Hyundai Kona loss of power problems

Filed Sep 30, 2026 · Engine · IA

On September 11, 2026, while driving my 2019 Hyundai Kona Limited 1.6L Turbo on the highway, the vehicle suffered a sudden and dangerous loss of propulsion. The engine began vibrating violently, lost power significantly, and a strong chemical burning smell entered the cabin. I was forced to pull over immediately in traffic to avoid a catastrophic fire or highway collision. The vehicle had to be towed to McGrath Hyundai. The official dealership inspection (RO# 949326) confirmed severe internal manufacturing defects: cylinder wall scoring on cylinders 2, 3, and 4 due to premature piston ring wear, which caused massive oil fouling on the spark plugs and total ignition failure. This defect creates an immediate highway safety hazard and risk of engine fire due to oil entering the combustion chamber. Hyundai Motor America refuses to issue a safety recall for this 1.6L Gamma engine defect, leaving consumers driving unsafe vehicles with active loans.

Filed Aug 21, 2026 · Engine · AL

At approximately 100,500 miles, the 2.0L Nu engine experienced a sudden, catastrophic internal failure while operating, causing a loss of power and stalling. Failed Component & Availability: The engine block assembly failed internally due to severe low compression (95 psi) across multiple cylinders and intake valve leakage. The original failed engine component was replaced and retained by the servicing dealership's service department during the long-block replacement. Safety Risk: The sudden loss of engine power and stalling occurred while navigating active traffic, creating an immediate crash hazard due to the loss of momentum and propulsion on a public roadway. Diagnosis & Confirmation: The failure was independently confirmed by a certified master mechanic (compression test showing 95 psi) and subsequently diagnosed and confirmed by an authorized manufacturer dealership service department. Inspection History: The vehicle was fully inspected by the authorized dealership, which verified the low compression, confirmed internal engine failure, and performed a full long-block engine replacement.

Filed Aug 18, 2026 · Acceleration, Engine · OR

The engine was spewing oil into the air filter and also out of a hose near the turbo. It was also consuming high amounts of oil, yes its available for inspection. I was driving on a busy public highway and my car lost power and would not accelerate no the problem has not been confirmed as of yet vehicle has not received official inspection yet there was zero warning lamps, messages, or any indicator of any kind that there was a problem. there still isnt

Filed Aug 18, 2026 · Engine · 81,000 miles · CT

The contact's daughter owns a 2019 Hyundai Kona. The contact stated that while her daughter was driving 40 MPH, smoke started coming from under the hood. The vehicle lost power and came to a stop in front of a convenience store, blocking the entrance. Several unknown warning lights were illuminated. The driver called the Fire Department, and it was confirmed that the engine compartment displayed severe heating damage. There was no fire. The firemen on the scene recommended that the vehicle be towed. The vehicle was towed to an independent mechanic, and the contact was informed that the failure was a known failure and might be covered under an extended warranty program. The vehicle was towed to the dealer, where it was diagnosed and determined that the engine had seized. No electrical failure was found. The dealer initially offered to cover 95% of the cost of the repair. The manufacturer was notified of the failure and offered to cover 85% of the cost of the repair, but the contact declined. The contact stated that the Knock Sensor Detection System (KSDS) software update had previously been completed on the vehicle; however, the update failed to prevent the engine failure. The manufacturer informed the contact that the extended warranty could not be applied due to a transfer of ownership to the contact's daughter. The failure mileage was approximately 81,000.

Filed Jul 16, 2026 · Engine · TX

The vehicle suffered a sudden, severe loss of power while driving, causing the engine to stall unexpectedly. This created an immediate hazard to myself and other motorists on the road, as I was forced to navigate a dead vehicle out of active traffic without power steering or power braking assist. Prior to the total failure, the engine exhibited severe mechanical knocking, loss of acceleration, and high oil consumption without any visible external oil leaks. This engine failure is a direct result of the manufacturing defect detailed in the federal safety agency Safety Recall 203 (the federal safety agency Campaign 21V301000) concerning improperly heat-treated piston oil rings that cause severe cylinder scuffing and engine stall. Although the software update (Campaign 974) was previously completed on this VIN, the physical defect was never mechanically repaired. The software update failed to prevent the physical, defectively manufactured components from destroying the engine. Hyundai is refusing to honor the safety campaign and replace the failed engine because the recall database incorrectly lists the recall status as "completed."

