Other engine problem on the 2004 BMW X3
1 crash 1 fire 2 of the 12 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 other engine problem gets reported
Owners of the 2004 BMW X3 report other engine problem at a median of 95,000 miles. A quarter of the reports come in before 50,000 miles and a quarter after 145,000 miles, from 10 reports that carried an odometer reading.
A part like this is normally expected to survive 95,000 miles. It is the 2nd most-reported problem on this model year.
The mileage distribution
The reported range runs from 25,000 miles at the tenth percentile to 170,000 miles at the ninetieth, a spread of 145,400 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.
20% of the dated reports were filed under 36,000 miles.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| 25,800 miles | 52,000 miles | 93,000 miles | 146,750 miles | 171,200 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 and 1 a fire are 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 $300–$4,000 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 17 model years of this car. It shows up earliest on the 2020, at a median of 10,000 miles, and latest on the 2022 at 150,000 miles.
By volume the 2013 carries the most reports, with 53; the 2004 has 12. 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.
I have a 2004 330ci with a 6 spd transmission. This has happened in the past but this past weekend my car was in idle in traffic. My vehicle would do rough idling and the engine RPM would dip then surge eventually leading the car to lose engine power and die. This can be a safety concern when there is a possibly of someone rear ending you if the car just loses engine power. It's not a human problem but engine defect. *nm
Failure of crankcase ventilation valve in 2004 3 series bmw. This failure was caused by moisture build up in the valve, which then froze at an extremely cold temperature, causing the engine to seize. Apparently, bmw has known about this problem, as the replacement valve is "re-engineered". Apparently, this problem only occurs in the six cylinder engine, at extremely low temperature, and in cars which are used only in "short trips". The car has been down for over two weeks, awaiting parts. *nm
1. No advance warning. 2. Failure of pcv valve system, with resulting immediate consumption of engine oil through combustion process. Engine stalls and vehicle is brought to complete stop. The failure has occurred three times in the past 3 years. 3. Pcv related hardware replaced in first incident, with claim that "redesign" would prevent recurrence. Same in second and third incident. This is not only an inconvenient problem, it is also safety related, as the problem can result in the vehicle being immobilized in traffic. It is also not an isolated problem, based on what bmw technicians and other mechanics have related. *tr
Also reported on the 2004 BMW X3
Other body or interior problem
No-start or intermittent start failure
Other electrical problem
Airbag warning light or occupant sensor fault
Other powertrain problem
Other visibility problem
How far this goes
Complaints are voluntary, so 12 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 other engine problem happen on the 2004 BMW X3?
Across 10 owner reports that included an odometer reading, half were filed by 95,000 miles. A quarter were filed before 50,000 miles and a quarter after 145,000 miles. These are the mileages owners reported when they complained, not a prediction for any individual car.
How common is other engine problem on the 2004 BMW X3?
12 reports have been filed with NHTSA, about 0.4 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