2021 Genesis G-Class problems

“2021 Genesis G70 engine shutting off at stops, often linked to the Idle Stop and Go (ISG) system or, in some cases, unexpected stalls. Possibly the automatic transmission's calibration leading to rough stops, or needing to restart the car if the ISG fails to restart the engine upon releasing the brake. 2.24.26:The vehicle stopped running and would not restart a busy intersection which involves my safety and other drivers. This has happened a couple times and I have replaced the fob batteries several times just in case that was the problem. It has not been inspected because it was just involved in another incident yesterday and I have been only making it to work as I am afraid to drive it. The warning came up on the dash after the car shut off. The vehicle can be picked up and inspected at any time. I do not have another vehicle or rental option.”

“The centre console screen has completely failed and has gone black. Yes, the screen is available for inspection upon request. The screen houses access to most safety systems in the car, including the reverse camera, front camera, collision avoidance system settings, lane safety settings, blind spot monitoring settings etc. Lack of access to these systems makes driving the car less safe Yes, the problem has been reproduced by a Genesis dealer The dealer had the car for over 2 weeks but was unable to find any fault codes. They were unable to diagnose the root cause of the issue, and no fix was suggested The screen used to flicker once in a while before going blank. It did this for a few months, but always came back on. Since Dec 2025, the screen has gone blank permanently”

“Summary of Reported Behaviors Lurching: Commonly reported, often deemed a software/adaptive issue. Brake Issues: Commonly reported, often attributed to pad-to-rotor deposits, or in some cases, the recalled ABS module. I started my car in my work parking lot. When I put into Drive the car lurched forward aggressively. I immediately applied the brakes and they pulsated but did not stop the car. My car continued moving forward across the parking lot and right over a large railroad tie. I am very afraid of driving the car. If someone were coming across the driveway they would have hit me or if someone was walking to their car I could have hit them. I have not driven the car again since the incident so no one has inspected the vehicle. The front collision warning started coming on the day before. I did not notice it on during this incident. This car is only 5 years old and I am now terrified to drive it!”

“(front) 245/40R20 (rear) 275/35R20 Rear passenger tire failed, sidewall failure. Instantly went to 0 PSI on dash notification. A cop helped us change it. Less than a mile layer going less than 50 MPH (max rating for spare) the front passenger tire exploded. The same cop caught up with us and could confirm that the front tire was there and was now gone.”

“My car stopped in the highway”

“My 2021 Genesis G90 has experienced repeated failures of the main infotainment / viewing display system, which has been replaced multiple times by authorized Genesis dealers. Despite these repairs, the defect continues to recur. On December 19, 2025, while the main display was nonfunctional, I was involved in a rear-end collision while proceeding from a stop at a traffic light. During this event, the vehicle did not provide any forward collision warning and did not engage autonomous emergency braking, despite the presence of a vehicle directly in front of me. I am concerned that failure of the main display system or its associated control modules disables, suppresses, or prevents proper operation or driver notification of Advanced Driver Assistance Systems (ADAS), including Forward Collision Warning, Forward Collision-Avoidance Assist, and Autonomous Emergency Braking. Due to the display failure, no visual warnings or system status messages could be seen, and there was no indication that collision-avoidance systems were disabled or degraded. The absence of both warnings and braking intervention raises serious concerns regarding system integration, fault…”