Hyundai Palisade Engine problems by year

their own Shop Foreman and video proof of the failure, Hyundai Techline is attempting to deflect liability by blaming a previously installed aftermarket oil filter. The dealership has since replaced the aftermarket filter with an OEM filter. However, instead of repairing the diagnosed internal engine defect, they are forcing me to drive this malfunctioning vehicle for an additional 1,000 miles to "duplicate" the issue. Operating a vehicle with a known, documented internal engine failure on public roads poses an immediate and severe safety hazard to myself, my kids, and other drivers. The vehicle is at imminent risk of sudden engine stalling, complete power loss, or catastrophic mechanical seizure at highway speeds, which could cause a serious collision. The manufacturer is actively demanding that I operate a dangerous vehicle as a condition of their warranty process, shifting extreme physical liability onto the consumer.

vehicle utilizes an electronic gear selector, the transmission could not be shifted into Park (P) or Neutral (N). I was forced to bring the vehicle to a stop directly in the active roadway lane and manually hold down the mechanical brake pedal to prevent rollaway. This sudden vehicle blackout and total loss of propulsion in active traffic created an immediate life-safety hazard, stranding the unlit vehicle in a live traffic lane without emergency signals. The vehicle had to be towed via tow truck to dealer. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

sudden loss of engine power simultaneously disabled the power steering and power braking assistance, creating an extreme and immediate safety hazard as I was forced to navigate a completely dead, non-responsive vehicle across multiple active lanes of traffic to reach the shoulder. The vehicle was manually pushed directly to a licensed Hyundai dealership 1/2 a mile, where technicians confirmed a catastrophic internal engine failure with a thrown rod through the engine block. The vehicle had a consistent and documented maintenance history prior to the incident. No warning lights or oil pressure indicators illuminated on the dashboard prior to the sudden knocking and immediate engine destruction. This defect poses a severe, life-threatening safety risk due to the sudden loss of vehicle control on public highways.

INTERVALS; NO VISIBLE OIL LEAKS AT THIS TIME - INTERNAL ENGINE OIL CONSUMPTION. POTENTIAL PISTON RING OR ENGINE BEARING ISSUE CAUSING OIL CONSUMPTION. COMPUTERIZED ENGINE ANALYSIS. • My safety was at risk when the oil notification failed to occur, when the check engine notification failed to occur. These failures could have resulted in a complete shut down of the engine resulting in an immediate collision as I travel on the interstate daily for work. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

tow to Don Bessette Hyundai in [[redacted]]. The dealership documented 36 stored diagnostic trouble codes, primarily communication faults. The codes were cleared, and an ECM software update was performed. No confirmed cause was identified. [redacted] The instrument panel went completely black twice while driving, lasting approximately 10 minutes and 14 minutes. [redacted] While driving at night, the interior and exterior lights again flickered off and on. Approximately 30 minutes later, the instrument panel went black and the exterior lights dimmed. We pulled over, activated the hazard lights, and restarted the vehicle, but normal lighting did not return. We drove approximately 14 miles with hazard lights on to reach the nearest town. The lights eventually returned, but the instrument panel continued flickering, the front camera repeatedly reported being disabled, and driver-attention warnings appeared during the drive home. These failures continued after dealership service and a software update. We are concerned about another sudden loss of engine power, headlights, or critical driver information at highway speeds. These failures pose a serious safety risk to occupants and other motorists. We request that NHTSA investigate these electrical failures. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

oil consumption test. When I returned after 750 miles, I was told I had returned too early. The engine subsequently shut off twice on [redacted]. Documented incidents: [redacted] 1:53 PM: Engine shut off on [[redacted]]. [redacted], 5:38 PM: Engine shut off on [[redacted]]. [redacted], 5:08 AM: Engine shut off at [[redacted]] exit, [[redacted]] [redacted] 11:35 AM: Engine stalled at [[redacted]]/[[redacted]]. [redacted], 12:30 PM: Engine stalled at [[redacted]]/[[redacted]]; check engine light illuminated. [redacted], 10:57 AM: Near-stall with severe rough idling at Los Gatos Farmers Market. After further rough idling, the check engine light remained illuminated. On [redacted] the dealership service advisor personally experienced severe rough idling and an apparent near-stall while moving my vehicle, with the check engine light on. I heard her acknowledge the issue. The vehicle remains at the dealership. I provided a written incident log and opened Hyundai case #[redacted]. Repeated engine shutdowns at intersections and freeway exits pose a serious collision risk. I request NHTSA investigate this potential safety defect. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

high RPMs, and refuses to shift properly through lower gears (gears 1 to 3). This causes sudden hesitation, loss of motive power, and violent jerking when accelerating and merging into active traffic, creating an imminent crash hazard. The manufacturer has refused repair assistance despite cascading powertrain defects that originated prior to 100,000 miles.

rough, and the tachometer shows about 500 RPM. When I shift to park, the idle smooths out. When I shift back to drive, it becomes very rough again. Pulling away from the light is difficult because the vehicle hesitates and does not accelerate normally. This has happened three times since the repair, most recently on [[redacted]] at about 5,800 miles. The check engine light did not come on. Conditions: 80 F, clear weather. [[redacted]] exit [[redacted]]. This is a safety concern because the vehicle may not accelerate when I pull into an intersection or merge into traffic. Other 2026 Palisade owners have reported similar misfires and hesitation, and Hyundai issued TSB 26-01-068H (Service Campaign 9D6) for engine misfires on 2026 Palisade 3.5L vehicles. I have asked Hyundai to confirm whether this campaign has been performed on my vehicle. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

day, on September 22, 2026, at approximately 2:49 PM, the vehicle abruptly triggered a powertrain fail-safe mode in traffic, forcefully restricting speed to roughly 20 mph (limp-in mode), when my wife found it when trying to running faster from a STOP mode, to prevent catastrophic catalytic converter damage caused by persistent combustion misfires. It is impossible to be the wrong operation of my wife since limp-in mode cannot be activated during low speed running. On September 23, 2026, the vehicle was taken to an authorized Hyundai dealership to apply pending TSB 26-01-068H (Campaign 9D6). While the dealer completed the software update and reported no active DTCs remained afterward, Hyundai Motor America has flatly denied manufacturer liability for the property damage incurred directly prior to this safety remedy. Hyundai's ECM software logic flaw poses a critical safety risk involving unintended acceleration, complete shutdown failure, and active safety system non-intervention. I request NHTSA investigate this defect and Hyundai's refusal to remediate related incident damage.