Unclassified problem on the 2015 Nissan Leaf
Only 3 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 unclassified problem gets reported
There are 10 reports of unclassified problem on the 2015 Nissan Leaf, 3 with a mileage attached. That is too few to place the failure on the odometer with any confidence.
It is the 29th most-reported problem on this model year.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| — | — | 12,000 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.
The same failure on other years
The same failure is reported on 10 model years of this car. It shows up earliest on the 2018, at a median of 5,000 miles, and latest on the 2011 at 55,000 miles.
By volume the 2019 carries the most reports, with 32; the 2015 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.
I was driving in somewhat heavy traffic in an urban setting at 25mph when, unexpectedly, I had great difficulty applying the brakes to stop at an intersection. It took considerable effort, including swerving, to avoid hitting the vehicle in front of me, and I pulled into a parking lot as soon as I was able, again having great trouble stopping. The loss of control of the brakes felt like I was skidding on snow or ice, despite the fact that it was a fairly warm august day. There was an accompanying loud, unpleasant sound coming from the brakes when I stomped on them. I had also noticed that a number of warning lights on the dash had come on all at the same time when the problem started. After coming to a complete stop in the parking lot, I turned the vehicle on and off many times, and each time, there was a low but clearly audible thrumming sound, plus a vibration I could feel in the brakes. The sound was particularly surprising to hear, given that the vehicle is otherwise an extremely quiet (100% electric) vehicle. After attempting to restart the vehicle about ten times, I decided to leave to wait for awhile before attempting to…
Also reported on the 2015 Nissan Leaf
Other brake problem
Loss of braking
Parking brake failure
ABS module or sensor failure
Other electrical problem
Other speed control problem
How far this goes
This page is kept out of search results because 10 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 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 unclassified problem happen on the 2015 Nissan Leaf?
Across 3 owner reports that included an odometer reading, half were filed by 10,000 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 unclassified problem on the 2015 Nissan Leaf?
10 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