Control module (ECM/PCM/BCM) failure on the 2004 Chevrolet Malibu
1 crash 1 of the 23 reports for this failure mention a crash, a fire, an injury or a death. Those are the owner's words on the complaint form, not a verified finding, and one report can mention more than one.
When control module (ecm/pcm/bcm) failure gets reported
Owners of the 2004 Chevrolet Malibu report control module (ECM/PCM/BCM) failure at a median of 30,000 miles. A quarter of the reports come in before 30,000 miles and a quarter after 50,000 miles, from 13 reports that carried an odometer reading.
A part like this is normally expected to survive 92,000 miles. It is the 16th most-reported problem on this model year.
The mileage distribution
The reported range runs from 5,000 miles at the tenth percentile to 90,000 miles at the ninetieth, a spread of 86,009 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.
62% of the dated reports were filed under 36,000 miles.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| 5,500 miles | 29,000 miles | 29,000 miles | 52,000 miles | 91,509 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
Of these reports, 1 a crash is mentioned. Owners write their own complaints and the agency does not verify them, so read this as what the reports say happened rather than as a confirmed count.
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 2004 has 23. 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.
Had power steering fail on three occasions. Service light comes on in dashboard (car with wrench) and "power steering" displayed on information center. Steering became very difficult. After pulling over, turned off ignition. When restarted, everything normal. Both occurences at slow speed, thank goodness! Brake warning light appeared intermittently on panel, and directionals did not work. Turned off ignition and restarted - all back to normal. Brought to dealer, who had for over 1 week. Replaced "BCM" (body control module) and rerouted harness to obtain slack in cable. Three days after service, power-steering problem occured again. Currently returning for service. This problem is a definite safety hazard.*ak pe04031_cat
Had power steering fail on three occasions. Service light comes on in dashboard (car with wrench) and "power steering" displayed on information center. Steering became very difficult. After pulling over, turned off ignition. When restarted, everything normal. Both occurences at slow speed, thank goodness! Brake warning light appeared intermittently on panel, and directionals did not work. Turned off ignition and restarted - all back to normal. Brought to dealer, who had for over 1 week. Replaced "BCM" (body control module) and rerouted harness to obtain slack in cable. Three days after service, power-steering problem occured again. Currently returning for service. This problem is a definite safety hazard.*ak pe04031_cat
The vehicle ABS control module failed prior to the consumer acting on the notice received on june 21 ( NHTSA#04v190000). The failure resulted in an accident on june 28, 2004 while driving between 20 to 25 MPH. The consumer applied the brake but the ABS did not activate. As a result the driver hit the back of the vehicle in front of him. *nm *nm
Also reported on the 2004 Chevrolet Malibu
Other steering problem
Steering column or shaft failure
Loss of power steering
Steering rack, gear or tie rod failure
Other electrical problem
Other body or interior problem
How far this goes
Complaints are voluntary, so 23 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 2004 Chevrolet Malibu?
Across 13 owner reports that included an odometer reading, half were filed by 30,000 miles. A quarter were filed before 30,000 miles and a quarter after 50,000 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 2004 Chevrolet Malibu?
23 reports have been filed with NHTSA, about 0.3 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