2015 Kia Optima service brakes, hydraulic problems
40 owner complaints filed with NHTSA name the service brakes, hydraulic on the 2015 Kia Optima — 4% of all complaints for this model year.
What owners report
“The contact owns a 2015 Kia Optima. The contact received notification of NHTSA Campaign Number: 21V331000 (Service Brakes, Hydraulic); however, the part to do the recall repair was unavailable. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair…”
filed Jun 5, 2026
“The contact owns a 2015 Kia Optima. The contact stated that while driving at an undisclosed speed, the brake pedal became inoperable. The contact stated that while attempting to depress the brake pedal, the brake pedal failed to operate properly. However, while light pressure was applied to the…”
filed Apr 16, 2026
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related recalls
- Hydraulic Electronic Control Unit (HECU) may experience an electrical short, which can…Campaign 23V652000 · Sep 25, 2023
- Brake fluid may leak inside the Hydraulic Electronic Control Unit (HECU), possibly…Campaign 21V331000 · May 10, 2021
- Brake fluid may leak inside the Hydraulic Electronic Control Unit (HECU), possibly…Campaign 20V519000 · Aug 27, 2020
Service Brakes, Hydraulic problems in other Optima years
| Year | Reports | Share |
|---|---|---|
| 2019 Optima | 1 | 0% |
| 2016 Optima | 2 | 0% |
| 2014 Optima | 16 | 3% |
| 2013 Optima | 52 | 4% |
| 2012 Optima | 35 | 4% |
| 2011 Optima | 21 | 4% |
| 2009 Optima | 4 | 3% |
| 2008 Optima | 4 | 3% |
| 2007 Optima | 2 | 1% |
| 2005 Optima | 2 | 1% |
| 2004 Optima | 5 | 2% |
| 2003 Optima | 3 | 2% |
Other reported problem areas on the 2015 Kia Optima
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.