Problems · NHTSA complaints
2018 Genesis G-Class problems
Owners filed 115 complaints about the 2018 Genesis G-Class with NHTSA between Feb 2018 and Oct 2026. The most-cited component is electrical system (28).
Complaints
115
Filed with NHTSA
Crashes
9
Reported by owners
Fires
1
Reported by owners
Injuries
5
People reported injured
Deaths
0
Reported to NHTSA
Complaints by component
One complaint can cite several components
- Electrical system28
- Engine17
- Steering16
- Air bags10
- Wheels9
- Power train7
- Tires5
- Service brakes5
- Structure5
- Engine and engine cooling3
- Seats2
- Exterior lighting2
- Forward collision avoidance2
- Latches/locks/linkages2
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.
Data from NHTSA Complaints API · synced Nov 9, 2026NHTSA vehicle page
When complaints were filed
Does it get worse with age? Complaints per calendar year filed
13
13
6
11
7
12
26
12
15
View as table
| Model year | Complaints filed per calendar year |
|---|---|
| 2018 | 13 |
| 2019 | 13 |
| 2020 | 6 |
| 2021 | 11 |
| 2022 | 7 |
| 2023 | 12 |
| 2024 | 26 |
| 2025 | 12 |
| 2026 | 15 |
Mileage at failure isn’t a structured field in NHTSA complaint data, so we don’t chart it. Some owners mention it in their reports below.
Top problems in owners’ words
Verbatim from NHTSA complaints, newest first
Electrical system
28 reports4 crashes1 fire1 related recall
“This complaint is filed regarding an under-hood thermal fire incident and unauthorized modification involving a federally mandated safety recall for a 2018 Genesis G80 (VIN: [XXX]). To resolve a starting issue, technicians at Van Hyundai in [XXX], bypassed the standard ignition circuit and installed an un-fused manual starter bypass switch kit. This bypass directly conflicted with active NHTSA Safety Recall Campaign 24V107000, which requires a specific fused relay kit (Part 91950-DH15KQQH) to prevent engine fires. This unauthorized, un-fused modification caused a severe electrical short and a subsequent thermal fire incident under the hood. The fire physically melted and destroyed the recall component and adjacent wiring infrastructure. The dealership and corporate office are now refusing to fix the fire damage they caused unless I pay out of pocket. I request an immediate federal investigation into this hazardous repair practice that completely compromised a critical safety recall remedy.”
Engine
17 reports1 fire
“Failing oil pressure sensor which “blinds” the driver of the engines true oil levels. It occasionally causes the car to go into “limp” mode or stall which could cause unnecessary and unreasonable traffic safety hazards. This is a well known and documented critical safety defect by Genesis as they’ve already executed a recall for the issue in their home country / market of South Korea.”
Steering
16 reports2 crashes
“When negotiating a curve, the steering wheel sticks and does not return to center without the driver forcing the wheel back to the required direction. Instead of a smooth and consistent feeling when turning the wheel, the steering wheel feels "locked" until the driver's force breaks the steering wheel free. In addition, the steering wheel makes a faint but noticeable grinding noise when turned in either direction. No warning lights illuminate.”
Air bags
10 reports6 crashes1 related recall
“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…”
Wheels
9 reports
“TIRES DEVELOPED BUBBLES IN SIDE WALLS ON TWO TIRE. ALSO CAR WAS DIFFICULT TO CONTROL ON INTERSTATE HIGHWAYS FOR THE SPEED LIMIT. ALWAYS FIGHTING THE STEERING WHEEL TO STAY IN LANE. I AM 80 YEARS OLD AND THERE WERE MANY COMPLAINTS OF FLATS AND LOSE OF CONTROL THAT I DECIDED TO REPLACE ALL THE TIRES. I CONTACTED HYUANDAI AND ALSO CONTINNENTAL AND WAS GIVEN NO SATISFACTION.ON GOING COMPLAINTS ABOUT ROAD NOISE ON THE OLD TIRES AND THE NEW TIRES HAVE NOT BE RECTIFIED.. MECHANIC SAID LOW PROFILE TIRES ARE THE CAUSE OF BOTH. CAR WAS IN MOTION WHEN THE PROBLEMS OCCURRED”
Power train
7 reports1 crash
“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.”
Data from NHTSA Complaints API (owner reports, unverified) · synced Nov 9, 2026
Complaints are unverified owner reports to NHTSA and are not normalized for sales volume. One complaint can cite several components.