2020 Kia Optima: what breaks, and at what mileage
What breaks on the 2020 Kia Optima
On the 2020 Kia Optima, the failure owners report most often is other engine problem, with 54 reports on file. Across every failure mode on this year, half the dated reports were filed before 47,500 miles. Overall it scores 73 out of 100, high risk for a 2020.
High risk for a 2020 — 168th riskiest of the 235 2020 vehicles we can rate. 207 owner reports; fleet size borrowed from other years of the same model.
What owners report breaking
Owners have reported 41 named failure modes on the 2020 Kia Optima, and the three most-reported carry 45% of everything filed.
Other engine problem leads with 54 reports and about 1.7 per 1,000 vehicles.
Excessive oil consumption follows with 24 reports, median 90,000 miles. 2 of those reports mention a fire.
Other electrical problem follows with 15 reports.
By system, the reports fall mostly into engine (88), transmission (21) and electrical (18).
At what mileage it happens
34 of the reports on the 2020 Kia Optima came with an odometer reading, and half of those were filed before 47,500 miles.
Cumulatively, 50% by 50,000 miles and 71% by 100,000 miles of the dated reports had been filed.
The busiest stretch is between 0 and 10,000 miles, which alone holds 32% of the dated reports.
38% of the dated reports were filed below 36,000 miles, which is early enough that a fair number of these cars were still under a factory warranty when the owner complained.
Tick median reported mileage Solid middle half of reports Faint 10th to 90th percentile Colour how bad the failure is when it happens
Showing the 12 most-reported failure modes of 41. The full list is in the table below.
How reports accumulate
Every report with an odometer reading, cumulative, from 0 to 200,000 miles. A curve that climbs early is a car with early problems, whatever its total.
- Line share of reports filed by that mileage
- Dashed the median reported mileage
Severity, and what it costs
Across the named modes, 7 mention a crash, 4 a fire and 4 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 4.27, 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 engine problem at $300–$4,000, excessive oil consumption at $900–$6,500, other electrical problem at $250–$2,000 and other powertrain problem at $400–$4,500. Dealer labour, a seized bolt or a part that is no longer made can push any of these past the top of its range.
53% 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, so more than half of what owners complained about here is expensive.
Every reported failure mode
| Failure mode | System | Reports | With reading | 25th | Median | 75th | Per 1,000 | Typical repair | Severity |
|---|---|---|---|---|---|---|---|---|---|
| Other engine problem | engine | 54 | 6 | — | 116k | — | 1.7 | $300–$4,000 | High |
| Excessive oil consumption | engine | 24 | 3 | — | 91k | — | 0.7 | $900–$6,500 | High |
| Other electrical problem | electrical | 15 | 0 | — | — | — | 0.5 | $250–$2,000 | Moderate |
| Other powertrain problem | transmission | 14 | 0 | — | — | — | 0.4 | $400–$4,500 | High |
| Other fuel system problem | fuel | 7 | 1 | — | 40k | — | 0.2 | $300–$2,200 | High |
| Seat belt or retractor failure | airbag | 6 | 4 | — | 86k | — | 0.2 | $200–$900 | High |
| Other brake problem | brakes | 6 | 6 | — | 5k | — | 0.2 | $300–$1,800 | High |
| Other steering problem | steering | 6 | 0 | — | — | — | 0.2 | $350–$2,400 | High |
| ABS module or sensor failure | brakes | 5 | 0 | — | — | — | 0.2 | $500–$2,400 | High |
| Other speed control problem | adas | 5 | 1 | — | 20 | — | 0.2 | $250–$2,000 | Critical |
| Oil leak | engine | 4 | 0 | — | — | — | 0.1 | $250–$2,200 | Moderate |
| Airbag failed to deploy in a crash | airbag | 4 | 2 | — | 13k | — | 0.1 | $1,000–$5,000 | Critical |
| Stalling while driving | engine | 3 | 1 | — | 72k | — | 0.1 | $300–$2,500 | Critical |
| Dual-clutch or clutch-pack failure | transmission | 3 | 0 | — | — | — | 0.1 | $1,800–$5,500 | High |
| Cruise control failure | adas | 3 | 2 | — | 8k | — | 0.1 | $200–$1,400 | High |
| Air conditioning failure | hvac | 3 | 0 | — | — | — | 0.1 | $400–$2,800 | Moderate |
| Misfire or rough idle | engine | 2 | 1 | — | 123k | — | 0.1 | $250–$1,600 | Moderate |
| Complete transmission failure | transmission | 2 | 1 | — | 50k | — | 0.1 | $2,800–$8,000 | Critical |
| Fuel injector failure | fuel | 2 | 0 | — | — | — | 0.1 | $450–$2,800 | Moderate |
| Fuel tank, filler or EVAP failure | fuel | 2 | 0 | — | — | — | 0.1 | $250–$1,800 | Moderate |
| Ignition switch, key fob or immobilizer failure | electrical | 2 | 0 | — | — | — | 0.1 | $250–$1,500 | High |
| Parking brake failure | brakes | 2 | 1 | — | 6k | — | 0.1 | $250–$1,300 | Moderate |
| Other lighting problem | lighting | 2 | 0 | — | — | — | 0.1 | $120–$1,200 | Moderate |
| Other driver assistance problem | adas | 2 | 1 | — | 100k | — | 0.1 | $250–$1,800 | High |
| Other body or interior problem | body | 2 | 0 | — | — | — | 0.1 | $200–$2,000 | Moderate |
| Complete engine failure or seizure | engine | 1 | 0 | — | — | — | 0.0 | $4,500–$12,000 | Critical |
| Transmission will not engage a gear | transmission | 1 | 0 | — | — | — | 0.0 | $1,500–$6,000 | Critical |
| Torque converter failure | transmission | 1 | 0 | — | — | — | 0.0 | $1,100–$3,200 | High |
| Wheel bearing or hub failure | drivetrain | 1 | 0 | — | — | — | 0.0 | $350–$1,200 | Moderate |
