2018 Genesis G80

After 2 hours on the road August 1, 2026 (from [XXX] to [XXX]), in 119-degree heat, the AC stopped blowing cold air out of the dash vents. There was cold air coming out of the rear-seat vent. The vehicle became unbearably hot. (Took my wife 2 days to recover from heat exhaustion.) The AC started working properly after the car sat for a few days in [XXX]. The Genesis Escondido service shop has not been able to duplicate the problem. The vehicle is still there at the shop. Genesis Customer Care assigned a case # XXX, but are unwilling to buy the car back, or do anything else except contact Genesis Escondido service dept. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Dear NHTSA Office of Defects Investigation, I am submitting this letter to request an urgent review of a recurring and widespread air‑conditioning failure in the 2018 Genesis G80. The AC system consistently shuts off after extended driving and does not cool down when the car starts, especially in high‑heat environments In Texas, cabin temperatures can exceed 120°F, creating conditions that can lead to heat exhaustion or heat‑related illness. This is not an isolated incident. Many owners have reported identical symptoms: AC cooling stops after prolonged operation, airflow continues but without cooling, and the system only resets or thaws after the vehicle sits for an extended period. Despite these repeated complaints, no investigation or recall has been initiated. While AC failure is typically categorized as a comfort issue, the extreme heat exposure caused by this defect presents a legitimate safety concern. Occupants may become ill, visibility can be affected by humidity and fogging, and the failure appears to be tied to HVAC components that may not be functioning as designed.I respectfully request that NHTSA open a defect investigation into this issue to determine whether a safety recall is warranted. Thank you for your time and consideration.

The contact owns a 2018 Genesis G80. The contact stated that the Check Oil and Low Oil warning light illuminated while the vehicle was idling. The warning lights turned off while driving. The vehicle was not taken to the dealer or an independent mechanic to be repaired. The manufacturer was not informed of the failure. The failure mileage was approximately 72,200.

⭐ 1. The Airbag Control Unit (ACU) and associated restraint‑system components appear to have malfunctioned. The Event Data Recorder shows inconsistent airbag deployment staging, a pretensioner firing while the belt was recorded as unbuckled, a seat‑track sensor fault, unsupported occupant‑classification data, incomplete curtain‑airbag deployment during rollover, and missing crash‑event data. Yes, the vehicle and the full 29‑page EDR report are available for inspection upon request. ⭐ 2. The restraint system did not protect the occupants as expected. I suffered chest injuries from hitting the steering wheel, and my passenger sustained injuries to their hand and arm. These injuries occurred because the driver airbag did not deploy correctly, the pretensioner logic was inconsistent, and the curtain airbags did not deploy on the driver side despite multiple full vehicle rotations. The system’s irregular behavior increased the risk of serious injury or death. ⭐ 3. No. The issue occurred during a crash event and cannot be safely reproduced. However, the malfunction is confirmed by the vehicle’s own Event Data Recorder, which documents the deployment irregularities, sensor faults, and data‑integrity issues. ⭐ 4. The vehicle was inspected by insurance representatives after the crash. The manufacturer has not performed an engineering‑level inspection of the Airbag Control Unit or restraint‑system logic. The EDR report was obtained through the insurance process and serves as the primary source documenting the malfunction. ⭐ 5. No warning lamps or messages appeared prior to the crash. There were no symptoms indicating that the airbag or restraint system would malfunction. The failures were only discovered after reviewing the Event Data Recorder.

The contact owns a 2018 Genesis G80. The contact stated that while driving at an undisclosed speed, the contact's vehicle was involved in a crash. The contact stated that the vehicle crashed into a deer, and then crashed into a hill. The vehicle spun around three times and rolled over after crashing into the hill. The front driver's air bag did not deploy. The contact stated that no warning lights were illuminated. A Police report was filed. The contact sustained bruises to the chest and back pain. The passenger who was seated in the front passenger's seat sustained bruises. No medical treatment was provided at the scene of the crash, however the contact later visited her primary physician. The vehicle was towed to the contact's family members' residence and later towed to the contact's residence. The insurance inspection confirmed that, according to the EDR, the front diver's air bag skipped stage one. In addition, the contact was informed that an unknown recall had been initiated for the front passenger's air bag for the vehicle. The manufacturer was made aware of the failure but provided no assistance. The contact was informed that the aftermarket seat covers were the cause of the steering wheel's functionality not functioning as intended. The contact was informed that the aftermarket seat cover was the cause of the driver's side air bag not deploying. The contact stated that the seat covers were purchased after the crash to cover the damaged seats as a result of the crash. The failure mileage was approximately 126,000.

