Component Failure I was driving on [XXX] in [XXX] at 70 miles per hour. My red oil indicator light came on, and within seconds the vehicle suffered a catastrophic power loss. I had zero control of the propulsion. I was in the right lane and managed to steer to the shoulder. I contacted Hyundai Roadside assistance/Hyundai care. They sent a wrecker in about an 45-1 hour as I sat on the side of the highway. I was then put into a wrecker and my car was loaded on a flatbed truck and we then took a 45 minute drive to [XXX] to Weisner Hyundai where the vehicle was left for diagnostic testing. Safety My safety was undeniably at risk due to going the speed limit to zero in seconds. It put me in harms was due to other drivers on the road not expecting a car to stop at those speeds, unable to react in time without causing a collision which could have resulted in significant bodily injury or death for myself, my passenger and possible many others on the road that were around me. I was afraid, not sure what had happened, very distraught and traumatized. I fear for my safety in this vehicle. Service Center The car was taken to Weisner Hyundai at this time they have been unable to replicate or discover any code. They have seen the oil light come on. They have had my vehicle since XXX until today XXX when they were going to send it to [XXX] Hyundai where I purchased the vehicle. Inspections I am not sure about who all has looked at it within the dealership. Warnings The only warning I had was a red oil lamp that appeared on the dash seconds before the catastrophic loss of power. Special Note, I just found out that my vehicle originally had repairs done as it came from transport to the engine/oil components which were not disclosed to me by the dealership prior to me purchasing the vehicle "new" at full price. The dealership had knowledge that the vehicle already had issues that cause the malfunction and sold it knowing the dangers. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Source: NHTSA complaint ODI #11758112 · view all complaints for this vehicle at nhtsa.gov

"take a coffee break" warning goes on an inappropriate amount of time. When I drive straight down the highway it alarms. However, if i cross the white lines it does not alarm. Also when this alarm turns on all other sounds systems in the car go silent including the GPS/Apple Carplay. I have missed exits and turns due to this alarm going off. There is no way to turn it off or make it less sensitive. I consider this alarm to be unsafe and annoying.

Source: NHTSA complaint ODI #11762602 · view all complaints for this vehicle at nhtsa.gov

Please keep in mind that I am not a mechanic and only a consumer so my specific knowledge of vehicle systems is limited. The vehicle is available for inspection upon request. On July 9, 2026 while reversing out of my sloped driveway my Hyundai Santa Fe Calligraphy Hybrid conducted a sudden, uncommanded emergency brake stop without warning or cause. This occurred one week prior as well on an unknown date. The system appears to misinterpret the angle of the incline and encroaching tall vegetation as a solid obstacle. This uncommanded malfunction caused a rapid deceleration that directly caused and exacerbated my post concussive syndrome, cervical strain, occipital neuralgia, hyperacusis, and noxacusis, requiring treatment at an Urgent Care clinic on Saturday July 11; the unresolved defect poses an immediate crash and bodily injury hazard. I am going to also need pain management therapies. I attended an appointment at the McGrath Hyundai of Cedar Rapids on Monday July 13 for assistance with this among other things that were occurring with my vehicle. I also have been reported experiencing an interconnected systemic electrical failure, including dashboard cluster loading lag, a complete failure of the Head-Up Display (HUD) to register speed limits, and intermittent green color distortion on the blind-spot turn signal camera display, which shares the camera network used by the reversing safety systems. These issues began around the same time as the sudden emergency braking. I am unsure if they are related however it would make sense. They did not fully conduct the tests necessary to locate the problem as a simple diagnostic scan will not do that. The sensor calibration might be off among other causes. The dealership did not look at the EDR to determine the history of this emergency stop occurring. I am currently working with a Hyundai Corporate investigator whom their team agreed for my vehicle to be inspected by a field engineer. I am currently awaiting their call.

Source: NHTSA complaint ODI #11759180 · view all complaints for this vehicle at nhtsa.gov

Depending on the angle of the vehicle and the sun, around the heads up display the sun will reflect off of the plastic causing a thick bar of light on the windshield. This can make it very hard to see while driving and is right in the line of sight. Brought the car to the dealership and was able to reproduce it under the right conditions with another vehicle of the exact same model. In attached photos, it shows the glare in 3 different spots. It's all depending on the angle of the sun and vehicle but it's all across the heads up display.

Source: NHTSA complaint ODI #11751222 · view all complaints for this vehicle at nhtsa.gov

The Driver Attention sensor cannot be turned off. In a recent trip it engaged a dozen times over a one hour ride, a ride I was completely fully alert for. I find the warning itself to be a safety issue and very distracting while I'm trying to drive and follow a map to have it constantly be going off. A simple software update to provide ability to turn it off would resolve this and there are hundreds of similar complaints about this that I can find in message boards. Unacceptable.

Source: NHTSA complaint ODI #11762605 · view all complaints for this vehicle at nhtsa.gov