Other engine problem on the 2016 Kia Optima
5 crashes 10 fires 5 injuries 20 of the 226 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 2016 Kia Optima report other engine problem at a median of 92,500 miles. A quarter of the reports come in before 55,000 miles and a quarter after 110,000 miles, from 89 reports that carried an odometer reading.
A part like this is normally expected to survive 95,000 miles. It is the 1st most-reported problem on this model year.
The mileage distribution
The reported range runs from 22,500 miles at the tenth percentile to 140,000 miles at the ninetieth, a spread of 117,242 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.
13% of the dated reports were filed under 36,000 miles.
The whole distribution
| 10th | 25th | Median | 75th | 90th |
|---|---|---|---|---|
| 22,400 miles | 53,769 miles | 92,000 miles | 110,000 miles | 139,642 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, 5 a crash, 10 a fire and 5 an injury 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 20 model years of this car. It shows up earliest on the 2006, at a median of 15,000 miles, and latest on the 2002 at 120,000 miles.
By volume the 2013 carries the most reports, with 444; the 2016 has 226. 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.
When starting from a dead stop, the car hesitates up to 6 or 7 seconds. I think it has stalled, then it starts again by its self. This is extremely dangerous when pulling out into an intersection. It does this constantly.
From a dead stop driving around, releasing the brake petal from a stop and getting ready to get going, the car shutters a bit and/or both the engine feels like it's gonna stall. Hesitation to get going.. Does it in all 3 drive modes. Dealers says npf.. Of course and said maybe quality of gas, I use top tier gas only.
Since I had the car in aug2016 brand new when I give it gas the valves ping and peak extremely bad not matter what fuel I use also the AC keeps loosing power it will blow fine then it almost goes off while still driving the same speed. Also sometimes when this happens I have a miss or hesitation in the engine. There has also been a pop noise in the back end when I stop or slow down since I have had the vehicle. I have taken my car 6 times to the local dealer in chas wv where I purchased the car and they keep saying they can't dignose the problem they have to contact kia and never have an answer wheh I take the car back or contact them.
Also reported on the 2016 Kia Optima
Excessive oil consumption
Other electrical problem
Other powertrain problem
Other body or interior problem
Other fuel system problem
Complete engine failure or seizure
How far this goes
Complaints are voluntary, so 226 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 2016 Kia Optima?
Across 89 owner reports that included an odometer reading, half were filed by 92,500 miles. A quarter were filed before 55,000 miles and a quarter after 110,000 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 2016 Kia Optima?
226 reports have been filed with NHTSA, about 6.4 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