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2017 Kia Optima problems

A 2017 Kia Optima is now 9 years old, so an average example has covered around 121,500 miles. An early car in the generation · most of the launch teething issues were still being worked through, so recall completion and dealer rectification history matter. Check the state safety inspection and service history alongside the documented faults below, which are sorted by whether a 2017 car has usually reached the mileage where they appear.

Compiled & reviewed by the VehicleFaults Research Team

Quick answer

The 2017 Kia Optima is 9 years old, so an average example has covered roughly 121,500 miles. At that mileage 5 of the documented faults are already due, so check those first.

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Faults a 2017 example has usually reached

Documented onset mileage is at or below the ~122k miles an average 2017 car has covered.

EngineCritical

Theta II 2.0T/2.4L engine failure (bearing/knock) — recalls and warranty extensions apply.

Typically appears
60,000+ miles
What to inspect
Listen for knock; confirm the knock-sensor recall and any engine replacement.
EngineHigh

Excessive oil consumption.

Typically appears
70,000+ miles
What to inspect
Check oil level and history.
SteeringMedium

Clunking or clicking noise from the steering column due to a worn EPS flexible coupling.

Typically appears
50,000-70,000 miles
What to inspect
With the engine running and the vehicle stationary, rapidly rock the steering wheel left and right. Listen for a distinct plastic or metallic clunk from behind the dashboard.
BrakesMedium

Electronic Parking Brake (EPB) failing to release fully, leading to binding rear brake calipers.

Typically appears
40,000-80,000 miles
What to inspect
Engage and disengage the EPB switch multiple times. Listen for groaning from the rear wheels and ensure the car rolls freely in neutral without rear-end drag.
EngineMedium

Hesitation or stuttering under light acceleration caused by soot build-up in the EGR valve on 1.7 CRDi models.

Typically appears
60,000-100,000 miles
What to inspect
Hold the engine revs steadily at 1,500-2,000 rpm whilst stationary. Feel for misfires or rough running, and check the instrument cluster for an illuminated EML.

Faults that appear at any mileage

Age, electronics and build-related issues that are not mileage-driven.

ElectricalLow

Infotainment and sensor glitches.

Typically appears
Any
What to inspect
Test the screen and features.
TransmissionLow

Occasional harsh shifts.

Typically appears
Any
What to inspect
Test-drive for smooth engagement.
ExteriorLow

LED Daytime Running Lights (DRL) flickering, dimming, or failing completely, requiring a costly headlight unit replacement.

Typically appears
4-6 years
What to inspect
Turn on the ignition and headlights. Visually inspect both front DRL strips for any flickering, dim patches, or completely dead LED sections.

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Turn this car's known weak points into a step-by-step viewing plan · what to inspect, what a bad result means and what to ask the seller.

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Kia Optima · frequently asked questions

Do Kia Optima engines fail?

The Theta II engines have a documented failure history with recalls — verify the knock-sensor update and any engine replacement.

Is the Optima a good used buy?

Strong value if recall history is confirmed and oil use is clean.

What's the knock-sensor recall?

A detection system added to catch bearing wear early — confirm it was installed.

Are there common issues with the Optima PHEV charging system?

The Plug-in Hybrid (PHEV) variant is generally reliable, but the onboard charger (OBC) can occasionally fail, preventing the high-voltage battery from accepting a charge. Dealers should always test the Type 2 charging cable on the forecourt to ensure the charging indicator illuminates and the dashboard confirms active charging.

Does the 1.7 CRDi engine use a timing belt or chain, and when does it need replacing?

The 1.7-litre CRDi diesel engine utilises a timing chain rather than a rubber belt. While designed to last the lifetime of the vehicle, poor servicing can lead to chain stretch or tensioner failure. Listen for a distinct metallic rattle from the engine bay during a cold start to identify wear.

What should I look out for on the 7-speed DCT automatic gearbox?

The 7-speed dual-clutch transmission, paired mostly with the 1.7 CRDi, can suffer from premature clutch pack wear. During a test drive, check for excessive juddering when pulling away from a standstill or hesitation when shifting between first and second gear. Routine fluid changes are critical to maintain clutch longevity.

Other Optima model years

202020192016

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