2015 Nissan Leaf: what breaks, and at what mileage

What owners report breaking

Owners have reported 28 named failure modes on the 2015 Nissan Leaf, and the three most-reported carry 53% of everything filed.

Other brake problem leads with 42 reports, about 0.7 per 1,000 vehicles and with the middle half of reports between 17k to 37,500 miles.

Loss of braking follows with 22 reports, usually reported between 2k to 50,000 miles.

Parking brake failure follows with 13 reports, usually reported between 32k to 70,000 miles.

By system, the reports fall mostly into brakes (88), electrical (9) and adas (9).

What happens when these parts fail

Across the named modes, 9 mention a crash and 3 an injury. Those are the words owners used in their own complaints, and NHTSA does not verify them, but they are the closest thing in this data to a measure of what a failure actually did.

The average severity weight across every report on this year is 4.53, where a stalled engine or a failed airbag weighs many times more than a rattling trim panel, and a figure this high means the reports are dominated by failures with safety consequences rather than annoyances. The weighting is set out in full on the methodology page.

What the top failures cost to put right, as editorial estimates for an independent US shop rather than figures from NHTSA: other brake problem at $300–$1,800, loss of braking at $400–$3,000, parking brake failure at $250–$1,300 and ABS module or sensor failure at $500–$2,400. Dealer labour, a seized bolt or a part that is no longer made can push any of these past the top of its range.

7% of the reports on this year sit in the engine, transmission, drivetrain or cooling systems — the four where a repair bill is usually four figures.

How often, against how many were built

Scaled by an estimate of how many of these cars exist, the 2015 Nissan Leaf draws about 2.3 per 1,000 vehicles, which puts it in the 79th percentile of complaint rates among 2015 vehicles we can rate.

That denominator is the weakest number on the page and it is fair to say so plainly. Rate per 1,000 uses a fleet-size estimate derived from recall paperwork for this exact model year. It is a lower bound.

The working figure is 62,206 vehicles. If the true number is twice that, every rate on this page is half what it says; the ranking against other 2015 vehicles, which is what the risk score uses, is far more robust than the rate itself.

Recalls on the 2015 model year

NHTSA has issued 4 recall campaigns covering the 2015 Nissan Leaf, affecting an estimated 101,699 vehicles. A recall is a different kind of evidence from a complaint: it is the regulator and the manufacturer agreeing that something has to be fixed, and the fix is free for as long as the car exists.

The campaigns cover visibility:defroster/defogger/hvac system, air bags, air bags:sensor:occupant classification and service brakes. Whether the work was actually done on the car in front of you is a question only the VIN can answer, and the manufacturer or NHTSA will answer it free.

Recalls also distort complaint counts. Publicity about a campaign reminds owners that complaining is possible, so reports for a recalled component often spike after the recall rather than before it.

How 2015 compares with the other years

High risk for a 2015 — 143rd riskiest of the 273 2015 vehicles we can rate. The comparison is always within the same model year, so an older car is never penalised for having had longer to break.

Across the 13 model years of this car that carry enough reports to score, 2011 comes out best at 68 and 2018 worst at 78, with 2015 itself at 72.

If the model year is negotiable, 2011 and 2014 score lower than 2015 by a margin worth acting on. Same body, same engines, different luck — usually a supplier change or a mid-cycle fix, which the complaint data can show but never explain.

Within the 2010–2017 generation specifically, 2011 is the strongest year at 68 and 2015 the weakest at 72.

What the numbers say to check

The mileages below are where the first quarter of reports for each mode had already been filed, which makes them the point at which a fault is worth looking for rather than the point at which it happens: loss of braking from about 2k, other brake problem from about 17k and parking brake failure from about 32k.

On a 2015 Nissan Leaf with more miles than that on it, the useful question to put to a seller or a mechanic is whether loss of braking has been dealt with, and if so with what parts and at whose expense. A car that has already had the repair is in a different position from one that has not.

None of this is a diagnosis. It is a list of what other owners of the same model year reported, ordered by when they reported it, which is a good place to point an inspection and a poor place to stop.

Where these figures stop being useful

144 owner reports; fleet size estimated from this year's own recall paperwork. Every count on this page is therefore a floor: it is the number of owners who went to the trouble of filing with a federal agency, which is a small and self-selected fraction of the owners who had the fault.

Of those 144 reports, 89 carried an odometer reading, so the mileages here describe 62% of the sample rather than all of it. Owners also round: readings pile up on multiples of ten thousand, which is why this site publishes "about 90,000 miles" and not "91,438".

Named failure modes come from matching phrases in the complaint text, so a badly worded complaint can land in the wrong bucket. The effect washes out across hundreds of reports and does not wash out across five.

And nothing here predicts what one car will do. These are other people's complaints, filed years apart, on cars maintained by strangers. Read the page as a map of where this model year has previously gone wrong, then have the specific car in front of you inspected.