This page covers 4 recalls, 16 owner complaints and EPA fuel economy for the 2018 Genesis G90.
18–20 mpg combined
11.8–13.1 L/100km
Large Cars
Fuel economy data from fueleconomy.gov (EPA / U.S. Dept. of Energy). Annual cost based on 15,000 mi/yr at 55% city driving and current fuel prices. MPG is U.S. gallons; L/100km converted. Ranges reflect the 4 tested variants for this model year.
Complaints filed for the 2018 Genesis G90 are spread across a small number of vehicles, with the electrical system drawing the most reports. Owners most commonly describe the vehicle losing power entirely, going completely dead, sometimes repeatedly even after a battery replacement. One recurring pattern points to wiring harness corrosion as the suspected culprit, with water intrusion cited in low-mileage vehicles. Engine complaints make up the second-largest group, though the reported details are thin across that cluster. A handful of powertrain concerns round out the picture. One isolated report describes the interior trunk release failing to operate, leaving the trunk unable to open from inside the compartment.
16
Total Complaints
1
Crash-Related
By System
The 2018 Genesis G90 has 4 recalls, with three of them posing a risk of engine compartment fire: oil leaking from turbocharger supply lines onto hot engine or exhaust components, and a starter solenoid that can short-circuit after water intrusion, even while the vehicle is parked.
All three fire-related issues apply to vehicles with the 3.3-liter turbocharged V6. The oil leak concerns involve the turbocharger's oil feed and supply pipes, which can deteriorate or develop a loose seal and drip oil onto hot surfaces nearby. The starter solenoid issue is separate in cause but similar in consequence, as water getting into the solenoid can trigger an electrical short that starts a fire without warning. The fourth recall involves the windshield and rear window, which may have been bonded with incorrect primer. Over time, that weakened bond can cause either pane to detach while driving, creating a crash hazard.
At a glance
What can fail
The left turbocharger oil feed pipe can deteriorate and leak oil in certain Genesis G80, G90, and G70 models with 3.3-liter V6 turbocharged engines.
What the fix does
Dealers will replace the left turbocharger oil feed pipe at no cost to you.
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Complaints are owner-reported and reflect individual experiences, not confirmed defects. They are distinct from recalls. Data sourced from the national vehicle safety complaint database. See trending complaints →
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
Water can seep into the starter solenoid and cause an electrical short, potentially starting an engine compartment fire while the vehicle is parked or being driven.
What the fix does
Dealers will install a relay kit in the engine junction box at no cost to prevent water from reaching the starter solenoid.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The turbocharger oil supply pipe seal may loosen, allowing oil to leak onto the exhaust manifold.
What the fix does
Dealers will replace the turbocharger oil supply pipe at no cost.
Summarized — see the official notice for exact wording, dates, and contacts.
At a glance
What can fail
The windshield and rear window may have been installed with incorrect primer, which can weaken the bond between the glass and the vehicle frame.
What the fix does
Dealers will replace the front and rear glass at no charge.
Summarized — see the official notice for exact wording, dates, and contacts.
