Other fuel system problem on the 2004 Toyota Prius
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 other fuel system problem gets reported
There are 7 reports of other fuel system problem on the 2004 Toyota Prius, 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 90,000 miles. It is the 21st most-reported problem on this model year.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| — | — | 21,000 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 $300–$2,200 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 2009, at a median of 10,000 miles, and latest on the 2011 at 115,000 miles.
By volume the 2010 carries the most reports, with 43; the 2004 has 7. 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.
1) after breaking gently to a stop, the car switched to battery-mode and reported errors, including "check engine" 2) the car would not switch back to the gasoline engine, and could only be driven at 40mph on battery to the dealer 3) the dealer reported that the error codes suggested the onboard computer had to be reset, and once it was reset the car went back to normal operation
Dt:two weeks ago, the consumer was driving her 2004 toyota prius at 50 MPH and it died. Luckily it was not during rush hour traffic and occurred near an exit ramp. The consumer was able to maneuver to an exit ramp where she coasted downhill into an off street. The vehicle was towed to a dealer and they have had it for 2 weeks now and they stated the inverter that ties the hybrid to the gas system was the problem. The consumer feel this is a design flaw and feels that she should have been notified by toyota of this problem. *jb *sb
2004 toyota prius sedan. Stalls out while driving about 35 miles hour and the electric recharable battery drains. This has happened two times to me and I have taken it back to toyota deal for this. The 1st approximately jan -feb time frame. Dealer could find nothing wrong. 2nd time approximately early april. Dealer said had trouble code in computer and have corrected problem but let them know if happens again or any other problem. Engine load, automatic gear shifts hard and car rolls slightly when put into park.
Also reported on the 2004 Toyota Prius
Headlight failure or clouding
Other electrical problem
Other lighting problem
Other engine problem
Other speed control problem
Other brake problem
How far this goes
This page is kept out of search results because 7 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 7 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 fuel system problem happen on the 2004 Toyota Prius?
Across 6 owner reports that included an odometer reading, half were filed by 20,000 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 other fuel system problem on the 2004 Toyota Prius?
7 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