| Control module (ECM/PCM/BCM) failure | electrical | 1 | 0 | — | — | — | 0.0 | $700–$3,000 | High |
| Infotainment screen failure | infotainment | 1 | 0 | — | — | — | 0.0 | $400–$2,600 | Low |
| Backup camera failure | infotainment | 1 | 0 | — | — | — | 0.0 | $250–$1,200 | Moderate |
| Instrument cluster or gauge failure | infotainment | 1 | 0 | — | — | — | 0.0 | $350–$1,400 | Moderate |
| Master cylinder or brake booster failure | brakes | 1 | 0 | — | — | — | 0.0 | $450–$2,200 | Critical |
| Premature brake pad or rotor wear | brakes | 1 | 0 | — | — | — | 0.0 | $300–$1,400 | Moderate |
| Blind spot monitor failure | adas | 1 | 0 | — | — | — | 0.0 | $250–$1,300 | Moderate |
| Tire blowout or tread separation | wheels | 1 | 0 | — | — | — | 0.0 | $200–$1,500 | Critical |
| Paint peeling or clear coat failure | body | 1 | 0 | — | — | — | 0.0 | $600–$6,000 | Low |
| Sunroof failure or glass breakage | body | 1 | 0 | — | — | — | 0.0 | $700–$4,500 | High |
| Tail light, brake light or signal failure | lighting | 1 | 0 | — | — | — | 0.0 | $100–$900 | Moderate |
| Other visibility problem | glass | 1 | 1 | — | 58k | — | 0.0 | $150–$1,400 | Moderate |
| Unclassified problem | other | 11 | 3 | — | 4k | — | 0.3 | — | Moderate |
This year had no usable recall paperwork, so the fleet-size estimate is the median of other years of the same model. Repair costs are typical independent-shop ranges for the failure, not figures from these reports.
How often, against how many were built
Scaled by an estimate of how many of these cars exist, the 2020 Kia Optima draws about 6.3 per 1,000 vehicles, which puts it in the 87th percentile of complaint rates among 2020 vehicles we can rate.
That denominator is the weakest number on the page and it is fair to say so plainly. This year had no usable recall paperwork, so the fleet-size estimate is the median of other years of the same model.
The working figure is 32,679 vehicles. If the true number is twice that, every rate on this page is half what it says; the ranking against other 2020 vehicles, which is what the risk score uses, is far more robust than the rate itself.
How it ranks in the 2020 field
The score at the top of the page, placed among its peers. The zones are the same thresholds the scorer applies, read out of the scorer itself, so the picture and the band word cannot disagree.
Scores are ranked within the model year, never across years, because an older car has had longer to accumulate reports.
- Left fewer and less serious reports
- Right more, or worse
- Marker this vehicle
Better and worse years of the same car
High risk for a 2020 — 168th riskiest of the 235 2020 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 20 model years of this car that carry enough reports to score, 2005 comes out best at 57 and 2019 worst at 80, with 2020 itself at 73.
If the model year is negotiable, 2005, 2003, 2007, 2006, 2004, 2002, 2010, 2009, 2001 and 2008 score lower than 2020 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 2017–2020 generation specifically, 2020 is the strongest year at 73 and 2019 the weakest at 80.
Scores compare each year against other cars of the same model year, so a low number on an older car is a real result and not an artefact of age.
Shorter is better. Years with too few reports to score are shown without a bar rather than as a zero, because no data is not good news.
Within the 2017-2020 generation, 2020 Kia Optima scores best at 73 and 2019 Kia Optima worst at 80.
Where these figures stop being useful
207 owner reports; fleet size borrowed from other years of the same model. 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 207 reports, 34 carried an odometer reading, so the mileages here describe 16% 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".
The failure modes are assigned by software reading the owner's own words, which is accurate in bulk and wrong in individual cases. A mode with a handful of reports may contain a misfiled one.
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.
Questions this page answers
What are the most common problems with the 2020 Kia Optima?
The most-reported failures are other engine problem (54 reports, median 115,000 miles), excessive oil consumption (24 reports, median 90,000 miles) and other electrical problem (15 reports). Counts come from owner complaints filed with NHTSA, which are voluntary, so they show what owners bothered to report rather than every fault that occurred.
Is the 2020 Kia Optima reliable?
It scores 73 out of 100 on our risk index, which is high — 168th riskiest of the 235 2020 vehicles we can rate. The score is a comparison against other 2020 vehicles, not a prediction about any individual car, and it is built from complaint rates, severity and how early failures appear.
Which year of the Kia Optima is best?
Within the 2017–2020 generation, 2020 scores best at 73 out of 100 and 2019 worst at 80. Same body, same engines, different luck.
Where this comes from. Every figure above is computed from NHTSA owner complaints and recall records for this exact make, model and year. Complaints are voluntary and self-selected, so treat counts as a floor. The methodology page writes out each formula, and the same numbers are available as JSON.
What breaks at my mileage Compare with another car
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