Control module (ECM/PCM/BCM) failure on the 2007 Toyota Corolla
When control module (ecm/pcm/bcm) failure gets reported
Owners of the 2007 Toyota Corolla report control module (ECM/PCM/BCM) failure at a median of 45,000 miles. A quarter of the reports come in before 20,000 miles and a quarter after 65,000 miles, from 53 reports that carried an odometer reading.
A part like this is normally expected to survive 92,000 miles. It is the 3rd most-reported problem on this model year.
The mileage distribution
The reported range runs from 12,500 miles at the tenth percentile to 100,000 miles at the ninetieth, a spread of 88,831 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.
43% of the dated reports were filed under 36,000 miles.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| 11,662 miles | 19,000 miles | 44,000 miles | 66,000 miles | 100,493 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 2007 has 61. 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 2007 toyota corolla. When the vehicle is started, the instrumental panel lights dim and the air bag icon dims. The dealer stated that it was a factory defect that could not be corrected. The manufacturer stated that repairing the instrumental panel could cause other failures, and possibly a warranty violation. The dealer advised the contact to pay for the repair out of pocket. The speed and fuel type were unknown. The current mileage was 5,000 and failure mileage was 20. Updated 04/08/08. *lj
While operating this vehicle at approx 35mph, there was a sudden and complete loss of power. Engine continued to run smoothly but absolutely no acceleration or power. This caused the vehicle to slow to a stop at a very dangerous and busy intersection. I returned home at idle speed and placed the car in the garage. Check engine light was on. Days later I restarted the car and everything appeared ok and recovered. Check engine light eventually went out. Then it occurred again while making a right hand turn at another intersection. Very dangerous, very scary. The car was garaged and later towed to the dealership. The dealership conceded that the problem was the computer or ECM. There is a tsb concerning this and they are aware of this problem with toyota corollas. Fortunately, I still had 6k miles left on my warranty so this repair and the tow was covered by toyota. I was told that had this been an out of warranty the repair would have been $1300 for an 18month old car! I believe this is a safety issue and toyota should notify every owner of this vehicle for this possible problem. I also believe this defect should be repaired…
Our son was driving my car at approx 55 MPH, in the afternoon, in cool clear spring weather... A clunk was heard, the engine died, he was lucky to find a wide spot to pull off the rural two lane highway and coast to a stop. The vehicle was towed to a dealer, diagnoses revealed dtc 607 ECM performance, description computer,engine . The computer was defective, and was replaced with 1 quantity....fp number 89661-02k21 computer for the engine under warranty. (31,858 miles on odometer) thurston's dealership in ukiah gave us great service and a quick turn around time enabling son to commute to college once again with little inconvenience. I'm greatly concerned about this incident and hope my data submission will serve to alert service departments, manufacturers and investigators to our experience with the engine computer chip defect. I want to help prevent the possibility of other drivers being placed in a potentially hazardous situation of loss of engine computer control while driving. *tr
Also reported on the 2007 Toyota Corolla
Airbag inflator rupture
Other speed control problem
Other engine problem
Other electrical problem
Other steering problem
Other brake problem
How far this goes
Complaints are voluntary, so 61 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 2007 Toyota Corolla?
Across 53 owner reports that included an odometer reading, half were filed by 45,000 miles. A quarter were filed before 20,000 miles and a quarter after 65,000 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 2007 Toyota Corolla?
61 reports have been filed with NHTSA, about 0.4 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