2020 Hyundai Palisade engine problems

Filed Oct 28, 2026 · Engine, Fuel system · FL

• Noticed a rattle sound when taking off and when the car was preparing to stop; All timely maintenance were done at Headquarter Hyundai in [XXX]. Oil change was done by Tires Plus ([XXX]) end of XXX as the car was just over 100k miles, so no warranty. • XXX, notice the rattle sound and notice the engine tremble when stopping. Returned to Tire Plus for diagnostic. XXX - TECH NOTED NO OIL ON DIPSTICK UPON ARRIVAL. CUSTOMER ADVISED TO DO OIL CHANGES MORE FREQUENTLY AT 3,000 MILE 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)

Filed Oct 5, 2026 · Engine · GA

My 2020 Hyundai Palisade (3.8L V6) suffered an engine failure at approximately 108,000 miles. On September 3rd,2026 , while driving at about 65 mph, the engine began knocking loudly. There was no warning before this happened and the engine light had not come on. The vehicle was taken to Shottenkirk Hyundai, an authorized Hyundai dealer, which diagnosed a connecting rod bearing failure. The repair order states: "Replace engine assembly due to piston slap on front bank caused by rod bearing failure." The dealer says the entire engine must be replaced. The vehicle has been maintained with regular oil changes. The failure was internal and was not caused by a crash, impact, or outside damage. I believe this is a safety defect. A connecting rod bearing failure can cause the engine to stall or seize without warning while driving, including at highway speed, creating a risk of a crash. A failed rod can also break through the engine block and leak oil onto hot engine parts, which is a fire risk. The vehicle is past Hyundai's 100,000-mile powertrain warranty. I have opened a case with Hyundai Consumer Affairs (case # 43347615) and am waiting for a decision. The vehicle and failed engine are available for inspection at the dealer. I am asking the federal safety agency to investigate connecting rod bearing failures in the 3.8L V6 engine in the 2020 Hyundai Palisade.

Filed Sep 24, 2026 · Engine · WA

My 2020 Hyundai Palisade (3.8L V6) has a persistent engine defect causing sudden stalling and severe oil consumption. Since mid-2019 the engine has stalled without warning when coming to a stop, idled roughly, and made loud puttering noises under light acceleration — a loss-of-power hazard in traffic. In 2026 the dealer began formal oil consumption testing. Although 1,000-mile checks were marked 'passed,' the engine was found completely dry (dipstick showed no oil) at 2,000 miles — 3.5 quarts low on a 6.1-quart system. On 09/02/2026 the vehicle FAILED an official oil consumption test at Hyundai of Kirkland and was held for service. The dealer performed a carbon-cleaning procedure, but the underlying oil consumption is unresolved and a re-test is now underway. Running an engine at less than half its oil capacity risks sudden seizure or stall at speed. I am concerned this is a systemic defect affecting other 2020 Palisades and request the federal safety agency investigate.

Filed Sep 23, 2026 · Engine · TN

Defect & Safety Hazard: Severe internal manufacturing defect causing catastrophic engine oil consumption and sudden, un-warned engine stalling. The vehicle completely shuts down at highway speeds, on inclines, and at stops. This sudden loss of motive power deactivates power steering and braking assists, creating an immediate multi-vehicle collision risk. No low-oil or dashboard indicators illuminate prior to stalling, stripping the driver of any ability to take proactive safety measures. Indisputable Failure Data: Between 99,xxx miles (under warranty) and 103,xxx miles, the engine consumed 5.5 quarts of oil over a 3,000-mile interval. This equals an extreme burn rate of 1.83 quarts per 1,000 miles. Hyundai’s maximum corporate failure limit (1.0 qt/1,000 miles). Secondary diagnostics indicate this massive volume of un-combusted oil is actively pushing into the exhaust system, creating restrictive backpressure that induces stalling. Timeline & Dealer Obstruction:Rusty Wallace Hyundai: Inspected vehicle under 100,000 miles and initiated the first 1,000-mile consumption test, but subsequently refused documentation and further warranty services. A corporate national claim and customer service complaint were filed against them.Grayson Hyundai: Completed a second 1,000-mile test documenting a definitive failure. They confirmed this is a common, known systemic issue and recommended full engine replacement.Federal Violations: Under the Magnuson-Moss Warranty Act, because the defect was reported to a dealer before warranty expiration, Hyundai is legally required to cover the defect. Forcing a vehicle that burns 5.5 quarts of oil onto public roads also violates strict EPA Clean Air Act emissions compliance standards. Hyundai's current demand for out-of-pocket payment must be rescinded for full corporate coverage.

