Hyundai Elantra collision warning problems

Filed Sep 24, 2026 · Driver assistance · CA

Hyundai's forward collision warning light is on and won't allow me to use cruise control. I've tried cleaning the area, but still won't turn off. It did turn off for about an hour and while on the freeway using cruise control it came back on.

Filed Sep 14, 2026 · Airbags, Driver assistance · PA · crash · 2 injuries

My 2026 Hyundai Elantra at 3,300 miles experienced a severe frontal impact with 6g logitudinal deceleration due to uncommanded acceleration and complete brake blindness. Depiste this severe impact, neither airbags nor seatbelt pretensioners deployed. At -2.5 sec. prior to impact, the Forward Collision Avoidance Assist data drops off and goes completely silent. There were no warnings or alerts on the vehicle instrument cluster. This proves catastrophic CAN-bus network crash. Because the network crashes, the engine control unit (ECU) became digitally blind and incapable of registering the driver's physical brake applications. EDR telemetry captured erractic signal cascade from -1 sec to 0 sec impact. The accelerator pedal jumped to 70%, dropped to 0% at -0.5sec and teleported to 100% at 0 sec while the engine RPM increases from 2100 to 2400. No human foot can physically strobe a pedal from 70% to 0% and back to 100% in 0.5 sec while the engine RPM steadily increases. Hyundai deceptively using data generated by a glitched, crashed system to blame driver error and evade product liability. Hyundai even claimed non-deployment of airbag system was "appropriate" at 6g longitudinal deceleration for a frontal impact. Damages to the vehicle was estimated at $10,254.67 by State Farm Ins. Police report confirmed via traffic camera footage that my car stopped at a solid red light behind another vehicle, then it suddenly moved forward, just as the driver described. The driver's foot was phyically on the brake pedal, the engine revved up, the car moved foward on its own and crashed into the vehicle in front despite the brake pedal was depressed throughout the entire episode.

Filed Sep 2, 2026 · Brakes · LA · crash · 5 injuries

Braking system failed to brake properly. It feels like even though the brakes were pressed all the way down, the car did not brake as it should. Also, the automatic collision avoidance system did not respond.

Filed Aug 18, 2026 · Driver assistance · CA

Logic board failure part number 99211-F2000 leading to inoperable lane keeping assist and forward collision avoidance.

Filed Jul 3, 2026 · Driver assistance, Electrical · TX

I have a 2020 Hyundai Elantra Limited that was purchased new in December of 2020, has 17,764 miles, and no damage. At the end of May/early June of 2026, the car gave warning messages for the following: check forward collision avoidance assist system, check lane keep assist system, and check high beam assist system. The car was inspected by the dealership, from which it was purchased, on June 29, 2026. The technician report says error codes C1604 and C1606 were found and that the car required replacement of the front camera system at the cost of $1991.49. Front camera failure negates the ability to use the advanced safety features of this car. These features are so important to alert and, more importantly, assist the driver avoid accidents and improve all motorists safety. I have read numerous complaints depicting the same problem with this front camera system. Hyundai issued TSB 20-BE-006H due to multiple problems just like the one that happened to me. I have corresponded with Hyundai about this situation and my concerns on why a car with this few miles and no damage had a failure of this magnitude. They are unwilling to assist due to the warranty expiring 6 months ago. For components this important to the safety of all drivers, I would like to see a recall established to hold Hyundai accountable for faulty components. Safety should not be limited by a warranty and last longer than 5 1/2 years. Than you for your consideration.

Filed Dec 22, 2025 · Driver assistance · NY

I randomly get warning lights that my camera is disabled for Lane Departure Warning, Blind Spot Warning, Forward Collision warning, Lane Assist Warning. Each warning message I get comes one after the other stating CAMERA disabled. After a few minutes of driving, all the orange lights disappear and it seems to reset itself to normal. This has happened on three random occassions. I took it immediately to Hyundai of Bay Ridge but they said they were not able to duplicate the problem. I also mentioned to them that my dashboard and Infotainment system constantly dims then brightens for no reason whatsoever. Sometimes, it dims for two seconds, then goes bright again, sometimes it dims for much longer. This happens everyday and it doesnt matter if it is a bright sunny afternoon or an early morning. It constantly dims then brightens. The dealer keeps saying they can't find anything wrong because diagnostics shows everything is ok with their computer. I feel like they are simply sweeping this under the rug because it is a leased vehicle and I am concerned for my safety should I suddenly lose power.

Filed Dec 11, 2025 · Driver assistance · PA

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 happened to the previous owner as well. I bought it in 7/2025 and it happened driving it home from buying it, in 11/25, and 12/10/25

Filed Nov 9, 2025 · Acceleration, Driver assistance · MA

While driving in the rain, car reported "Check Forward Safety System". Error has not gone away multiple weeks later. Hyundai dealer's first reaction was "Oh yes, this happens all the time" (!!) but then refused warranty repair because car is in other than pristine condition, despite being only two years old, still under warranty, with pristine front bumper. Without this sensor, adaptive cruise control, collision warning system, and automatic emergency braking do not work.

Filed Sep 11, 2025 · Electrical · 110,000 miles · NJ

The contact owns a 2020 Hyundai Elantra. The contact stated that while his son was driving at an undisclosed speed, the Lane Assist safety feature failed to function as intended. The messages “Forward Collision Avoidance”, and “Lane Assist Camera Disabled” were displayed. The vehicle was taken to a local dealer, where it was diagnosed, and determined that the Forward Collision Avoidance and Lane Assist Camera needed to be replaced. The vehicle was not repaired because the warranty was invalid. The manufacturer was made aware of the failure. The failure mileage was approximately 110,000.

Filed Jun 15, 2025 · Driver assistance, Electrical · GA

This is a repeat incident. While driving, the speedometer stops working, tachometer, all of the collision warning systems start going through a self test, the check engine light comes on, and most concerning is the power steering. It becomes heavy, as if it is working at half power. The dealer kept the car for over a week recently, and they said that they were unable to duplicate the issue. It happened again while I was on a road trip , and I stopped by five star Hyundai in Albany ga. The service advisor was aware of similar issues have occurred on Hyundai's, but that they were too busy to look at it. She wouldn't even come out of the building to look at the car and wasn't interested in looking at my video. I tried to upload video to this form, but was unable to do so