Hyundai Elantra 2021–2022 — technical service bulletin
Bulletin 24-BE-005H · NHTSA communication 10252366 · issued Mar 20, 2024
Technical service bulletin
communication type
Forward Collision Avoidance
component
2021–2022
model years
2
vehicle entries
Official summary
Certain 2021~2022MY Elantra (CN7/CN7A) vehicles may exhibit a warning light with DTC C1620, caused by a distorted signal due to internal contamination of the front radar reception antenna. Customers may also report other systems related to the front radar being inoperative, such as Smart Cruise Control (SCC) or Forward Collision-Avoidance Assist (FCA). Other functions of the Advanced Driver Assistance System (ADAS) are not affected. Follow the procedure in this bulletin to replace the affected front radar unit and perform all related adjustments according to Shop Manual instructions.
Vehicles covered
What a TSB means. Technical service bulletins are repair guidance manufacturers send to dealers — they are not recalls, and repairs are not automatically free (warranty extensions are an exception worth checking). The full document is available via NHTSA’s vehicle lookup.