Filed Sep 18, 2026 · Engine · FL

I am reporting severe and recurring oil consumption in my 2020 Hyundai Palisade that could cause engine damage, engine seizure, stalling, or a sudden loss of power while driving. On April 14, 2026, at approximately 89,950 miles, an authorized Hyundai dealership documented that the engine had consumed approximately 1.3 quarts of oil in only 1,275 miles, equivalent to approximately one quart every 982 miles. The vehicle failed Hyundai’s initial oil-consumption test. Hyundai then authorized a combustion-chamber cleaning. On May 12, 2026, at 91,087 miles, the dealership completed the follow-up test and stated that the vehicle passed at that time. On September 14, 2026, at 95,512 miles, I returned to the dealership because the engine again had no measurable oil remaining. Only 4,425 miles had elapsed since the May oil change. The dealership’s repair order states that the vehicle “has no oil again.” I also reported that the vehicle had begun stuttering and rattling when pressing the brake and coming to a stop, creating concern that the engine may already have sustained damage from insufficient lubrication. The dealership initiated another oil-consumption test and instructed me to return after 1,000 miles. However, the earlier combustion-chamber cleaning did not correct the underlying problem. I am concerned that the vehicle may again consume its oil without adequate warning and could stall, seize, or lose power while being driven, placing the occupants and other motorists at risk. Hyundai should investigate the cause of the recurring oil loss and determine whether 2020 Hyundai Palisade vehicles have defective piston rings, cylinders, valve components, PCV systems, or other engine components causing excessive oil consumption. I am requesting that the federal safety agency document and investigate this potentially dangerous engine defect.

Filed Sep 15, 2026 · Engine · LA

I am filing this safety complaint regarding excessive oil consumption in my 2020 Hyundai Palisade, which presents a direct vehicle stalling and engine failure hazard while driving at highway speeds. My vehicle is currently consuming approximately 5 quarts of engine oil every 3,000 miles. This severe oil loss occurs rapidly between scheduled maintenance intervals without any illuminated dashboard warning lights, low oil pressure indicators, or visible oil leaks on the ground. The oil is burning internally within the combustion chamber. This creates an extreme safety risk. If the oil level drops dangerously low before the next service, the engine is at risk of sudden catastrophic failure, severe overheating, or immediate stalling while in motion. A sudden loss of propulsion while driving in heavy traffic or at highway speeds places myself, my passengers, and other drivers at risk of a serious collision. Furthermore, the lack of an early warning sensor or dashboard indicator for low oil volume means the driver is left entirely unaware of the hazard until the engine begins to fail. Hyundai is well aware of this widespread oil-burning defect in their V6 engines, yet because my vehicle has reached 160,000 miles, they refuse to provide any diagnostic support, remedy, or warranty assistance. I am requesting that the federal safety agency open a formal investigation into the 2020 Hyundai Palisade engine oil consumption defect to compel the manufacturer to issue a safety recall before a catastrophic stalling event causes a fatal accident.

Filed Sep 10, 2026 · Engine, Fuel system · CA

I do not understand how Hyundai can approve its required testing process, have the vehicle fail that test, and then deny the engine replacement resulting from those findings. This is unfair and raises serious concerns about how Hyundai is applying its warranty procedures.Hyundai’s published oil-consumption procedures establish a process for diagnosing excessive oil consumption and determining when further repairs, including engine replacement, may be warranted. I am requesting that Hyundai explain exactly what requirement my vehicle allegedly failed to meet and provide documentation supporting the denial.I am requesting that Hyundai reverse the denial and fully cover the necessary engine replacement under warranty. I also request a complete review of my maintenance history, repair records, oil-consumption test results, diagnostics, and the dealership’s submission. This vehicle has been properly maintained and has only approximately 80,000 miles. I purchased it expecting a reliable vehicle that would last many years. An engine developing excessive oil consumption at this mileage is unacceptable, and I believe Hyundai should stand behind its product and warranty obligations.

