2021 Hyundai Elantra forward collision avoidance problems
32 owner complaints filed with NHTSA name the forward collision avoidance on the 2021 Hyundai Elantra — 25% of all complaints for this model year.
What owners report
“The Forward collision warning light comes on randomly at times and disables the system. It’s done this on 3 occasions. No one has inspected the vehicle. I was told everything was normal. No injuries involved. The problem has occurred 3 times now with code c1620078. The history codes show this has…”
filed Dec 11, 2025
“Forward sensors in vehicle have been failing while driving rain or snow since 2021; would go way on its own. Most recent failure has occurred with no debris or obstruction to sensor on a clear and sunny day. The sensor failure has been stagnant and will not go away, increasing a safety concerns…”
filed Sep 19, 2025
Verbatim excerpts from complaints filed with NHTSA. Reports are not independently verified.
Related service bulletins
Some 2019MY and newer vehicles equipped with a front view camera may illuminate certain warning lights and trigger DTC C272246 fault code for the front camera. In the following cases, the front camera auto-calibration…
26-AD-001H TSB · Service Bulletin/Repair Instructions · issued Feb 25, 2026
Forward Collision Avoidance problems in other Elantra years
| Year | Reports | Share |
|---|---|---|
| 2025 Elantra | 3 | 14% |
| 2024 Elantra | 8 | 15% |
| 2023 Elantra | 19 | 21% |
| 2022 Elantra | 16 | 16% |
| 2020 Elantra | 13 | 5% |
| 2019 Elantra | 6 | 2% |
| 2018 Elantra | 1 | 0% |
| 2017 Elantra | 3 | 0% |
| 2016 Elantra | 1 | 0% |
| 2015 Elantra | 1 | 0% |
| 2014 Elantra | 1 | 0% |
| 2013 Elantra | 8 | 1% |
Other reported problem areas on the 2021 Hyundai Elantra
Counts are unique NHTSA complaints naming this component group. Complaints are unverified owner reports; mileage is computed only from complaints that included a usable odometer reading.