Control module (ECM/PCM/BCM) failure on the 2005 Jeep Wrangler
When control module (ecm/pcm/bcm) failure gets reported
Owners of the 2005 Jeep Wrangler report control module (ECM/PCM/BCM) failure at a median of 75,000 miles. A quarter of the reports come in before 75,000 miles and a quarter after 140,000 miles, from 10 reports that carried an odometer reading.
A part like this is normally expected to survive 92,000 miles. It is the 10th most-reported problem on this model year.
The mileage distribution
The reported range runs from 70,000 miles at the tenth percentile to 140,000 miles at the ninetieth, a spread of 67,800 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.
0% of the dated reports were filed under 36,000 miles.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| 72,200 miles | 73,000 miles | 76,563 miles | 139,500 miles | 140,000 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 20 model years of this car. It shows up earliest on the 2021, at a median of 900 miles, and latest on the 1999 at 245,000 miles.
By volume the 2018 carries the most reports, with 38; the 2005 has 10. 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.
2005-2006 jeep wranglers are incurring an apparent large number of PCM/ecu failures (as evidenced in many online forums and a high backlog of PCM orders which jeep/chrysler is unable to fill or provide an eta for). The failure of the PCM reveals itself in many ways including emissions system failures (and resultant vehicle inspection failures I will add), transmissions failing to shift, hard forceful transmission shifts with vehicle lunges and more. On my vehicle specifically the o2 sensor codes are coming on and the vehicle will randomly not shift out of second gear which presents itself as a safety hazard when entering high speed freeways and interstates. The o2 sensors were replaced new with oem parts and the codes did not go away. The fault was traced by a reputable mechanic (christian brothers automotive) to the PCM and further online investigation indicates this a frequent and recurring issue. When I attempted to replace the PCM through jeep/chrysler I am unable to because the part is backlogged. I have placed a pricey $1600 order for the part but thus far (1 week) I have not been provided with an eta or any answers as to…
Over a period of several days the vehicle started shifting hard and eventually went into "limp" mode and started throwing different codes for various sensors. After many visits to different mechanics I researched the problem myself and pinpointed the PCM as the problem.
Over a period of several days the vehicle started shifting hard and eventually went into "limp" mode and started throwing different codes for various sensors. After many visits to different mechanics I researched the problem myself and pinpointed the PCM as the problem.
Also reported on the 2005 Jeep Wrangler
Fuel tank, filler or EVAP failure
Other fuel system problem
Other steering problem
Other suspension problem
Other engine problem
Other powertrain problem
How far this goes
Complaints are voluntary, so 10 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 2005 Jeep Wrangler?
Across 10 owner reports that included an odometer reading, half were filed by 75,000 miles. A quarter were filed before 75,000 miles and a quarter after 140,000 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 2005 Jeep Wrangler?
10 reports have been filed with NHTSA, about 0.5 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