2017 Kia Optima · symptom sheet
Engine failure, knocking or rod bearing
- 72owner reports
- 68,000median miles
- $12,000median quote
- 0involved a crash
Newest report Aug 24, 2026 · checked Oct 2, 2026
168 of the 256 complaints on this car are about the engine. 72 of those describe engine failure, which makes it the most reported problem on the 2017 Optima.
Narrower sheets: Engine knocking or ticking (40 reports)
Tick what matches of 72 reports
Engine failure on other Optima years
Report counts are for each model year on its own, so a newer car has had less time to collect them.
What this problem usually is
These are the reports nobody wants to file. The engine started knocking or ticking, the oil light came on, and then it seized or had to be replaced. Some owners had the replacement covered under warranty or an extension, and plenty were told they'd pay. Several narrower sheets split this group into knocking, seized engines and rod bearing failure.
What got replaced
Owners who name the part that was replaced mention the engine (66 reports).
Recalls and investigations
No recall on the engine covers the 2017 model year as of Oct 2, 2026.
NHTSA investigations into the engine on the Optima
Loss of motive power. Closed dec 12, 2023.
Engine fires. Closed feb 5, 2024, led to recall 23V-877.
Scope and timeliness. Closed dec 22, 2021, led to recall 17V-224.
What owners paid
10 of the 72 reports quote a price. Each dot is one quote. The middle half runs $3,300 to $13,000.
When it happens
The middle half of failures fell between 30,000 and 98,000 miles, from the 37 reports that gave a mileage.
Is this a known problem?
The manufacturer has sent NHTSA 19 service bulletins or notices for the 2017 Kia Optima that deal with this problem. Newest first.
Federal rules make a manufacturer send NHTSA a copy of any notice about a defect that goes to more than one dealer or owner. Most of these are service bulletins, the repair instructions manufacturers send to dealers. NHTSA generally leaves safety recall bulletins out of this file, and recalls are listed separately.
PRODUCT IMPROVEMENT CAMPAIGN: ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI1802Y/Z) This bulletin provides information related to the Technical Service Bulletin previously published PI1802 titled "Knock Sensor Detection System - ECU Logic Improvement"; equipped w/THETA II engine.
PITSTOP: INJECTOR HARNESS ROUTING FOR PI1802Y/Z AND PI1803Y/Z ENGINE REPLACEMENTS This bulletin provides information to address a no-start or hard start with poor running condition after engine replacement under PI1802Y/Z or PI1803Y/Z. Some replacement long blocks may come with pre-installed fuel rail, injectors, and injector wiring ...
ENGINE REPLACEMENT INSTRUCTIONS FOR DTC P1326 (PI1802Y/Z) This bulletin provides information related to the Technical Service Bulletin previously published PI1802 titled "Knock Sensor Detection System - ECU Logic Improvement" equipped w/THETA II engine.
PRODUCT IMPROVEMENT TSB_PI1802_R2 - Knock Sensor Detection System - ECU Logic Improvement - This bulletin provides information related to a software update to the Engine Control Unit (ECU) to install the Knock Sensor Detection System (KSDS) in order to protect the engine from ...
15 more on the 2017 Kia Optima page.
What owners wrote
“The vehicle is consuming excessive amounts of oil. The dipstick was completely dry before 5000 miles were up. I had to add some oil to the engine to avoid engine failure. I have reported this to Jim Ellis dealership in Kennesaw GA but I was told to drive the vehicle until it knocks or the knock sensor goes.”
Filed Jan 16, 2026 · 5,000 miles
“Engine is burning 2 QT of oil every month and burning it in under 1000 miles. Kia dealership says it's a common issue but can't help me until the engine seizes up. The car has less than 85k miles on it. How can this be a common issue but they can't fix it till the engine dies? What if the engine dies out of warranty? Then I'm out 12k for a new engine that will die in 80k miles. This should be a recall.”
Filed Sep 18, 2024 · 1,000 miles
“I was driving on the highway, and my oil pan storage plug fell out of my car. All of the oil leaked out of the engine causing my engine to seize up while I was driving. The dealership says my vehicle is out of warranty, and will not replace it, and that it will cost me $12,000 for a new engine”
Filed May 22, 2024
“Engine needed to be replaced as part of the recall for knock, however they said because the repair was done on a subsequent work order and the first one was for a failed AEB module that none of the repairs are covered. I'm out over $13,000 for what should have been warrantied”
Filed Sep 21, 2023
Should you keep driving it?
This page can't tell you that. 0 of 72 reports involved a crash. Owners who file are the ones who had a bad experience, and nobody checks their reports. If the problem affects steering, braking, power or a fire risk, treat it as a safety fault and have it inspected before a long or high-speed drive.
File your own report with NHTSA. Complaint counts are how a problem gets an investigation. How reports land on this sheet.
Guide Taking it to a shop? How to describe this problem so it gets found
Other problems on this car
- Check engine light or misfire 49 reports
- Engine stalls or loses power while driving 47 reports
- Burns oil or oil level rises 43 reports