Is the 2015 Kia Optima a bad year?
1,011 owner complaints to NHTSA. Engine complaints: 648, 50× a quiet Optima year.
Consider selling
Half of all engine complaints about the 2015 Kia Optima were filed between 64k and 115k miles. You're at 89,000 miles.
The verdict moves with mileage: the same car reads differently at 30,000 and at 150,000 miles.
What 2015 Optima owners report, by mileage
Each system owners named in five or more complaints, with the mileage range where the middle half of those complaints were filed. Read at 89,000 miles.
| SYSTEM | COMPLAINTS | MIDDLE HALF FILED AT | TYPICAL US REPAIR BILLS |
|---|---|---|---|
| EngineSTANDS OUT | 648 (64%) | 64k–115k miles · around this mileage | Valve cover gasket replacement $110–$500 · Timing chain replacement $1,000–$4,000 |
| Electrical system | 135 (13%) | 55k–101k miles · around this mileage | 12-volt battery replacement $100–$400 · Starter motor replacement $350–$1,200 |
| Brakes | 90 (9%) | 59k–129k miles · around this mileage | Brake pad replacement (one axle) $115–$390 · Brake pads and rotors replacement (one axle) $200–$1,084 |
| Fuel system | 56 (6%) | 85k–130k miles · around this mileage | Fuel pump replacement $220–$1,500 · Fuel injector replacement (one injector) $300–$1,200 |
| Transmission and drivetrain | 49 (5%) | 64k–95k miles · around this mileage | CV axle / CV joint replacement (one side) $300–$1,500 · Automatic transmission replacement $2,500–$7,000 |
| Speed control | 36 (4%) | 38k–102k miles · around this mileage | — |
| Stability control | 10 (1%) | 52k–92k miles · around this mileage | — |
| Body structureSTANDS OUT | 76 (8%) | 40k–70k miles · mostly behind | — |
| Steering | 69 (7%) | 16k–77k miles · mostly behind | — |
| Air bags | 26 (3%) | 34k–68k miles · mostly behind | — |
| Exterior lighting | 23 (2%) | 38k–74k miles · mostly behind | — |
| Visibility and wipers | 9 (1%) | 26k–82k miles · mostly behind | — |
| Collision avoidance | 9 (1%) | too few with a mileage | — |
| Suspension | 6 (1%) | too few with a mileage | — |
Bills are typical US ranges from the sources named in the tool (J.D. Power, Kelley Blue Book, CarParts.com and others), printed only for systems that stand out or sit at or ahead of 89,000 miles. Not a quote.
What owners reported alongside their complaints
Of 1,011 complaints: 31 mention a crash · 74 mention a fire · 20 report an injury · 141 say the car was towed.
65 complaints were filed in the last 12 months, the newest in Nov 2026.
Counts of what owners wrote in their complaints, not verified by anyone.
In owners' own words
Your sitting at a red light or driving down the road, and the car just stalls/turns off without any warning what so ever.
My son was driving the car , when he had to pull over and realize the smoke coming from the hood. When he opened the hood the engine was on fire.
My engine shut off while driving down a state highway, going about 70. I was able to roll down to an exit and park on the side of the exit.
Unedited excerpts from complaints filed with NHTSA, chosen by mileage (nearest 89,000 miles), not by content. Unverified.
Recalls for the 2015 Kia Optima: 4
The Hydraulic Electronic Control Unit (HECU) may experience an electrical short, which can result in an engine compartment fire while parked or driving. An engine compartment fire while parked or driving can increase the risk of injury.
Brake fluid may leak inside the Hydraulic Electronic Control Unit (HECU), possibly resulting in an electrical short. An electrical short in the HECU increases the risk of a fire while parked or driving.
Brake fluid may leak inside the Hydraulic Electronic Control Unit (HECU), possibly resulting in an electrical short. If the HECU short circuits, there is an increased risk of an engine compartment fire.
The high pressure fuel pipe that connects to the fuel pump outlet may have been damaged, misaligned or improperly torqued during the engine replacement procedure, possibly causing a fuel leak. A fuel leak in the presence of an ignition source can increase the risk of a fire.
A recall may cover only some cars of a model year; the campaign size counts every model and year it lists. Enter your VIN at nhtsa.gov/recalls: dealers fix open recalls free.
Service bulletins from Kia: 138
Repair instructions Kia sent its dealers for symptoms seen in the shop on the 2015 Kia Optima. Ask a dealer or mechanic for a bulletin by its number.
Product improvement campaign: engine replacement instructions for DTC P1326 (PI1802Y/Z)
Injector harness routing for PI1802Y/Z and PI1803Y/Z engine replacements
TSB_PI1802_R2 Knock Sensor Detection System ECU Logic Improvement
Auxiliary canister installation and EVAP leakage test (SC189)
NHTSA defect investigations: 4
Hyundai and Kia ABS Module Fires
Loss of Motive Power
Throttle control system vulnerabilities
Electrical overstress
Neighbouring years
2014 Optima: 591 complaints, consider selling · 2016 Optima: 761 complaints, consider selling.
Every Kia Optima year
2001 · 2002 · 2003 · 2004 · 2005 · 2006 · 2007 · 2008 · 2009 · 2010 · 2011 · 2012 · 2013 · 2014 · 2015 · 2016 · 2017 · 2018 · 2019 · 2020 · All Optima years side by side
Other Kia models: Kia Amanti · Kia Cadenza · Kia Carnival · Kia EV6 · Kia EV9 · Kia Forte · Kia K5 · Kia Niro · Kia Optima Hybrid · Kia Rio · Kia Rondo · Kia Sedona · Kia Seltos · Kia Sephia · Kia Sorento · Kia Soul · Kia Spectra · Kia Sportage · Kia Stinger · Kia Telluride. All makes and models.
Questions
Is the 2015 Kia Optima a bad year?
1,011 owner complaints to NHTSA. Engine complaints: 648, 50× a quiet Optima year. At 89,000 miles the tool says: Consider selling. Half of all engine complaints about the 2015 Kia Optima were filed between 64k and 115k miles. You're at 89,000 miles.
What are the most common problems with the 2015 Kia Optima?
By owner complaints to NHTSA: engine (648), electrical system (135), brakes (90), fuel system (56), transmission and drivetrain (49). Half of the engine complaints were filed between 64k–115k miles.
How many recalls does the 2015 Kia Optima have?
4 recall campaigns list this model year: Brakes (NHTSA 23V-652), Brakes (NHTSA 21V-331), Brakes (NHTSA 20V-519), Fuel system (NHTSA 18V-907). A recall may cover only some cars; check by VIN at nhtsa.gov/recalls.
Method: counts of unverified owner complaints filed with NHTSA, compared only with other years of the same model (sales volumes are unknown, so no failure rate is computed). A system stands out at 40+ complaints and at least twice the model's quiet (lower-quartile) year, or twice the share across every vehicle of that model year. The mileage range is the 25th to 75th percentile of the mileages owners reported. Data received by NHTSA through November 5, 2026. Repair prices are typical US ranges from named sources, not quotes. Not a diagnosis and not financial advice. PulsCar is not affiliated with NHTSA. Check this car at your own mileage.