Most common 2018 Genesis G90 problems
Share of the 16 complaints; one complaint can involve more than one system. "~" is the median mileage when the problem started.
Genesis G90 complaints by model year
Best G90 years: 2019, 2021, 2022. Compare all years →
2018 Genesis G90 recalls (4)
Engine and engine cooling › Engine › Gasoline › Turbo/supercharger
Hyundai Motor America (Hyundai) is recalling certain 2018-2020 Genesis G80, 2017-2022 G90, and 2019-2022 G70 vehicles equipped with a 3.3-liter V6 turbocharged engine. The left turbocharger oil feed pipe may deteriorate and leak oil.
Remedy: Dealers will replace the left turbocharger oil feed pipe, free of charge. Owner notification letters were mailed May 3, 2024. Owners may contact Hyundai customer service at 1-855-371-9460.
Electrical system › Starter assembly › Solenoid
Hyundai Motor America (Hyundai) is recalling certain 2015-2016 Genesis, 2017-2019 Genesis G80, Genesis G90, and 2019 Genesis G70 vehicles. Water may enter the starter solenoid and cause an electrical short, which can result in an engine compartment fire while parked or driving.
Remedy: Owners are advised to park outside and away from structures until the recall repair is complete. Dealers will install a remedy relay kit in the engine junction box, free of charge.
Engine and engine cooling › Exhaust system › Manifold/header/muffler/tail pipe
Hyundai Motor America (Hyundai) is recalling certain 2018 Genesis G80 and 2017-2018 Genesis G90 vehicles equipped with 3.3 liter turbocharged engines. The turbocharger oil supply pipe may have a loose seal, causing oil to leak onto the exhaust manifold.
Remedy: Hyundai will notify owners, and dealers will replace the turbocharger oil supply pipe, free of charge. The recall began October 3, 2019. Owners may contact Hyundai customer service at 1-855-371-9460.
Visibility › Glass, side/rear
Hyundai Motor America (Hyundai) is recalling certain 2018 Hyundai Genesis G80 and Genesis G90 vehicles. The windshield and rear window on these vehicles may have been installed with incorrect primer, potentially reducing the glass bonding strength.
Remedy: Hyundai will notify owners, and dealers will replace the front and rear glass, free of charge. The recall began on July 6, 2018. Owners may contact Hyundai customer service at 1-855-371-9460.
What 2018 Genesis G90 owners say
Electrical system
On 01/16/22 at approximately 2305 hours, I was driving north on PA 743. I was traveling approximately 40 MPH in a posted 55 MPH zone due to snowy weather conditions. One adult was in the front passenger seat, 2 children were in car seats in the rear driver and passenger side. The road was level and straight. Suddenly, for no apparent reason, every warning light in the dashboard illuminated at once. The LED screen was rapidly displaying messaged such as, "blind spot monitoring system malfunction, smart BDS braking system malfunction, check smart high beam, check PSB, shifter malfunction, traction control malfunction, ESC malfunction, ABS malfunction, etc...". Immediately after traction control malfunctioned, the vehicle violently fishtailed, as if on the receiving end of a PIT maneuver, and crossed over the south bound lane. …
The contact owns a 2018 Genesis G90. The contact received notification of NHTSA Campaign Number: 24V107000 (Electrical System); however, the part to do the recall repair was not yet available. The contact stated that the manufacturer had exceeded a reasonable amount of time for the recall repair. The dealer was made aware of the issue and confirmed that parts were not yet available. The contact attempted to make the manufacturer aware of the issue; however, was unable to reach a representative. The contact had not experienced a failure. VIN tool confirms parts not available.
Engine & cooling
vehicle went dead. replaced the battery. Started after replacement but went dead a few days later. Towed to dublin CA genesis. Diagnosed as water corrosion to wiring harness. vehicle has less than 22000 miles, other than car washes and normal winter driving in CA. Genesis does have a recall for water intrusion NHTSA ID# 24v107000. I believe my issue is related to this recall but the dealership doesnt think so.
Tl* the contact owns a 2018 Genesis G90. The contact stated when stopped at a traffic light and attempting to accelerate, the vehicle hesitated for a few seconds before accelerating. The contact took the vehicle to the local dealer towne Hyundai (3170 nj-10, denville, nj 07834) however, the mechanic was unable to duplicate the failure or retrieve a fault code. The failure persisted. The manufacturer was notified of the failure. The failure mileage was 19,677.
2018 Genesis G90 engines & fuel economy
| Engine | Transmission | Drive | MPG city / hwy / combined |
|---|---|---|---|
| 3.3L 6-cyl turbo | 8-speed automatic | AWD | 17 / 24 / 20 |
| 3.3L 6-cyl turbo | 8-speed automatic | RWD | 17 / 24 / 20 |
| 5.0L 8-cyl | 8-speed automatic | RWD | 16 / 24 / 19 |
| 5.0L 8-cyl | 8-speed automatic | AWD | 15 / 23 / 18 |
EPA ratings. Class: Large car.
Frequently asked questions
Is the 2018 Genesis G90 a good car?
There isn't enough complaint history for the G90 to compare model years reliably. So far owners have filed 16 complaints with NHTSA.
What is the most common problem with the 2018 Genesis G90?
The electrical system — 5 complaints, 31% of all complaints for this model year. Next are the engine & cooling (4) and fuel & propulsion system (2).
How many recalls does the 2018 Genesis G90 have?
There are 4 recalls for the 2018 Genesis G90, the most recent from March 8, 2024 (turbo/supercharger). Recall repairs are free at any authorized dealer — check whether yours has been done with the VIN recall check.
What are the best and worst years of the Genesis G90?
The best years by complaints, compared at the same age, are 2019, 2021 and 2022. See the full Genesis G90 years comparison.
At what mileage do 2018 Genesis G90 problems happen?
The median mileage reported in complaints is about 6,000 miles; 100% of problems with a recorded mileage started before 50,000 miles.
Source: U.S. National Highway Traffic Safety Administration (NHTSA) — owner complaints through October 20, 2026, recalls and defect investigations; fuel economy from the EPA. Complaints are unverified reports and are not proof of a defect. How we rate model years.