Control module (ECM/PCM/BCM) failure on the 2000 Ford Focus
When control module (ecm/pcm/bcm) failure gets reported
Owners of the 2000 Ford Focus report control module (ECM/PCM/BCM) failure at a median of 75,000 miles. A quarter of the reports come in before 50,000 miles and a quarter after 90,000 miles, from 9 reports that carried an odometer reading.
A part like this is normally expected to survive 92,000 miles. It is the 37th most-reported problem on this model year.
The mileage distribution
The reported range runs from 5,000 miles at the tenth percentile to 100,000 miles at the ninetieth, a spread of 97,713 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.
22% of the dated reports were filed under 36,000 miles.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| 4,600 miles | 50,500 miles | 76,000 miles | 89,766 miles | 102,313 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 14 model years of this car. It shows up earliest on the 2007, at a median of 15,000 miles, and latest on the 2006 at 160,000 miles.
By volume the 2012 carries the most reports, with 242; the 2000 has 22. 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.
Engine check light illuminated, and vehicle hesitated when trying to accelerate. Dealer determined that there was an electronic malfunction within the vehicle which was sending incorrect codes to the electronic control module. *ak
Ignition cylinder failed and was replaced. This is the third replacement of the ignition cylinder for this vehicle in a 36 month period. Even after the second replacement the cylinder "catches" when attempting to start the vehicle. The dealership claimed to find no problem when returned for correction. This latest failure fortunately occurred in a parking lot and not on the street. Failures have now occurred at milages and dates of: 4 october 2001- 18990 miles, 6 january 2004- 48926 miles, and 15 october 2004- 61543 miles. Part was retained by dealership.*ak
1/25/04 parked at meter in stamford ct, key wouldn't come out of ignition. Got it out, then wouldn't go back in. 20 minutes of sweating/swearing, got key back in. Had to leave it in the ignition (dangerous) until 2/12/04. Car to dillon ford, who replaced key cylinder for $210. Mileage 76,489. I saved broken ignition switch, if you want it. Replacement was a ford motorcraftco. Ignition switch sw-5997 xs4z-11582-aa. January 2005 broke again! Broadway auto replaced key ignition lock cylinder again for $250.00. Mileage 96,000. They gave me a copy of "ignition switch lock cylinder: all technical service bulletins, interior- ignition lock cylinder hard to turn. Posted 09/16/02. Article no. 02-18-2 2000 ford focus l4-121 2.0l sohc VIN p sfi copyright 2004 alldata 8.30 "use lock cylinder repair kit (xs4z-11582-aa)" this is the same cylinder that broke in my first replacement. I saved broken cylinder. Both cylinders have the code s 38 kb on barrel. Ford's aware of the problem, I.e., technical bulletin. Ford's using the same inferior part to replace the defective key cylinder, making over $200 each time. Nhts complaint site has 291…
Also reported on the 2000 Ford Focus
Other electrical problem
Ignition switch, key fob or immobilizer failure
Other engine problem
Fuel pump failure
Other body or interior problem
Other brake problem
How far this goes
Complaints are voluntary, so 22 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 2000 Ford Focus?
Across 9 owner reports that included an odometer reading, half were filed by 75,000 miles. A quarter were filed before 50,000 miles and a quarter after 90,000 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 2000 Ford Focus?
22 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