Buyer Research

2017 Kia Optima — Should You Buy One?

Typical asking price: $9,000–$13,000. There is 1 high-severity known issue you need to know before handing over a check.

Deciding between model years? Compare the 10 Kia Optima years we've written up →

Kestrel Take

Second year of the JF Optima and two thirds of its record is still the engine — the 2.4L Theta II knocking, drinking oil and seizing, with eight fires. The knock-sensor campaign and the settlement's lifetime engine warranty cover this year as they do the 2015. The 1.6T and 2.0T have their own histories but not this one. An honest 2017 Optima is a good car; the paperwork tells you if it is honest.

What we checked

Reconciled against public records, 2026-09-25

NHTSA holds 255 owner complaints for the 2017 Kia Optima, and 3 recall campaigns.

A big number here usually means a lot of these were sold, not that it is a bad vehicle — popular models collect more complaints for the same rate of trouble. So the total on its own says little. What is worth reading is the shape of it. 67% of them are about one thing — the engine. That much concentration is a genuine pattern rather than background noise, and it is the first thing to check on any example you look at.

3 recall campaigns cover this model year. Recalls are repaired free, for any owner, with no time limit on most safety campaigns — but only if someone books it in. Ask the seller to show it was done, or have any dealer check the VIN; it takes them a couple of minutes and costs nothing.

Counts come from the NHTSA complaint and recall database — free, public, and worth checking yourself.

Known Issues for the 2017 Kia Optima

Ranked by wallet impact. These are documented, recurring problems — not freak accidents. How we decide that.

Theta II 2.4L — oil consumption, knock, seizure at highway speedHigh — wallet impact

171 complaints, 67% of the record, 8 fires. The sequence in the complaints: needing oil between changes, then a leak, then a knock at speed and a seized engine within seconds, at 100,000–120,000 miles. Kia's knock-sensor campaign (KSDS) and the class-action lifetime Theta II warranty apply where the campaign was installed. Recall 18V907 covers fuel-line leaks on cars that already had an engine swapped. Ask for the campaign history and check the oil.

Repair cost (estimate): $0 under the extended engine warranty if the knock-sensor campaign is on record; $5,000–$7,500 otherwise — around 68% of what this car is typically worth

Source: NHTSA complaints filed under the engine (171), the fuel system (22).

Oil pressure switch leaks onto the harness; theft without an immobiliser; Hybrid wiring corrosionMedium

The 2.4L's oil pressure switch weeps oil into the wiring; the base-key car is a USB-cable theft target (Kia offers a free anti-theft update); and the Optima Hybrid's fuel-pump harness has been found corroded with its protective cover missing. Three unrelated faults under one heading.

Repair cost (estimate): $100–$500

Source: NHTSA complaints filed under electrics and electronics (25).

Hybrid voltage protection device (recall) and trunk latch (recall)Low

Recall 18V161: the Optima Hybrid's voltage protection device can trip and shut the car down — a free replacement. Recall 23V594: the trunk latch base can crack. Both free.

Repair cost: $0 with the recall — verify it was performed

Source: 3 NHTSA recall campaigns on this model year.

Walk-Away Red Flags

✗Oil on the dipstick below the mark, or a seller who carries a quart in the trunk
✗Knock at any RPM
✗No knock-sensor campaign on record
✗Oil residue around the oil pressure switch

Good Signs

✓Kia-installed replacement engine with paperwork
✓Knock-sensor campaign on record
✓All three recalls closed
✓A 2.0T SX or a 1.6T — different engine families