Control module (ECM/PCM/BCM) failure on the 2009 Volkswagen Jetta
6 crashes 6 of the 61 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 2009 Volkswagen Jetta report control module (ECM/PCM/BCM) failure at a median of 112,500 miles. A quarter of the reports come in before 70,000 miles and a quarter after 142,500 miles, from 46 reports that carried an odometer reading.
A part like this is normally expected to survive 92,000 miles. It is the 6th most-reported problem on this model year.
The mileage distribution
The reported range runs from 40,000 miles at the tenth percentile to 165,000 miles at the ninetieth, a spread of 126,000 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.
11% of the dated reports were filed under 36,000 miles.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| 40,000 miles | 69,750 miles | 111,500 miles | 143,000 miles | 166,000 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
Of these reports, 6 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 16 model years of this car. It shows up earliest on the 2019, at a median of 5,000 miles, and latest on the 2000 at 115,000 miles.
By volume the 2009 is the worst of them, which makes this a problem of this specific year rather than of the model as a whole.
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.
My vehicle experiences brief hesitation during acceleration usually in 3rd gear and it occurs intermittently, sometimes 2-3 times/day and sometimes 2-3 times/week. Sometimes it feels very minor, like the engine was starved for fuel and sometimes it is more severe, and the whole car jerks. I have a manual transmission and have experienced it and reported it to the dealer multiple times with replication only once, when the service manager was riding with me. He ordered a part and replaced it and they have downloaded ECM updates multiple times with no results. *tr
Sunroof drainage tubes became unglued from the draining nipples that attach to the panoramic sunroof assembly causing a large water leaks every time it rained. The a, b, c, and d interior pillars and headliner became soaked as did the interior carpets and other components including the fuse panel box and central electronics control module (cecm) behind the driver's side dash causing intermittent electrical shorts and drivability issues. This is a real safety hazard that has afflicted many vw sedans with the standard glass sunroof and wagons equipped with the optional panoramic glass sunroof. Evidence of other failures of these components has been documented on many vw advocate forums but no vw tsb or recall campaigns have been issued to date to address this defect. The repair is very costly (4-5 hours of labor plus parts). A class-action lawsuit is currently underway for this same defect for many volkswagen cars up to 2009 but the same defect persist in 2009 and newer jetta sedans and sportwagens with sunroofs. I urge the ntsa to investigate this safety hazard on affected vw vehicles from 2009-2012. *tr
Tl* the contact owns a 2009 volkswagen jetta. The contact stated that the engine light illuminated. The vehicle was taken to the dealer who performed a diagnostic test which located the failure within the exhaust control module. The dealer replaced the exhaust module under the warranty; however, the failure was not corrected. The exhaust system control module failed again. A second diagnostic test was performed by a local mechanic which located the failure in the exhaust sensor which made it impossible for the exhaust emission gate to open or close. The check engine light illuminated. The vehicle was repaired and the exhaust flap door was lubricated. The manufacturer was made aware of the failure. The failure mileage was 60,000 and the current mileage was 110,000.
Also reported on the 2009 Volkswagen Jetta
Fuel pump failure
ABS module or sensor failure
Other powertrain problem
Other engine problem
Other fuel system problem
No-start or intermittent start failure
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 2009 Volkswagen Jetta?
Across 46 owner reports that included an odometer reading, half were filed by 112,500 miles. A quarter were filed before 70,000 miles and a quarter after 142,500 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 Volkswagen Jetta?
61 reports have been filed with NHTSA, about 6.2 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