There are 2 stored owner reports matching the suspension leading-label group for the 2017 Kia Optima in our NHTSA-sourced dataset. These are unverified consumer reports and may not reflect confirmed defects.
This group counts stored reports whose component label starts with one of this site's matching prefixes, ignoring case. Each matching report counts once within the group. Components mentioned later in the label or only in the narrative are not searched. How component counts work
Loaded 2 of 2 matching reports.
Open the full vehicle complaint log (all categories)My car is consuming major oil. I am having to put at minimum 3 to 4 quarts of oil every 3 days. I am having major loss of power. My car has oil fouled far too many spark plugs. In the last 3 months, I have had to replace the spark plugs three separate times. Within the last 3 weeks I have replaced the following: 1. Ignition Coils 2. Valve Cover Gasket 3. PCV Valve 4. 2 separate sets of spark plugs and 1 singular spark plug for Cylinder #4. My car is having a major oil consumption problem and the performance has been severely affected.
POWER TRAIN; SHIFT LOCK SPECIFICALLY: HAD TO USE THE RELEASE CONTROL MORE THAN ONCE. WHILE DRIVING WHEN IT HAPPENS, I FEEL A SURGE/ DECLINE IN ACCELERATION(SOMETHING I REQUESTED BE CHECKED A YEAR AND A HALF AGO, BUT KIA SAID THEY COULD NOT RECREATE MY DESCRIPTION).CONTINUES TO DRIVE BUT SLUGGISH TO ACCELERATE. ONCE I PUT INTO "PARK" I CANNOT GET IT OUT OF PARK EXCEPT TO USE RELEASE. IT DID RESET(?) WHEN I TURNED THE CAR OFF. SUSPENSION; FIRST FEW MONTHS OF OWNING THE CAR I PERIODICALLY HEARD A CREAK IN REAR SUSPENSION HERE AND THERE WHEN BACKING OUT OF DRIVEWAY/GUTTER SLOPE. HAVE NOTICED AN INCREASED CREAKING AND MORE BOUNCE WHILE DRIVING OVER TIME BUT HAVE NOT EVEN OWNED CAR MORE THAN 2 YEARS.
Complaints are unverified consumer reports submitted to NHTSA. A high complaint count may reflect vehicle popularity, not defect severity. Data sourced from NHTSA public records.
NHTSA source checks for this vehicle year
Checks are recorded separately for each dataset, not for the whole page. Dates use UTC. A missing check date does not mean no records exist.
Vehicle import recorded: Apr 28, 2026. This is the stored import date, not confirmation that every source was successfully refreshed.