2023 Hyundai Sonata Reliability Score & Common Problems

Owners report several electrical system issues with the 2023 Hyundai Sonata, including stalling and loss of power. Complaints frequently mention the car shutting down unexpectedly, often during deceleration or when shifting to park, with some reports describing dashboard lights flashing and media screens blacking out. Multiple owners describe needing to restart the vehicle to regain function, and one report highlights battery discharge within ten days when parked, suggesting inadequate battery capacity for electronic systems. Safety implications arise as these issues occur while driving, posing potential risks of accidents. The problems appear to affect both new vehicles and those with minimal mileage, as indicated by owners who report issues soon after purchase.

Owners of the 2023 Hyundai Sonata frequently report issues related to the fuel system, with several complaints highlighting problems such as swollen fuel tanks and faulty fuel injectors. Typical symptoms include illuminated check engine warning lights, unexpected deceleration or stalling, and abnormal fuel gauge readings. Mileage at the time of these issues varies, with some reports occurring around 5,000 miles and others as high as 75,000 miles. Safety implications are noted in cases where vehicles decelerate or stall abruptly, potentially leading to hazardous driving conditions. These patterns could be useful for potential buyers to consider, especially regarding the availability of parts for necessary repairs.

Owners report issues with the forward collision avoidance system in the 2023 Hyundai Sonata, particularly involving unexpected emergency braking. Complaints frequently mention the system activating without apparent cause while driving at highway speeds, leading to sudden deceleration and potential safety hazards, such as the risk of rear-end collisions. One owner notes the system's radar becomes obstructed by snow and ice, rendering it inoperable during adverse weather conditions. Additionally, there are reports of the adaptive cruise control behaving unpredictably, such as abrupt acceleration after braking when another vehicle changes lanes. These incidents typically occur at higher speeds, around 60-70 mph, and suggest potential safety implications for drivers and passengers.

Owners of the 2023 Hyundai Sonata report issues with vehicle speed control, including unintended acceleration and loss of acceleration. Complaints frequently mention sudden acceleration when parking, leading to crashes, as well as hesitation and deceleration while driving, sometimes resulting in a complete loss of speed. These issues are reported both shortly after purchase and after several weeks of driving. Two incidents involve crashes with one resulting in two injuries, highlighting significant safety implications. Buyers should be aware of these potential issues, particularly regarding the vehicle's response to accelerator input and the effectiveness of the braking system.

Owners report issues with the steering and associated safety features in the 2023 Hyundai Sonata. Complaints frequently mention a loss of power steering and other safety features, such as Lane Assist and Forward Collision Avoidance, particularly in cold weather. One owner describes the problem as recurring and resulting in swerving into oncoming or neighboring lanes. Another owner reports engine shaking and loss of power at around 9,500 and 19,000 miles, leading to an inability to steer the vehicle. Both instances involve safety concerns, with the vehicle becoming difficult to control, and the issue remains unresolved by the dealership.

Owners of the 2023 Hyundai Sonata report frequent brake issues, with one owner detailing the need to replace brakes four times within the first 40,000 miles. This owner also mentions replacing rotors once and resurfacing them, indicating potential premature wear of brake components. Another issue noted involves the calipers, which are on backorder, suggesting possible supply challenges. While no crashes or loss of control are reported, the repeated need for brake replacements could imply maintenance concerns for potential buyers. These complaints highlight the importance of monitoring brake system components closely when considering a used 2023 Hyundai Sonata.

Owners of the 2023 Hyundai Sonata report issues with water entering the rear left door and becoming trapped between the lower door seals. This results in water pouring out when the door is opened. Complaints frequently mention that this condition is described as common to the model by dealers, and attempts to address the issue with Hyundai have been unsuccessful. There are safety concerns noted, particularly the risk of ice formation in colder climates, which could prevent the door from opening in emergencies. This issue appears to be recognized by multiple owners and is acknowledged by both dealers and Hyundai representatives as a recurring condition.