Filed Sep 4, 2026 · Engine, Transmission · WA

On August 14, 2026, while driving and decelerating, I heard a knocking sound from the engine and the vehicle had difficulty downshifting. As the transmission shifted from second gear to first, the engine stalled immediately and the vehicle dropped into neutral while on the roadway. I lost propulsion in traffic. The vehicle behind me nearly rear-ended us due to the sudden stall. My children were in the vehicle. All dashboard warning lights illuminated at the moment of the stall. I was able to restart the engine and move the vehicle slowly, in first gear only, into a nearby parking lot. The check engine light came on at that restart and has remained on since. The vehicle sat parked and off for approximately 90 minutes. Before restarting, I checked the engine oil level and it was within the normal range. On startup, my children and I both heard a loud knocking sound and noticed an unusual smell, and the engine idled roughly while in Park. I drove approximately 15 minutes home with the rough idle continuing. On arrival the vehicle smelled hot, with a burning odor, although the temperature gauge read approximately mid-scale and was not in the high range. The check engine light remained on and the oil level was again confirmed to be within range. The vehicle has been out of service since the incident and is currently at a dealership awaiting diagnosis. This is a 2020 Hyundai Palisade with approximately 93,000 miles at the time of failure. A sudden loss of motive power in a travel lane is a safety defect.

Filed Aug 25, 2026 · Engine · NC

My 2020 Hyundai Palisade (3.8L GDI Lambda II V6) consumes engine oil at a rate that empties the crankcase between scheduled oil changes, with no warning lamp illuminating before the oil is gone. This creates a risk of engine seizure and sudden loss of motive power in traffic. The vehicle has repeatedly run rough and felt as though it would stall when slowing or stopping. On 3/10/2025 at 57,026 miles I brought it to a Hyundai dealer because it felt like it was about to stall at traffic lights. The technician found no measurable oil on the dipstick, 4.5 quarts low, and found the camshafts out of time as a result. On 11/25/2025 at 69,851 miles the oil light flickered and the engine ran rough and stuttered. The dealer checked the dipstick and again found no oil on it at all. This was only 5,614 miles after a documented oil and filter change performed by that same dealer. No warning illuminated until the crankcase was already effectively empty, which I consider inadequate warning of imminent engine failure. Consumption has continued and worsened: 1 quart low at 77,202 miles (4/22/2026), 1.5 quarts low at 81,350 (5/14/2026), and 1.2 quarts low at 82,927 (8/11/2026), the last only 1,577 miles after an oil change. Hyundai TSB 23-EM-008H sets the failure threshold at 1 quart per 1,000 miles for all gasoline engines. The dealer twice billed Hyundai operation code 21000FCC, which that bulletin defines as payable only after an initial oil consumption test result of NG (failed). Two combustion chamber cleanings were performed at Hyundai's expense (1/2026 and 5/2026). Neither resolved the consumption. On 5/14/2026 the dealer submitted a request to Hyundai Motor America to replace the engine. Hyundai denied it verbally and has provided no written decision, case number, or reason. This is our family's primary vehicle and remains in service. I must check the oil weekly to keep the engine from running dry. Complete dealer service records are available.

Filed Aug 18, 2026 · Electrical, Engine · NC

This vehicle has suffered two identical, catastrophic electrical failures causing an immediate and total loss of engine power while traveling at highway speeds. The first incident occurred after the engine was replaced under a Hyundai extended warranty. The dealership service department blamed that failure on a loose engine ground strap and released the vehicle back to me. On August 3, 2026, the exact same failure occurred for a second time while driving at high speed on the highway. The vehicle lost all propulsion, leaving me exposed to oncoming traffic with zero engine power. The vehicle was towed to a Hyundai dealership. The dealership identified a blown "Sensor 4" fuse causing an intermittent dead circuit, but they have been unable to locate the short circuit after two weeks of troubleshooting. After demanding the diagnostic data logs, the dealership abruptly halted all repairs and ordered me to pick up the vehicle. Furthermore, due to excessive, repetitive diagnostic cranking and idling in 90+ degree heat while under the dealer's care, the vehicle's starter solenoid has now suffered collateral failure. The vehicle is currently completely disabled, undrivable, and the underlying highway stalling hazard remains completely unresolved. This is a recurring, severe life-safety issue that leaves the vehicle prone to sudden stall events in high-speed traffic without warning.