2016 Hyundai Sonata recalls & problems

Recent owner complaints

• Apr 20, 2026 · 70,000 milesEngine and engine cooling
  The contact owns a 2016 Hyundai Sonata. The contact stated that while getting an oil change, the contact was informed that the oil pan was empty. The contact could not recall seeing leaks or making changes to the oil change routine. An independent mechanic informed the contact of an engine recall regarding excessive oil consumption. The contact was referred to the dealer. The contact had the oil inspected twice more and was informed of low oil levels on each occasion, but there were no leaks or burning oil odors. The vehicle was taken to the dealer, where it was confirmed that no open recall was associated with the VIN. The dealer replaced several sensors; however, the contact was unable to…
• Jun 20, 2026 · 60,436 milesEngine
  The contact owns a 2016 Hyundai Sonata. While the contact's daughter was driving 55 MPH, the engine seized. The contact stated that the failure had occurred while the contact's two minor grandchildren were inside the vehicle during the failure. The vehicle was towed to an independent mechanic. The vehicle was later towed to the dealer where it was diagnosed with engine failure. The contact was informed that the engine needed to be replaced. The manufacturer was contacted, and a case was filed. The contact was informed about the eligibility for the extended warranty under Campaign 953. The contact was informed that the repair was not covered under the extended warranty because the Campaign…
• Oct 3, 2026Engine
  While driving on the freeway, the check engine light started flashing and the gas pedal became useless. This put the driver and the passenger of the car in massive danger as they could no longer accelerate on the freeway. Luckily, they were able to get off the freeway without causing an accident. Upon reading the code at an auto shop, they discovered that it was P1326 or a knock sensor issue. This malfunction caused the car to go into limp mode and put the passengers in serious danger. Several calls to the Hyundai Service Center were made yesterday (Saturday, October 3rd). However, not one was ever answered. They hope to be able to get the car to the dealership's service center as soon as…
• Jan 1, 2025Electrical system
  Backup vision system failed. Couldn't see vision because screen was blank. Radio didn't work either. Went to dealership with the problem they said it was not covered by the warranty. Paid to have it fixed.
• Sep 15, 2026Engine
  I am concerned that the engine may seize or stall without warning while driving, creating a risk of crash, injury, or death. The Theta II engine defect is known to cause engine seizure, stalling, and fire. Hyundai has denied warranty coverage based on mileage and second-owner status — both of which are explicitly prohibited as denial grounds under the Settlement — leaving me driving an unsafe vehicle.
• Aug 7, 2026Engine
  The vehicle experienced a Theta II engine failure at under 57,830 miles while driving on northbound [XXX] near the [XXX] Parkway U-turn in [XXX]. The engine made a loud noise and lost power. I was able to coast to the far right side of the U-turn under the bridge. I called HERO (Austin's emergency roadside assistance). They responded, determined it was not a battery issue, and pushed the vehicle to the Southern Leisure Spa parking lot on the southbound side of the road. The vehicle was then towed. The vehicle is equipped with the KSDS (Knock Sensor Detection System) software update, installed as part of Hyundai's remedy for this known defect. Despite KSDS being installed, the engine failed…
• Aug 20, 2026Engine
  The car died while going 70 on a highway with no warning signs. The car completely shut off and will not turn over or move at all.
• Jul 27, 2026Engine
  Component & Inspection: Vehicle engine suffered connecting rod bearing failure and entered restricted P1326 "Limp Home Mode" (max 2,000 RPM). The vehicle is grounded and available for inspection at Bud Clary Hyundai in [XXX].Safety Risk: Sudden, unexpected loss of power occurred while driving, placing me and other drivers at immediate risk on public roads due to the vehicle's inability to maintain normal traffic speed or safely accelerate.Dealer & Corporate Confirmation: Active P1326 engine code is confirmed. Car has been held for 14 days. The franchise is violating federal settlement rules by explicitly refusing to execute the mandatory, free mechanical Bearing Clearance Test (BCT) unless…

Owner complaints are submitted to NHTSA by the public and are not verified. Shown as filed (NHTSA removes personal details); long reports are shortened.

NHTSA defect investigations

• DP22003 · opened Sep 12, 2022 · closed Dec 12, 2023Loss of Motive Power
  The National Highway Traffic Safety Administration (NHTSA) received a letter dated July 13, 2022, petitioning the Agency to initiate a safety defect investigation into loss of motive power allegations attributed to oil drain pan assembly failures on certain Hyundai Motor America, Inc. and Kia America, Inc. vehicles spanning Model Years (MY) 2005-2021. The Petitioners cited examples of complaints indicating that the subject vehicles were experiencing rapid loss of engine oil due to oil drain plug back outs, resulting in loss of motive power and/or catastrophic engine damage. Additional complaints were provided which alleged that the oil drain pans lack sufficient structural integrity and are susceptible to cracking. The petition itself can be reviewed at NHTSA.gov under ODI number 11481745. On September 12, 2022, the Office of Defects Investigation (ODI) opened Defect Petition (DP22-003)…
• EA21003 · opened Dec 22, 2021 · closed Feb 5, 2024 · led to recall 23V877Engine Fires
  On March 29, 2019, the Office of Defects Investigation (ODI) opened two Preliminary Evaluations (PE19-003 on Hyundai and PE19-004 on Kia) to broadly investigate incidents of non-crash fires (regardless of origin or operational status of the vehicle) on various model year Hyundai and Kia vehicles. During the PE investigations, Hyundai and Kia issued several recalls to address vehicle fires, including those due to engine failures involving various engine types. The remedies for the engine failure recalls typically involve engine inspection (to detect existing damage), and if necessary, engine replacement. Additionally, both manufacturers have been installing an engine control software modification known as Knock Sensor Detection Software (KSDS) which is intended to detect impending engine failure, alert the driver, and limit engine power (to lessen likelihood of engine failure).KSDS is…
• EA19001 · opened Apr 19, 2019 · closed Sep 19, 2024 · led to recall 20V024Electrical overstress
  The Office of Defects Investigation (ODI) opened this investigation to determine if the failure of airbags to deploy during severe crashes, in certain vehicles, was the result of a safety related defect. During the investigation a complex failure was studied that can result in non-deployment of subject vehicle air bags and other restraint system devices in severe crash events. The subject vehicles may be equipped with an airbag control unit (ACU) for the supplemental restraint system (SRS) Electronic Control Unit (ECU) manufactured by ZF-TRW.  The ECU receives signals from crash sensors mounted in the vehicle and deploys the vehicle air bags and seat belt pretensioners in accordance with manufacturer design specifications.  The ECU in the subject vehicles contains a model DS84 application-specific integrated circuit (ASIC) which controls the communication of the crash sensor signal,…
• PE16010 · opened Sep 3, 2016 · closed Feb 22, 2017Electronic Parking Brake
  The Office of Defects Investigation opened this investigation on September 3, 2016 based on four reports alleging the rear brakes locked or applied while driving without brake pedal application. One of the reports alleged a fire in the right rear wheel area.The vehicles subject to the investigation are equipped with an optional Electronic Parking Brake (EPB). In this system, an electric motor applies the parking brake by moving the rear brake pads (pads) against the brake rotors (rotors) when activated by the EPB control switch. The EPB is released by the control switch or by selecting a drive gear with the transmission shifter when the ignition is on.If the EPB has not been used within 1000 kilometers (621 miles) the system is designed to perform an Automatic Adjustment Function (AAF) of the pads to check for proper clearance. This function is a pad adjustment only and is preformed…