Built from official NHTSA complaint and recall data · data through 07/12/2026
High complaint levelIts most-reported problem — Engine — runs 4.9× the fleet median for that category across the 2583 model-years tracked on this site.
998Complaints
4Recalls
31Crashes
71Fires
23Injured
1Deaths
Source: U.S. NHTSA complaint & recall data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.
Is this problem acknowledged?
The most-reported problem — Engine (61.8% of complaints) — was examined in a now-closed NHTSA investigation that did not result in a recall.
Engine complaints here are 4.9× the median for that category across the 2583 model-years tracked on this site.
1 of the 6 most-reported categories on this page are backed by a recall or open investigation; the other 5 rest on owner reports alone.
Recalled = an NHTSA safety recall covers this category, so a free repair exists. Under investigation = NHTSA has an open probe but no recall yet. Investigation closed = NHTSA examined it and closed the probe — this is not a defect finding; where a closed probe led to a recall we name the campaign. Not available = recall or investigation data could not be confirmed for this vehicle — it is not a “no”. Categories are matched by NHTSA's top-level component. Check your VIN at nhtsa.gov/recalls.
Percentages are the share of the 998 complaints citing each component; one complaint can cite several components. “Unspecified / other” is NHTSA’s own catch-all category — we show it rather than hide it.
Recalls — 4 campaigns
Fuel System, Gasoline:delivery:hoses, Lines/piping, And Fittings
An engine compartment fire while parked or driving can increase the risk of injury. Recall repairs are free at authorized dealers.
PARK-IT: NO · Park outside · OVER-THE-AIR FIX: NO
What owners report
“THE CONTACT OWNS A 2015 KIA OPTIMA. THE CONTACT STATED THAT WHILE DRIVING APPROXIMATELY 45 MPH, THE VEHICLE STALLED. THE CONTACT COASTED TO THE SHOULDER…”NHTSA complaint 11143999 — filed 10/30/2018 · ENGINE
“I NOTICED THAT WHILE DRIVING MY CAR IT WOULD FIRST MAKE A NOISE AND THEN RIGHT AFTER IT WOULD STALL AND SPUTTER/ JERKING LIKE IT…”NHTSA complaint 11143056 — filed 10/26/2018 · ENGINE
“RELOCATING TO LAS VEGAS AND MY ENGINE WENT OUT. THE CAR JUST STOP MOVING. I BOUGHT THIS CAR 13 MONTHS AGO AT PAUL BLANCO STOCKTON…”NHTSA complaint 11142151 — filed 10/23/2018 · ENGINE
Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.
Complaint trend by year filed
Frequently asked questions
What are the most common problems with the 2015 Kia Optima?
Engine issues are the most-reported category, cited in 617 of 998 NHTSA complaints (61.8%), followed by unspecified/other issues (138), electrical system (126), structure:body (75). Complaints are unverified owner reports.
How many complaints does the 2015 Kia Optima have?
998 complaints were on file with NHTSA as of 07/12/2026. Of those, 31 involved a crash, 71 involved a fire, and 23 reported injuries. 1 deaths were reported.
Does the 2015 Kia Optima have any recalls?
Yes — 4 NHTSA safety recall campaigns, including campaign 18V907000. Recall repairs are free at authorized dealers. Check your specific vehicle by VIN at nhtsa.gov/recalls.
Has NHTSA acted on the 2015 Kia Optima's reported problems?
1 of the 6 most-reported complaint categories on this page is backed by an NHTSA safety recall or open investigation; the rest are unverified owner reports. A recall means a free repair is available at authorized dealers.
Is a complaint proof of a defect?
No. Complaints are reports submitted by consumers to NHTSA. NHTSA does not verify individual complaints, and a complaint is not proof that a defect exists.
About this data — Complaint figures on this page are consumer reports submitted to the National Highway Traffic Safety Administration (NHTSA), a U.S. government agency. NHTSA does not verify individual complaints; a complaint is not proof that a defect exists, and counts reflect what owners chose to report, not confirmed failure rates. Recall information comes from official NHTSA safety recall campaigns; recall repairs are free at authorized dealers. Always check your specific vehicle by VIN at nhtsa.gov/recalls. CarModelProblems.com is an independent site and is not affiliated with NHTSA or any vehicle manufacturer. Data through 07/12/2026.
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