When operating the headlights in auto dim mode and the headlights are bright, when I try to dim the headlights manually using the dimmer switch, the headlights go out completely. When operating the headlights with auto dim mode turned off and the headlights are bright, when I try to dim the headlights manually using the dimmer switch, the headlights will not dim. This places myself and oncoming traffic at risk by them either being blinded by the high beams when I'm unable to dim or me hitting them or another object when the lights go out completely when I try to dim them. I reported this to the local dealer who mentioned similar issues on model years prior to mine which were sold under the Hyundai Genesis branding. I will note that the Hyundai Genesis model and my Genesis G80 model use the same platform.....the cars are identical except for the branding. The Hyundai Genesis model referenced had a recall for this issue, so I don't understand why the same recall hasn't been issued for the Genesis G80 model, which is having the same safety issues.

I WAS IN A ACCIDENT SEVERE ENOUGH TO DEPLOY ALL AIR BAGS BUT MY STEERING WHEEL, I WENT TO GENESIS WITH THE ISSUE AND THEY INSPECTED THE CAR WHEN THEY EDR REPORT CAME BACK EVERYTHING MATCHED BUT THE MODEL OF THE CAR IT COMES BACK TO A GV80, ON MY GENESIS APP MY CAR COMES BACK AS A G90, MY CAR IS A GENESIS G80 THE MATTER CONCERNS CONFLICTING VEHICLE INDETIFACTION DATA ACROSS MULTIPLE OFFICIAL GENESIS SYSTEMS AS WELL AS A FAILURE OF THE AIRBAG TO DEPLOY DURING A CRASH. TWO IDENPENDENT GENESIS SYSTEMS - THE EVENT DATA RECORDER EDR AND THE OFFICIAL GENESIS OWNER PORTAL ARE IDENTIFYING MY VEHICLE AS A DIFFERENT MODEL A GENESIS GV80 AND G90 DESPITE MY CAR BEING A G80. THESE SYSTEMS SHOULD NEVER DISAGREE ABOUT THE VEHICLES IDENTITY AS THEY ARE RESPONSIBLE FOR SAFETY CRITICAL INFORMATION CRASH DATA WARRANTY TRACKING AND RECALL ELIGIBILITY.. THE EDR BOX SHOWING THE INCORRECT MODEL IDENTIFACTION .. THIS IS A MAJOR DEFECT DATA MISCLASSIFICATION AND A SAFETY SYSTEM FAILURE THAT CALLS FOR A RECALL

The contact owned a 2018 Genesis G80. The contact stated that while driving at an undisclosed speed during the night, a deer hit the contact's vehicle on the front passenger side. The vehicle spun around and ended up in a "grass hill" where it came to a stop. The driver-side air bags did not deploy. However, the front passenger and side curtain air bags were deployed. The front passenger-side control arm detached from the vehicle due to the impact. The police were called and filed a police report. The contact and the passenger were not injured. The vehicle was towed to the residence. The contact took the vehicle to the dealer. The manufacturer was notified of the failure, and a field inspector from Genesis stopped by the Hyundai dealer to retrieve the Event Data Recorder (EDR). The inspector informed the contact that the Event Data Recorder (EDR) showed that the contact's vehicle was a GV80. The contact stated that her vehicle is a G80. The field inspector then requested permission from the contact to retrieve the information from the Event Data Recorder (EDR) to change the vehicle information to a G80. The contact refused. The contact stated that the Genesis application on the contact's phone provided the following codes: B1378, which meant that the "Side Airbag Front-Driver Resistance is too High," and B1649, which meant "Crash Recorded - Rollover Event." The dealer replaced the control arm. The air bags were still deflated. The vehicle is at the contact's residence. The insurance company was informed. The failure mileage was approximately 127,000.

I am writing to formally report a serious safety defect in my Genesis vehicle and to request immediate investigation, documentation, and corrective action. Following a recent crash event, my vehicle’s diagnostic scan revealed DTC B1378, which is associated with a fault in the airbag system circuitry. This code is widely recognized as an indicator of an airbag defect and is consistent with conditions that warrant manufacturer recall. During the crash: - Multiple airbags deployed, - The steering‑wheel airbag did NOT deploy, - The SRS system recorded a crash severe enough to trigger other airbags, - The vehicle now displays B1378, confirming an internal fault. The failure of the primary driver airbag to deploy during a crash is a critical safety malfunction. Combined with the presence of B1378, this raises substantial concerns regarding a defective airbag module, wiring harness, or sensor — all of which fall under manufacturer responsibility and federal safety standards. I am requesting the following: Immediate corrective action, including repair or replacement of all defective components. Documentation of this issue in your internal safety‑defect tracking system. Given the severity of this failure and its implications for driver safety, I am also submitting this information to the National Highway Traffic Safety Administration (NHTSA) for review. Please confirm receipt of this letter and provide a written response outlining the next steps. Sincerely, [XXX] Hagerstown, MD --- INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)