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.

⭐ 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.

Component: Engine / Turbocharger / Oil Line / Fire Risk Vehicle Problem: For the past five months, my oil light has been coming on and off sporadically (not flickering), even though mechanics and oil shops said there was no issue. A few days ago, the car started smoking out of nowhere, though it wasn’t overheating and there were no visible signs of leakage. I took it to the shop, and they diagnosed a turbocharger oil supply pipe leak that is severe and poses a fire risk. I am in a new city with no support system and have a baby. Multiple car dealerships have refused to fix my vehicle, even though I have been informed this part is under recall. I have tried calling and visiting, and no one will help. This is a safety concern, especially since the vehicle is at risk of catching fire while driving.

My 2018 Genesis G80 has an issue in which the A/C quits working and blows warm air on the driver's side. I live in Florida where the heat is stifling and having warm air blowing during the high temperatures is dangerous. I have contacted Genesis who sent me a $220 Gift Card to have the dealer diagnose the problem. The dealer stated that this is a very common problem that Genesis will not acknowledge. My car only has 28,385 miles on it and is stored in a garage most of the time. I was told it needs a new evaporator coil which will cost $3,000. I am [XXX] and my husband is dealing with [XXX] I joined the Genesis G80 online forum and found that I am one of MANY people suffering with this problem. As the temperatures have already started to rise in Florida, I was struggling today as I drove to visit my husband in the hospital. I cannot go on much longer like this. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

Whenever I drive long distance like 1 or more hours, AC has problem. It worksd fine in short local distance. I see a lot of drivers have the same issue if you click the link below. During the hottest season, it can become very dangerous. I live in San Angelo, TX, and there is no Genesis dealership in here. Hyundae dealership couldn't figure it out. The nearest Genesis dealership takes 3 hours from my house. I paid for extended warranty which will expire within 4 months, and its useless unless it can get fixed. [XXX] (It's not a easy fix to Genesis service.) Please help me to resolvbe the issue. INFORMATION REDACTED PURSUANT TO THE FREEDOM OF INFORMATION ACT (FOIA), 5 U.S.C. 552(B)(6)

The vehicle started smoking Dec 2023. Placed it in the shop and got a diagnostic finding out about the turbocharge oil pipe leak. Two days after I got the car out the shop a recall was issued for the turbo oil pipe Genesis recall 019G. Called Genesis corporate office and the case worker says it’s nothing they can do due to me being the 2nd owner and my vehicle is a fire hazard smoking , shutting off while coming to a stop or reversing. I have a car note and have not been able to drive my vehicle in 3months. This is an big inconvenience and genesis isn’t trying to accommodate me for my trouble. t

ongoing problem with vehicle AC been to dealer 10 times for repair but problem persist. AC stops blowing cold air or has minimal blowing pressure after several hours of driving. sometimes a noise behind the glove compartment like something knocking. seems like system freezes as it will operate normally/properly after vehicle has been stopped for about30-45 minutes 1st issue occurred 3/24/21at 24143 miles and continues to occur when vehicle is driven long distance with AC running