Control module (ECM/PCM/BCM) failure on the 2009 Chevrolet Malibu
When control module (ecm/pcm/bcm) failure gets reported
Owners of the 2009 Chevrolet Malibu report control module (ECM/PCM/BCM) failure at a median of 82,500 miles. A quarter of the reports come in before 47,500 miles and a quarter after 105,000 miles, from 39 reports that carried an odometer reading.
A part like this is normally expected to survive 92,000 miles. It is the 12th most-reported problem on this model year.
The mileage distribution
The reported range runs from 15,000 miles at the tenth percentile to 137,500 miles at the ninetieth, a spread of 121,622 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.
23% of the dated reports were filed under 36,000 miles.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| 15,578 miles | 48,000 miles | 82,997 miles | 105,500 miles | 137,200 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 24 model years of this car. It shows up earliest on the 2019, at a median of 15,000 miles, and latest on the 2013 at 110,000 miles.
By volume the 2010 carries the most reports, with 97; the 2009 has 50. 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 2009 chevrolet malibu. The contact stated that while driving 45 MPH, the vehicle would down shift while accelerating. As a result, the vehicle would suddenly decelerate. In order to shift the vehicle back into its proper gear, the contact had to shift the vehicle into manual mode and use the optional pedal shifts. The contact also stated that the brake lights would illuminate when the brake pedal was not being depressed and the traction control and electronic stability control lights intermittently illuminated on the instrument panel. An authorized dealer was notified and the contact was informed that the body control module may need to be replaced. The vehicle was not taken to have the failure diagnosed. The failure mileage was 59,000.
Tl* the contact owns a 2009 chevrolet malibu. The contact stated that when driving at various speeds, the service traction, service esc and esc off warning lamps illuminated. The vehicle was taken to the dealer where the technician advised that the body control module was defective and needed to be replaced. The manufacturer was made aware of the failure but only offered to cover part of the repair costs. The vehicle was not repaired. The failure mileage was 30,000 and the current mileage was 67,000. ..updated 01/16/2013 *bf the consumer stated when the driver's foot is on the brake the brake lights go off. Upon taking foot off the brake the brake lights stay on. This happens when the service traction light comes on. Updated 1/28/2013 *js
Tl* the contact owns a 2009 chevrolet malibu. The contact stated that when driving at various speeds, the service traction, service esc and esc off warning lamps illuminated. The vehicle was taken to the dealer where the technician advised that the body control module was defective and needed to be replaced. The manufacturer was made aware of the failure but only offered to cover part of the repair costs. The vehicle was not repaired. The failure mileage was 30,000 and the current mileage was 67,000. ..updated 01/16/2013 *bf the consumer stated when the driver's foot is on the brake the brake lights go off. Upon taking foot off the brake the brake lights stay on. This happens when the service traction light comes on. Updated 1/28/2013 *js
Also reported on the 2009 Chevrolet Malibu
Other steering problem
Other electrical problem
Other driver assistance problem
Cruise control failure
Loss of power steering
Other body or interior problem
How far this goes
Complaints are voluntary, so 50 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 Chevrolet Malibu?
Across 39 owner reports that included an odometer reading, half were filed by 82,500 miles. A quarter were filed before 47,500 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 Chevrolet Malibu?
50 reports have been filed with NHTSA, about 0.7 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