Filed Jun 30, 2026 · Engine, Fuel system · TX

Low speed hesitancy and shuddering. Car has lost power when driving at 55 mph. Car does not want to move at very slow speeds as in a parking garage. It hesitates and starts to roll backwards.

Filed Jun 18, 2026 · Steering · 28,791 miles · AL · crash · 1 injury

The contact owned a 2024 Hyundai Kona. The contact stated that while driving and pulling out of a parking space, the steering wheel turned to the right and then left, after which the vehicle lost power and steering capability. As a result, the contact was unable to maintain control of the vehicle and collided with a pole. The contact could not recall any warning indicators that illuminated after the incident. The driver side bumper and hood sustained damage from the collision and a nearby concrete barrier was also scratched. The vehicle came to a stop in the parking lot in front of the pole. No air bags deployed. The vehicle was subsequently towed to a collision repair facility. No police report was filed. The insurance company determined the vehicle to be a total loss. The contact stated that the seatbelt locked during the crash, causing strain to the left shoulder and a laceration to the left thigh. The contact also reported striking the steering wheel. No medical treatment was sought. The dealer and manufacturer were notified of the failure. The vehicle was not diagnosed or repaired. The approximate failure mileage was 28,791.

Filed May 19, 2026 · Engine · MS

I purchased my 2022 Hyundai Kona on August 28, 2024, and I am the first registered owner. Only 48 days after purchase, the vehicle suddenly broke down without warning while stopped at a red light in [XXX] after traveling from [XXX] . The vehicle had to be towed. Since then, the vehicle has repeatedly experienced dangerous engine and timing-related issues despite major repairs, including an engine replacement, timing chain repairs, and multiple dealership inspections. The most dangerous incidents involve sudden power loss and large clouds of smoke while driving. On January 1, 2026, while attempting to pass a semi-truck on a multi-lane highway, the vehicle suddenly lagged, lost acceleration power, and emitted a large cloud of white smoke from the exhaust. This created an extremely unsafe situation because I was actively passing traffic at highway speeds and could have been struck by surrounding vehicles. I have also experienced these failures late at night on busy highways while traveling between [XXX] and [XXX] . In March 2026, the vehicle again emitted a large cloud of smoke and resumed lagging during acceleration. On April 23, 2026, Hyundai of Meridian informed me they personally witnessed the vehicle emit another large cloud of black smoke during test driving. These smoke events can reduce visibility for surrounding drivers and create hazardous roadway conditions. The vehicle has spent approximately 149 days in repair facilities, nearly 24% of the time I have owned it. Multiple dealerships documented timing chain slack, cam timing issues, and major engine concerns. Despite the recurring failures and safety concerns, Hyundai denied replacing the engine again and denied buying back the vehicle. I no longer feel safe operating this vehicle due to the risk of sudden power loss, engine failure, and smoke emissions while driving in traffic. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed May 6, 2026 · Electrical · PA

The vehicle experienced a total electrical failure while driving. Dealer diagnosed the issue as a loose fuse box connector/power distribution connector. The vehicle and repaired component should be available for inspection through the Hyundai dealer service department. The vehicle suddenly lost all power while being driven on a public roadway. The engine shut off, dashboard went dark, and power steering assistance was lost, creating a risk of collision and leaving the vehicle disabled in traffic. A Hyundai dealer diagnosed and confirmed that a loose fuse box connector caused the loss of power. The vehicle was inspected by an authorized Hyundai dealer service department. No police or insurance inspection was performed. No warning lights, messages, or symptoms appeared prior to the failure. The vehicle lost power suddenly without warning while driving.

Filed May 1, 2026 · Engine, Transmission · VA

The vehicle suddenly stalled while driving on the highway at normal speed without warning. The engine lost power completely, creating a dangerous situation and a risk of collision with surrounding traffic. The vehicle had to be towed to a repair shop, where the issue was diagnosed as engine failure. There were no warning lights or prior symptoms before the incident. This appears to be a serious safety-related defect. I am aware that similar engine issues have been reported in Hyundai vehicles.