2011 Kia Optima Engine Problems

NHTSA component category: ENGINE · data through 07/12/2026

253Engine complaints

43%Of all 589 complaints

#1Most-reported category

Source: U.S. NHTSA complaint data. Complaints are unverified reports from vehicle owners — a complaint is not a confirmed defect.

How engine ranks on this vehicle

ENGINE253 · 43%

STEERING99 · 16.8%

EXTERIOR LIGHTING82 · 13.9%

ELECTRICAL SYSTEM61 · 10.4%

Unspecified / other38 · 6.5%

Share of the 589 complaints citing each category; one complaint can cite several. Full breakdown on the 2011 Kia Optima overview page.

What owners report

“MY MOTOR BLEW AT 102K MILES WITH NO WARNING. THERE WERE NO SIGNS OF LOSING POWER, NO KNOCKING, THE OIL WAS FULL.... THE CAR STALLED…”NHTSA complaint 10817451 — filed 01/03/2016

“LEFT A STOP LIGHT AND CAR HESITATED SO I GAVE IT A LITTLE MORE GAS. THEN THERE WAS LOUD METAL TO METAL NOISE FROM ENGINE…”NHTSA complaint 10787041 — filed 10/29/2015

“I WAS DRIVING AT 40 MPH WHEN SUDDENLY THE ENGINE SHUT OFF. I LOST ALL BRAKES AND STEERING AND LUCKILY WAS ABLE TO COAST TO…”NHTSA complaint 10786217 — filed 10/27/2015

Excerpts are shortened and scrubbed of personal details; they are individual, unverified reports.

Engine complaints by year filed

Frequently asked questions

Does the 2011 Kia Optima have engine problems?

Engine is the most-reported problem area on the 2011 Kia Optima: 253 of 589 complaints on file (43%). Complaints are unverified owner reports, not confirmed defects.

How many complaints does the 2011 Kia Optima have in total?

589 complaints were on file with NHTSA as of 07/12/2026. Across all categories, 23 involved a crash, 32 involved a fire, 19 reported injuries, and 1 reported deaths.

What does NHTSA's engine category include?

NHTSA assigns each complaint to standard component categories; this page reports the ENGINE category exactly as NHTSA defines and records it.

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.