2019 Hyundai Santa Fe: sudden loss of power

Filed Sep 2, 2026 · Engine, Fuel system · VA

Update Re: ODI Complaint Number: 11759237 Subsequent Actions and Manufacturer Refusal to Remediate Safety Defect: ​Following the [XXX], acute safety incident—where the vehicle lost motive power and entered severe limp mode on [XXX] immediately upon release from Sheehy Hyundai of Chantilly—the vehicle remained in dealer custody for 11 days (August 20–August 31, 2026). ​Failure to Diagnose Core Defect: Despite recurring total power loss, active diagnostic trouble code P00AF00 (Turbocharger Boost Control Module Performance), and four consecutive turbocharger destructions within 20,000 miles, the authorized dealership refused to conduct internal engine diagnostics, drop the oil pan, inspect the oil filter, or perform borescope checks. ​Physical Contamination Documented: On August 29, 2026, an on-site physical inspection confirmed sparkling metallic particulate suspended in the engine oil on the dipstick and substantial oil blow-by/intrusion into the turbocharger air intake line. ​Formal Denial of Safety/Warranty Coverage: On August 31, 2026, dealership management and Hyundai Motor America (Consumer Affairs Case #[XXX]) formally denied warranty assistance and refused engine teardown under the Theta II Lifetime Engine Warranty Settlement. Coverage was declined citing "outside influence" due to an aftermarket turbocharger assembly, while Hyundai refused to investigate the underlying engine failure contaminating and destroying the forced-induction system. ​Evidence Preservation: On August 31, 2026, the vehicle was towed to an independent facility to mitigate road hazards, conduct teardown diagnostics, and preserve the engine oil/filter for ISO-accredited spectrographic laboratory analysis. ​The manufacturer released an unsafe vehicle into traffic on August 20, 2026, and subsequently refused to investigate or remedy a documented internal engine failure that creates sudden, recurring loss of motive power. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Filed Apr 30, 2026 · Transmission · CA

Vehicle Information: 2019 Hyundai Santa Fe Mileage at failure: approximately 109,000 miles Manufacturer: Hyundai Motor Company The vehicle experienced a complete failure of the automatic transmission system. The failed component is available for inspection upon request. At approximately 98,000 miles, the vehicle’s check engine light illuminated. I brought the vehicle to an authorized Hyundai dealership for diagnosis while it was still within the 100,000-mile powertrain warranty period. The dealership inspected the vehicle and advised that no issue was found, and no repairs were performed at that time. Approximately 11,000 miles later, the vehicle experienced severe transmission problems, which progressed to complete transmission failure at approximately 109,000 miles. Safety Risk: The transmission failure resulted in a sudden loss of power and reduced vehicle operability while driving. This condition presents a potential safety risk to the driver and surrounding traffic, particularly during normal roadway and highway use. Prior Inspection / Diagnosis: The issue was not identified or reproduced during the dealership inspection at approximately 98,000 miles when the check engine light was present. Other Inspections: The vehicle was inspected by a Hyundai dealership at approximately 98,000 miles. No inspection by police, insurance representatives, or manufacturer engineering personnel has occurred since the transmission failure. Warning Signs: Check engine light illuminated at approximately 98,000 miles Vehicle was taken to dealership for diagnosis at that time No specific transmission warning messages were displayed Dealership reported no issue found Maintenance History: The vehicle has been regularly maintained with oil changes performed approximately every 5,000 miles. Maintenance records are available for review upon request.

Filed Nov 25, 2025 · Brakes, Driver assistance · WA

Overly excessive oil consumption 2 Quarts every 3 or 4 days.no leaks. Engine gets so hot I don't have to turn on heater In winter. On going issue since 100,000 miles. EBS light stays on electronic parking brake switch does not work. Parking brake will randomly engage after vehicle is turned off. Dealership cannot duplicate issue. If cruse control is turned on the vehicles warning lights all of them will suddenly illuminate and the vehicle shuts off. alternator and battery replaced. Have not used cruse control since. Airbags never inflated in a front end crash at 45mph Most recently I started experiencing I intermittent trouble staring the car. Then one day it didn't start at all and smoke was coming from under the hood. Towed to mechanic , starter burnt up 155,000. $ 900 to replace then a couple days later I lost power on the freeway and the car started jerking and vibrating. Stopped Vehicle cut off and would not start. After 1hr I started and limped home. Vibration under 2000 RPMs and when stopped. Knocking noise under hood. Brand new spark plugs. Mechanic stated Cylinder 3;missfire was identified as a hole in a valve due to weak material now I have to replace engine. Oil consumption and excessive friction and heat is to blame. My car has been cared for like a baby it's all I have. I should not have to be responsible for this very cheaply made engine that was doomed to fail.

Filed Dec 27, 2019 · Engine · 16,000 miles · FL

Tl* the contact owns a 2019 hyundai santa fe. While driving 17 MPH, the bca braking system engaged, the vehicle lost power, and all the warning indicators illuminated on the instrument panel. The contact turned the vehicle off and back on, which returned it back to normal. The vehicle was taken to o'brien hyundai ft myers (2850 colonial blvd, fort myers, fl 33966, (239) 880-8631) where it was test driven for approximately 77 miles; however, the failure could not be duplicated. The vehicle was not repaired. The manufacturer was made aware of the failure and provided the contact with case number: 16693618 and a loaner vehicle. The contact referenced the federal safety agency id number: 10167260. The failure mileage was approximately 16,000.

Filed Jul 13, 2019 · Brakes, Engine · 2,500 miles · GA

Stopped vehicle on side of neighborhood road on moderate downward incline. Placed vehicle in park and at idle. A few minutes later, shifted car into drive and proceeded to pull out into roadway. Vehicle seemed to lose power steering as well as power braking. As the vehicle turned a corner, it lost acceleration (car slowed to a stop as accelerator was pressed) , and tachometer decreased to zero. Pulled to side of road as car slowed to a stop. Total distance car travelled at this point was about 75 feet). Put car in park and turned off engine. Waited for a few minutes, restarted engine, placed car in drive and drove home ( about 40 feet). Problem: car engine stalled, cause unknown.