Hyundai Motor America is recalling specific Genesis G90 sedans due to a defect affecting the Highway Drive Assist system. The issue involves radar signal interference caused by exterior paint composition, leading to potential sudden unintended braking.
Highlights
- The recall affects 483 Genesis G90 vehicles from model years 2023-2026.
- Aluminum content in Savile Silver paint reflects radar signals, causing false object detection.
- Sudden braking can occur when Highway Drive Assist or Lane Change Assist is enabled.
- Dealers will replace the front bumper beam to prevent radar transmission issues.
Technical Defect and Root Cause
The subject vehicles are equipped with Highway Drive Assist (HDA), a system facilitating semi-autonomous driving under driver supervision. The defect manifests as false detection of another vehicle entering the lane of travel.
This false detection triggers brake application without warning. The system logic failure occurs when HDA is active at speeds below 12 mph or during Lane Change Assist (LCA) operations initiated by the turn signal.
Hyundai’s investigation identified the root cause as specific to the Savile Silver exterior color (paint code SSS). The high aluminum content in this paint reflects signals from the front corner radar sensors.
These reflected signals pass through the front bumper beam and register as objects in the opposing lane, disrupting the HDA logic.
Operational Risks and Warnings
Sudden unintended braking significantly increases the risk of a crash while driving. Drivers may receive visual or audible warnings prior to or during the event.
- Visual Warning: The instrument panel will display an object when HDA is enabled.
- Audible Warning: An audible chime will sound if the driver activates the Lane Change Assist feature.
Scope and Incident History
The recall population includes 483 vehicles produced between April 21, 2022, and October 13, 2025. Hyundai estimates that 1% of this population possesses the defect.
The investigation began following a February 2025 field report regarding false vehicle detection. Testing confirmed the condition could only be replicated on bumper covers painted Savile Silver.
As of the filing date, Hyundai is aware of 11 unique reports of HDA false detection in the U.S. market received between April 2023 and April 2025. There have been no reported crashes, injuries, or fatalities related to this condition.
Remedy Program and Schedule
Genesis advises owners to refrain from using the HDA feature until the repair is completed. The remedy involves replacing the front bumper beam with a modified component.
The replacement beam is sealed to prevent radar transmission through the structure, mitigating the signal scattering caused by the paint. This service will be performed at no cost to the owner.
Reimbursement is available for owners who previously incurred out-of-pocket expenses for this issue. Dealer and owner notifications are scheduled for January 30, 2026.
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