2013 Kia Optima: engine knocking or ticking

Filed Oct 22, 2026 · Engine · 125,055 miles · FL

The contact owns a 2013 Kia Optima. While driving at 65 MPH, the vehicle lost motive power but continued to drive under reduced power, with the check engine warning light illuminated. The failure nearly caused a crash. The vehicle was taken to O'Reilly's, where three knock sensor codes were retrieved. The vehicle was then taken to the dealer and was repaired under the federal safety agency Campaign Numbers: 23V652000 (Service Brake, Hydraulic), 22V093000 (Fuel System, Gasoline), and 22V560000 (Structure). The manufacturer was notified of the failure by phone. The failure mileage was approximately 125,055.

Filed May 8, 2026 · Airbags, Engine · MD

The vehicle is experiencing sudden engine stalling while in motion, a known safety hazard. Despite a documented maintenance history with no issues, the dealer (Bayside Kia) is attempting to deny a Theta II Settlement claim by shifting the narrative to 'engine sludge,' which only appeared as a symptom in June 2025( Walmart oil change) alongside engine performance issues. The vehicle has active codes P0014 and P0017, which are secondary symptoms of the internal bearing wear and metallic debris contaminating the oiling system. KDS Diagnostic tests showed Cylinder 1 at 0.16mm (approaching the 0.20mm failure limit). This clearance proves the connecting rod bearings are worn and reaching the failure threshold; this mechanical wear is the root cause of the engine's inability to operate safely. The presence of metallic debris in the oil is the definitive signature of the Theta II manufacturing defect. Furthermore, the dealer acted in bad faith by attempting to charge for Airbag repairs (Codes B1346/B1481) that are covered under the 15-year Clock Spring Warranty Extension (CS1102). The dealer has dismissed my qualifying maintenance documents, claiming they are 'not official,' which is a direct violation of the Magnuson-Moss Warranty Act. A manufacturer cannot deny a warranty claim because services were performed at third-party facilities, nor can they deny a claim without proving 'exceptional neglect.' I am reporting a refusal to honor a court-ordered safety settlement and an attempt to return an unsafe, stalling vehicle to the road.There is no evidence of engine abandonment or exceptional neglect. I’m considered "in compliance" if I can show I didn't go more than 14 months without servicing or a certain mileage between oil changes.The dealer's dismissal of verified third-party receipts and bank statements is a bad-faith attempt to ignore an inherent manufacturing defect documented by a 0.16mm BCT result and metallic debris.

Filed Apr 29, 2026 · Engine · 297,000 miles · CA

The contact owns a 2013 Kia Optima. The contact stated while driving 75 MPH, the vehicle went into LIMP Mode and failed to exceed 60 MPH. The check engine warning light was illuminated. The vehicle was taken to the dealer, where it was diagnosed and determined that the knock sensor and the harness had failed and needed to be replaced. The vehicle was repaired; however, the failure recurred on several occasions, and the vehicle was driven or towed to the dealer as needed. The dealer cleared the diagnostic trouble codes and informed the contact that a recall repair would not be completed unless the engine made loud knocking sounds or seized. The contact stated that while driving at an undisclosed speed, the engine made an abnormally loud sound and seized. The vehicle was towed to the residence. The vehicle was then towed to the dealer, where the contact was informed that the engine was not eligible for replacement due to a lack of maintenance records because the contact did not have all the oil change service records available. The manufacturer was notified of the failure, but no assistance was provided. The failure mileage was approximately 297,000.

Filed Apr 21, 2026 · Engine · 163,814 miles · LA

The contact owns a 2013 Kia Optima. The contact stated that while driving approximately 35-40 MPH, the vehicle started shuddering with a knocking sound coming from the engine. The check engine warning light was illuminated. The vehicle was taken to the local dealer, and the dealer declined to repair the vehicle under the federal safety agency Campaign Number: 17V224000 (Engine and Engine Cooling). The dealer stated that the vehicle had a branded title. The vehicle was not diagnosed or repaired. The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 163,814.

Filed Mar 12, 2026 · Brakes, Electrical · 111,862 miles · TX

The contact owns a 2013 Kia Optima. The contact stated that while driving 75 MPH, the vehicle lost motive power. The accelerator pedal was depressed; however, the vehicle eventually stalled on the side of the road. The key, battery, oil, and engine warning lights were illuminated. There was an abnormal ticking sound coming from the vehicle. The contact stated the failure was related to the federal safety agency Campaign Number: 23V652000 (Service Brakes, Hydraulic). The vehicle was towed to an independent mechanic, where it was determined that the engine had seized. The engine failed to turn over. The mechanic had previously performed a routine oil change. The vehicle was towed to the local dealer, where it was diagnosed with low voltage. The spark plugs were checked, there were no oil leaks, and the vehicle was diagnosed with catastrophic engine failure. The vehicle was not repaired. The manufacturer was contacted, but no assistance was provided. The failure mileage was approximately 111,862.

