KIA Complaints

After driving the Kia sorento and parking it for a little bit then restarting it again the transmission jerks very hard at times and sometimes it’s moderate. Its an on going issue. It starts happening after the car is being driven but on a cold start like overnight while its parked and the next day you turn the car on you dont feel anything until you start driving it then parking it and turn it off to go inside the store or something and once you come back out to start it you will feel it. My car only has 45K miles on it.

Red oil light came on along with check engine light took to shop got oil change and they test pressure all is good but oil light and engine light still on replaced oil pressure sensor switch and variable valve solenoid lights still on took to kia dealership they said say thing as first shop replaced oil pressure sensor switch again because they said the aftermarket one doesn't work on my car so bought part from dealer changed it light still on.

While driving, the vehicle suddenly developed a loud knocking noise from the engine. Within one block the vehicle began smoking heavily from under the hood. I pulled over, opened the hood, and flames were visible. This is a 2016 Kia Optima with the 2.4L Theta II engine. Approximately one year ago the original engine seized and was replaced by a Kia dealer under the Theta II engine recall (SC172/SC147) and class-action settlement. This is the second catastrophic failure of a Theta II engine in this vehicle. The replacement engine has now failed in the exact same manner as the thousands of other documented cases — rod bearing failure leading to knocking, overheating, and engine compartment fire. The dealership (Fowler Kia of Windsor, CO) inspected the vehicle and quoted over $6,000 in repairs (melted engine wiring harness, ECM connector, battery cables, airbox, intake boot, etc.) while claiming the fire was “unknown cause/not the engine,” despite the clear knocking immediately preceding the fire. Kia Consumer Affairs has an open case but has not yet resolved coverage. This is a known, ongoing safety defect covered under multiple NHTSA investigations (PE21004, EA22002) and Kia recalls. I no longer feel safe in this vehicle and am requesting immediate investigation and inclusion in any expanded recall or remedy.

I am getting a code that indicates an issue with the catalytic converter. P0420 to be specific. The engine is continually misfiring and check engine light comes on and off randomly. Car broke down completely at one point in October and had to replace the battery but check engine light was still on when I got it to start. The car shakes uncontrollably every time I drive it and gets even worse when idling. I took it to a mechanic and they believe it to be amongst the 2011-2016 SC176 recalled Kia Souls where high exhaust temperatures can damage the engine’s catalytic converter. Have attempted to take it for repairs/open recall and the manufacturers have consistently refused. Help in getting this issue sorted out would be much appreciated.

The check engine light came on and took in to have checked and am told I need a whole new engine. When Kia is contacted they are saying that they do not honor 100,000 mile warranty as I am not the first owner. I would like this to be honored because it is ridiculous that an engine would fail this soon. I have kept up on all oil changes and services since I have owned the vehicle

The Panoramic roof glass shattered. It was not hit by any external debris. It just exploded scaring the driver almost losing vehicle control. The dealer inspected it and confirmed nothing external caused it, however KIA will not warrant it. Our insurance company has not inspected it yet. It is available for inspection.

The contact owns a 2020 Kia Sportage. The contact stated that while driving at an undisclosed speed, the vehicle inadvertently lost motive power. The contact was able to pull over to the shoulder of the roadway, where the failure persisted. The contact also stated that the vehicle required an oil change every month. The check engine warning light was illuminated. The vehicle was taken to an independent mechanic, who diagnosed a failure with the engine. The contact was informed that the engine needed to be replaced. The vehicle was not repaired. The manufacturer was not notified of the failure. The failure mileage was unknown.

The contact owns a 2018 Kia Sportage. The contact received notifications of NHTSA Campaign Number: 22V703000 (Trailer Hitches) and 21V137000 (Service Brakes, Hydraulic); however, the contact was possibly charged for the recall repairs. The contact stated that while driving at various speeds, the vehicle failed to accelerate as intended while depressing the accelerator pedal. The KSDS warning light was illuminated. In addition, the contact became aware of abnormal oil consumption. The contact stated that after restarting the vehicle, the failure reoccurred. The vehicle was taken to a local dealer, where it was diagnosed, and DTC: P0010 was retrieved. The vehicle was repaired at the owner's expense; however, the local dealer diagnosed the vehicle and determined that the camshaft needed to be replaced. The manufacturer was made aware of the failure, and a case was filed. The failure mileage was approximately 150,000.

On my morning commute the engine light popped up and I started feeling a rumbling in my car when idle and gliding after accelerating. I suspect the issue is consistent with the recall for 2.0L Nu MPI engine due to a fire risk caused by faulty piston oil rings. Some sources say this is for 2020-2023 models and others report it being 2021-2023 so I am unsure if my car falls under this recall or perhaps this recall needs to be expanded.

Component that failed: The engine (2.0L Nu MPI) suffered a sudden internal mechanical failure. A connecting rod broke and punctured through the engine block. The failure was catastrophic and occurred without any warning lights, oil pressure warnings, overheating messages, or performance symptoms beforehand. Safety risk: The vehicle stalled instantly and lost all power while I was driving, which put my safety at risk. A sudden engine failure at speed can cause loss of control, a crash, or the inability to move the vehicle off the roadway. This type of failure is a serious safety hazard. Inspection and confirmation: The failure was confirmed by Kia of Riverdale on November 13, 2025. Their mechanic documented that the engine rod blew through the block due to internal damage. The dealer stated the vehicle is no longer drivable and needs a full engine replacement. Manufacturer response: Kia declined assistance because I am the second owner and the warranty has expired, even though this type of failure is consistent with known engine defects in Kia’s 2.0L engines involving connecting rods, oil starvation, and internal bearing failures. Kia did not inspect the vehicle beyond the dealership diagnosis and did not offer goodwill repair. Warning signs before failure: None. No warning lamps, noises, or messages appeared prior to the incident. The engine failed suddenly without any advance symptoms. Best assessment of cause: Based on the dealer inspection and Kia’s documented history of engine defects, the failure appears related to the same connecting rod and internal lubrication issues affecting similar Kia engines from nearby model years. Although my VIN is not currently included in an active recall, the mechanical failure matches the defect patterns described in existing Kia engine recalls. The vehicle remains unsafe and completely inoperable.