2023 model year · 0+ owner reports · Updated April 2026
According to Au7o's analysis of 0+ owner reports, the 2023 Hyundai Sonata has 2 documented known issues, with 1 rated critical. The most serious is Front Radar / Forward Collision-Avoidance Warning Disabled by Sensor or Calibration Faults ($250-$2,200 repair). Across all issues, repair costs range from $250 to $2,200. DIY maintenance guides at au7o.io.
On the 2022-2025 Hyundai Sonata, owners have reported the Forward Safety system, Smart Cruise Control, and related ADAS features becoming unavailable with warning messages such as front radar blocked or forward safety system disabled. In some cases the problem appears after minor front-end work, bumper cover replacement, windshield service, or without obvious damage, pointing to radar alignment, sensor contamination, bracket movement, or module faults. This is well documented through owner complaints and Hyundai service information covering ADAS inspection and calibration procedures.
Inspect the front radar area for impact damage, loose mounting, water intrusion, debris, or non-OEM bumper/grille parts affecting radar transmission. Perform a full scan for ADAS faults and complete static/dynamic calibration per Hyundai procedure; replace the radar sensor or bracket if alignment cannot be achieved or internal faults are stored. After repairs, verify operation of FCA, SCC, and lane/driver-assist functions on a road test.
Parts and tips from 0+ owners who fixed this issue
On the 2022-2025 Hyundai Sonata, multiple owners of DN8-generation Sonata models report individual direct-injection fuel injectors failing, leading to cylinder-specific misfires, rough idle, hesitation, and flashing or steady MIL illumination. Reports are concentrated on the 2.5L Smartstream engine family and often involve one injector failing first, with some owners later replacing additional injectors. The issue is documented in owner complaints and forum discussions describing injector replacement as the corrective action.
Diagnose with a scan tool for cylinder-specific misfire and injector circuit/performance faults, then confirm by swap-testing, balance testing, or oscilloscope/current-ramp analysis. Hyundai dealers typically replace the failed injector and clear adaptations; if contamination is suspected, inspect fuel quality and rail/injector seals. If multiple injectors show abnormal flow or repeated failures occur, replacing the full set may reduce repeat visits.
Parts and tips from 0+ owners who fixed this issue
EXTERIOR LIGHTING:BRAKE LIGHTS
Hyundai Motor America (Hyundai) is recalling certain 2024 Hyundai Sonata vehicles. The software for the brake lights may cause the brake lights to flash and not illuminate properly. As such, these vehicles fail to comply with the requirements of Federal Motor Vehicle Safety Standard (FMVSS) number 108, "Lamps, Reflective Devices, and Associated Equipment."
POWER TRAIN:AUTOMATIC TRANSMISSION:FLUID/LUBRICANT:PUMP
Hyundai Motor America (Hyundai) is recalling certain 2023-2024 Palisade Tucson, 2023 Sonata, Elantra, and Kona vehicles. The electronic controller for the Idle Stop & Go oil pump assembly may contain damaged electrical components that can cause the pump controller to overheat.
FUEL SYSTEM, GASOLINE
Hyundai Motor America (Hyundai) is recalling certain 2020-2023 Sonata vehicles. A damaged check valve can allow air to enter the fuel tank, causing it to expand and contact hot exhaust components, melting the tank.
POWER TRAIN:AUTOMATIC TRANSMISSION
Hyundai Motor Company (Hyundai) is recalling certain 2021-2022 Santa Fe, Sonata, Veloster N, 2022 Santa Cruz, Elantra N, and Kona N vehicles. The vehicle's "fail-safe" limited-mobility drive mode may be impaired, when prompted by a transmission oil pump malfunction, which can result in a complete loss of drive power.
FUEL SYSTEM, GASOLINE:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS
Hyundai Motor America (Hyundai) is recalling certain 2021-2022 Santa Fe and Sonata vehicles equipped with 2.5L turbocharged engines. Fuel may leak at the pipe connection between the high-pressure fuel pump and fuel rail.
Enter your VIN at NHTSA.gov to check recalls specific to your vehicle.
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According to Au7o's analysis of 0+ owner reports, the 2023-2023 Hyundai Sonata has 2 documented issues. The most frequently reported are: Front Radar / Forward Collision-Avoidance Warning Disabled by Sensor or Calibration Faults, Fuel Injector Failure Causing Misfire, Rough Running, and Check Engine Light. Of these, 1 is rated critical and should be addressed promptly.
The 2023-2023 Hyundai Sonata has 2 known issues documented across 0+ owner reports. 1 issue is rated critical: Front Radar / Forward Collision-Avoidance Warning Disabled by Sensor or Calibration Faults. Prospective buyers should inspect for these issues and factor potential repair costs into their purchase decision. Regular maintenance following the manufacturer's schedule helps prevent many common problems.
Repair costs for known Hyundai Sonata issues range from $250 to $2,200, depending on the specific problem and whether you choose DIY or professional repair. The most critical issue, Front Radar / Forward Collision-Avoidance Warning Disabled by Sensor or Calibration Faults, typically costs $250-$2,200 to repair. Au7o provides step-by-step DIY maintenance guides that can help reduce repair costs.
Owners have reported the Forward Safety system, Smart Cruise Control, and related ADAS features becoming unavailable with warning messages such as front radar blocked or forward safety system disabled. In some cases the problem appears after minor front-end work, bumper cover rep… Repairs typically run $250-$2,200. Severity: high.
Multiple owners of DN8-generation Sonata models report individual direct-injection fuel injectors failing, leading to cylinder-specific misfires, rough idle, hesitation, and flashing or steady MIL illumination. Reports are concentrated on the 2.5L Smartstream engine family and of… Repairs typically run $350-$1,400. Severity: medium.
Content on this page was compiled with AI assistance using NHTSA complaints, TSBs, owner reports, and public automotive data. While we strive for accuracy, this information may contain errors. Always verify repair procedures and specifications with your vehicle's service manual or a qualified mechanic.