Filed Mar 3, 2026 · Engine · 211,000 miles · WI

The contact owns a 2013 Kia Optima. The contact stated that while driving at various speeds, there was a knocking sound coming from the engine, and the vehicle failed to properly accelerate. While the contact’s wife was driving approximately 60 MPH, the vehicle stalled. The vehicle was later towed to the local dealer, who discovered metal shavings inside the engine oil and informed the contact that the engine was faulty and needed to be replaced. The vehicle was not repaired. The manufacturer was notified of the failure, but no assistance was provided. The contact was informed that the VIN was not included in the federal safety agency Campaign Number: 17V224000 (ENGINE AND ENGINE COOLING). The contact stated that the vehicle had experienced the failure listed in the recall. The failure mileage was 211,000.

Filed Mar 2, 2026 · Engine · 200,776 miles · WI

The contact owns a 2013 Kia Optima. The contact stated that while his wife was driving approximately 55 MPH, the vehicle stalled but restarted. The check engine warning light was illuminated. The contact stated that the failure was related to TSB: PI2002 / PI2002A. The contact discovered there was an issue with the damage to the connecting rod bearing. The vehicle was taken to an independent mechanic who determined that the battery needed to be replaced. There was an abnormal sound when the vehicle was started. The contact stated that there were metal shavings in the oil and the control valve. The vehicle was towed to the local dealer, where a broken valve and lifter were found, and the dealer determined that the engine needed to be disassembled. The dealer stated that there were metal shavings in the oil and the control valve. The vehicle was not repaired. The manufacturer was contacted and confirmed that there was no repair under recall for the failure. Additionally, the manufacturer requested the oil change records. The failure mileage was approximately 200,776.

Filed Jan 7, 2026 · Engine · 88,000 miles · NY

The contact owns a 2013 Kia Optima. The contact stated that while driving approximately 30–35 MPH, the engine started knocking. The check engine warning light illuminated once the knock started in the engine. The vehicle was not repaired. The vehicle was driven to the dealer. The contact stated that there was an open recall associated with the VIN; however, the dealer declined to repair the vehicle because the engine was knocking. The manufacturer was made aware of the failure. The failure mileage was approximately 88,000.

Filed Jan 7, 2026 · Engine · CA

My 2013 Kia Optima SXL experienced engine knock and shutdown after completion of recall SC147 (KSDS software update). The recall did not repair the known Theta II rod bearing defect and now the engine is failing as detected by the software. Kia corporate and Kia of Merced (Merced, CA) are refusing repair, citing auction purchase and PI1803, despite the engine being covered under the Theta II engine warranty extension. The vehicle is unsafe to operate and shuts down unexpectedly.

Filed Jan 5, 2026 · Engine, Fuel system · NM

The engine began exhibiting symptoms consistent with the known bearing wear defect covered under the manufacturer’s safety recall, including knocking noises, loss of power, and engine malfunction. The condition worsened to the point that the vehicle became unsafe to operate due to the risk of engine seizure and sudden loss of propulsion while driving. The vehicle was inspected by a Kia dealership, which confirmed engine damage consistent with the recall defect. The engine remains available for inspection. Despite an active, unrepaired safety recall for engine bearing wear that increases the risk of engine seizure and crash, the manufacturer and dealership have refused to perform the recall remedy unless the owner first replaces the engine at personal expense. The manufacturer has stated that the recall cannot be performed due to the current condition of the engine. This refusal leaves the vehicle with an open safety recall and no manufacturer-provided remedy, creating an ongoing safety risk due to potential engine seizure and loss of power while driving.

Filed Nov 20, 2025 · Body, Electrical · FL

The computer modular or engine control module yes, it is available for inspection. I can be at risk because my lights flicker off and, on my turn, signals do not work, and it will not go into drive I have to start my car 30 minutes before I can leave for work at 5:30am in the morning. I had a security update on my car and ever since that took place, I had this issue. I just had the P1326 code come up on my car last November took it to Vero Beach Kia and had that update done on my car for the engine problems that is going on, and they replaced the last recall which was the knock sensor. I had explained to them the issue my car does when starting it they told me it has nothing to do with the update that would cause it. When looking this issue up there are other people having the same issue, but Kia will not inspect it out so can you please investigate this issue and plus the paint on my car has peeled so bad.

Filed Oct 21, 2025 · Engine, Transmission · CA

I have had 2 incidents of engine ceasure in my 2013 Kia Optima SX w/ Limited package. Once it ceased on the freeway causing me to have a minor collision with the offramp guide rail and just recenting on 10/18/2025 it happened again on the 405 with loud knocking sounds engine light flashing and no real engine power after ceasing. My engine was previously repaired under warranty with case number XXX which should have extended the warranty along with the existing recall for the GDI engine. I need help to get KIA to repair/replace under warranty as my engine is covered in the Theta II class action settlement. Kia repeatedly tries to dodge responsibility for repairing my car under warranty. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)