Hyundai Sonata Common Problems

ENGINE

Owners report that the 2018 Hyundai Sonata frequently experiences excessive oil consumption, often requiring additional oil every 1-2 weeks. Typical symptoms include illuminated check engine lights, misfiring, shuddering, and blue smoke from the exhaust. Many complaints note these issues beginning around 75,000 to 118,000 miles. Safety concerns are evident, with reports of sudden loss of power, engine seizures, and one instance of a crash. Additionally, four complaints involve fires, highlighting potential safety risks for prospective buyers.

Severity signals: 1 crash, 4 fire, 0 injury reports

ENGINE

Owners report excessive oil consumption as a prevalent issue with the 2019 Hyundai Sonata, often leading to low or no oil levels without warning lights. Complaints frequently mention engine misfires, stalling, and reduced compression in cylinders, with some requiring engine replacement. Many owners experience these problems around 32,000 to 150,000 miles. Safety implications are noted, including engine fires and one reported injury, highlighting the potential risk of engine failure while driving. Used car buyers should be aware of these issues, especially regarding the vehicle's maintenance history and warranty status.

Severity signals: 0 crash, 2 fire, 1 injury reports

ELECTRICAL SYSTEM

Owners report several recurring issues with the 2018 Hyundai Sonata's electrical system, including sudden loss of power and stalling, often accompanied by "hybrid system failure" warnings. These issues typically occur at various speeds and sometimes require towing, with some incidents happening as early as 19,000 miles. Complaints frequently mention problems with the starter and excessive oil consumption, leading to engine failures and costly repairs. Safety implications include instances of fires, one crash, and reports of the vehicle shutting down while driving, highlighting potential risks for buyers.

Severity signals: 1 crash, 3 fire, 1 injury reports

UNKNOWN OR OTHER

Owners of the 2018 Hyundai Sonata frequently report excessive oil consumption, often needing to add oil every 1,000 miles or less, with some mentioning engine damage and oil leaks. Complaints also commonly describe dashboard warning lights for hybrid system failures, which can lead to sudden power loss and stalling, particularly in hybrid models. Some owners experience these issues at various mileage ranges, with significant occurrences around 30,000 to 40,000 miles. Safety concerns are evident, with reports of engine stalls in traffic and at least one incident involving a fire. Additionally, multiple owners note problems with the vehicle's paint peeling, primarily the white finish, and issues with the panoramic sunroof coming loose. These patterns suggest potential risks for buyers considering a used model.

Severity signals: 1 crash, 2 fire, 0 injury reports

ELECTRICAL SYSTEM

Owners report frequent issues with the 12-volt battery in the 2021 Hyundai Sonata, particularly in hybrid models. Complaints frequently mention the battery dying unexpectedly, often requiring manual intervention to reset or jump-start the vehicle. This issue is noted across various mileage ranges, with some reports emerging as early as 59,850 miles. Additionally, multiple owners describe problems with the car shutting off while driving, which poses safety risks. There are also mentions of electrical failures affecting door locks and windows, with some reports of burning smells and potential fire hazards. These patterns suggest potential reliability concerns for prospective buyers, especially regarding the vehicle's electrical system.

POWER TRAIN

Owners of the 2018 Hyundai Sonata frequently report issues related to the powertrain, specifically involving engine failure and transmission problems. Common symptoms include the vehicle entering "limp mode," loss of engine power, stalling, excessive oil consumption, and engine misfires. These issues often emerge around 60,000 to 107,000 miles. Safety implications are significant, with reports of sudden loss of power, difficulty maintaining speed, and in one case, a crash due to unintended acceleration. Additionally, a fire incident is noted, though the specific cause remains unidentified. Buyers considering this model should be aware of these recurring issues and the potential for substantial repair needs.

Severity signals: 1 crash, 1 fire, 1 injury reports

UNKNOWN OR OTHER

Owners of the 2021 Hyundai Sonata frequently report issues related to electrical system malfunctions, with multiple complaints about dashboard warning lights activating simultaneously, leading to a loss of acceleration. Transmission and drivetrain problems are also noted, with some owners experiencing difficulty shifting gears or unexpected power loss. HVAC system failures, such as a broken component preventing proper defrosting, are reported as well. Safety implications include two reported crashes and five injuries, with incidents involving unintended acceleration and automatic emergency braking activation. Mileage and timelines vary, but several issues are noted shortly after purchase or within the first year of ownership. These patterns suggest potential safety risks and repair challenges for prospective buyers considering a used 2021 Sonata.

Severity signals: 2 crash, 0 fire, 5 injury reports

ELECTRICAL SYSTEM

Owners of the 2020 Hyundai Sonata frequently report issues with the electrical system, particularly involving the A/C blower motor and associated components. Many complaints describe the blower motor failing to operate, melting fuses, and wiring harness problems, often resulting in loss of HVAC functionality and defrosting capability. These issues typically occur intermittently and have been reported at various mileage points, with some owners experiencing them as early as 27,000 miles. Additionally, there are reports of starting issues, with vehicles failing to start in cold weather, and window regulator failures leading to stuck windows. Safety implications include one reported crash due to stalling at an intersection and potential fire hazards from melting electrical components.

Severity signals: 1 crash, 0 fire, 0 injury reports