 14 owner reports that included an odometer reading, half were filed by 90,000 miles. A quarter were filed before 50,000 miles and a quarter after 105,000 miles. 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 Toyota Corolla?
15 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