Fuel pump failure on the 2009 BMW 3 Series
Only 6 reports for this mode came with an odometer reading, which is too few for percentiles to mean anything. The page is here because someone linked to it; treat the figures as anecdotes, and see the full report for this year instead.
When fuel pump failure gets reported
There are 6 reports of fuel pump failure on the 2009 BMW 3 Series, 6 with a mileage attached. That is too few to place the failure on the odometer with any confidence.
A part like this is normally expected to survive 85,000 miles. It is the 2nd most-reported problem on this model year.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| — | — | 63,900 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 $600–$2,600 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 4 model years of this car. It shows up earliest on the 2006, at a median of 10,000 miles, and latest on the 2009 at 65,000 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.
2009 bmw 335i, high pressure fuel pump failure. 9500 miles on vehicle. Engine is slow to start. While driving and RPM above 3000, check engine light comes on and engine reduces power significantly. If pump were to fail completely, engine would die, leaving driver without power steering. This could be a major safety problem on highways with dense traffic. After reading internet blogs on vehicle, this is a known defect for bmw n54 engines. Some drivers have had the pump replaced multiple times with same outcome each time. *tr
On thursday, august 18, 2011, my 2009 328i shut down without notice in the middle lane of I-90 at mile marker 80.002 about a mile from ohare airport in chicago. It was unable to restart and I was left to call 911 and spend 10 minutes waiting for DOT to tow me off the middle of the highway and to a residential neighborhood to wait another hour for aaa to tow my car to perillo bmw in chicago to assess the issue. June 15th 2011: about 3 hours after bringing my car into the zimbrick bmw service facility to have a set of after-market LED lights installed at cost, the service engine soon light appeared illuminated on my dashboard. As I had never seen this light appear on my less than 2 year old car before, I immediately called the person who was head of your service department to discuss how this light could appear for the first time after having my car in hours earlier on a service appointment that should not have touched the engine. A loaner car was promptly driven to my office, to check into the issue and take my car back to the dealership for further inspection, if necessary. The following is the conversation that transpired between…
On thursday, august 18, 2011, my 2009 328i shut down without notice in the middle lane of I-90 at mile marker 80.002 about a mile from ohare airport in chicago. It was unable to restart and I was left to call 911 and spend 10 minutes waiting for DOT to tow me off the middle of the highway and to a residential neighborhood to wait another hour for aaa to tow my car to perillo bmw in chicago to assess the issue. June 15th 2011: about 3 hours after bringing my car into the zimbrick bmw service facility to have a set of after-market LED lights installed at cost, the service engine soon light appeared illuminated on my dashboard. As I had never seen this light appear on my less than 2 year old car before, I immediately called the person who was head of your service department to discuss how this light could appear for the first time after having my car in hours earlier on a service appointment that should not have touched the engine. A loaner car was promptly driven to my office, to check into the issue and take my car back to the dealership for further inspection, if necessary. The following is the conversation that transpired between…
Also reported on the 2009 BMW 3 Series
Seat belt or retractor failure
Airbag inflator rupture
Other electrical problem
Water pump failure
Airbag warning light or occupant sensor fault
DPF, EGR or DEF system failure
How far this goes
This page is kept out of search results because 6 reports is not enough to publish percentiles from. It stays reachable because somebody looking at this exact car would rather see the reports than be told there are none.
Complaints are voluntary, so 6 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 fuel pump failure happen on the 2009 BMW 3 Series?
Across 6 owner reports that included an odometer reading, half were filed by 65,000 miles. A quarter were filed before — and a quarter after —. These are the mileages owners reported when they complained, not a prediction for any individual car.
How common is fuel pump failure on the 2009 BMW 3 Series?
6 reports have been filed with NHTSA, about 0.2 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