2023 Genesis G90 Problems: 9 Known Issues

On the 2023 Genesis G90 3.5L twin-turbo GDI V6, on the 2023 G90, the front driver, front passenger, and rear seat-belt pretensioners can over-pressurize when they deploy in a crash. The micro-gas-generator pretensioner pipe may rupture, causing abnormal deployment that sprays metal fragments into the cabin and risks injuring occupants. This is the same defective pyrotechnic pretensioner family behind a broader Genesis/Hyundai action; the G90-specific slice is NHTSA recall 23V210 (Genesis campaign 013G), covering roughly 575 units built April 21, 2022 through February 21, 2023. It is a restraint-system safety defect entirely separate from the electrical, fuel, and drivetrain issues catalogued elsewhere. At filing, Genesis was not aware of any real-world abnormal deployment incidents.

On the 2023-2026 Genesis G90, on second-generation G90s, the driver and front passenger seat belts attach to the seat frame through a snap-on anchor that can break, so the anchor does not securely fasten the belt to the structure. If the anchor separates in a crash the belt cannot restrain the occupant, which defeats the restraint entirely at the moment it matters. This is a different defect from the earlier pretensioner over-pressurization problem - nothing ruptures or fires here; the load path simply comes apart at the seat-frame end. Hyundai and Genesis covered roughly 294,000 vehicles across several nameplates in this action, with the 2023-2026 G90 among them, so late-model and current cars are in scope.

On the 2023-2026 Genesis G90 3.5L Twin-Turbo V6 (Smartstream), on G90s painted in Savile Silver (paint code SSS), the aluminum content in the bumper-cover paint reflects the front corner-radar signal, which then passes through the front bumper beam and is registered as an object. Highway Drive Assist (HDA) interprets it as a vehicle cutting into the lane and applies sudden, unintended braking — reported at low speed (below ~12 mph) and when Lane Change Assist is active. Only Savile Silver cars are affected. Covered by NHTSA Recall 25V833 (Genesis campaign 030G, 483 U.S. vehicles).

On the 2023-2025 Genesis G90 3.5L twin-turbo GDI V6 (Lambda III), on the second-generation 3.5L twin-turbo G90, the retention fasteners on the fuel crossover pipe at the fuel-rail connections were tightened during assembly with an insufficient concentration of thread/torque stabilizer (thread retainer). Over time the fasteners can gradually loosen, allowing gasoline to seep from the crossover pipe joints. Fuel leaking near hot engine components creates an engine-fire hazard. This is a manufacturing/assembly-torque defect covered by NHTSA recall 26V229 (Genesis campaign 033G). It affects 4,231 G90 units within a larger ~94,760-vehicle Genesis action (G80/GV80/GV70 also covered), part of a combined ~235,000-unit Kia-Genesis fuel-leak action. It is a fuel-delivery-rail failure distinct from the low-pressure fuel-pump impeller recall and the turbo oil-feed-pipe fire recall.

On the 2022-2023 Genesis G90, per NHTSA Recall 24V282000 / Genesis 022G, low-pressure fuel pump assemblies in ~1,364 G90 sedans (2022-2023 MY, built Jun 2, 2021 - Sep 14, 2022) may contain impellers that deform under high ambient/underhood temperatures, causing mechanical interference with the pump housing and shutdown. Affects both 1st-gen (3.3T Lambda / 5.0L V8) 2022 G90s and 2nd-gen (3.5T Smartstream) 2023 G90s. The recall lists two G90 pump part numbers: 31110-D2000 and 31110-T1050.

On the 2023-2025 Genesis G90, a software bug supplied by LG Electronics in the digital instrument cluster causes the entire IP display to go blank at startup on 2023-2025 G90s built Apr 21, 2022 - Apr 7, 2025. With no speedometer, warnings, or system status visible, the condition violates FMVSS 101. Genesis recall 027G (NHTSA campaign 25V474) covers 2,345 G90 units (part of a 4,754-vehicle total with GV60).

On the 2017-2023 Genesis G90, owners across model years report the 12V battery going flat after the car sits a few days. A common documented culprit is the radio/head unit continuing to draw current after shutdown, along with other parasitic draws that exceed the normal <50 mA key-off current. Leaving the key fob near the car can compound it. Frequent deep discharges shorten battery life and can leave the car unable to start.

On the 2019-2024 Genesis G90, on rear-seat-package G90s - the Ultimate rear entertainment/executive rear seat configurations, and the second-generation 2023-plus cars - a rear screen and the rear seat adjustment controls on the same side can stop responding together. In a reported 2020 G90 Ultimate case, the left rear screen and left rear seat controls died while the right side kept working, with the harness running through the seat back and rear armrest; the cause was not confirmed (water from an earlier sunroof-frame leak or a connector left unplugged after headliner work were suspected). A 2023 owner reported the rear LED screen and UV lights failing and the repair taking three weeks because the technicians had to remove both rear seats, the tunnel and the rear console. It is not a safety defect, but it disables the feature set that most justifies the trim's price.

On the 2017-2023 Genesis G90, water vapor accumulates inside the sealed headlamp assemblies and condenses on the inside of the lens, most often on one side only and worst after rain or a car wash. Genesis's own lamp-condensation bulletin (TSB 23-BD-002G, which applies to all Genesis models) treats light fogging that clears with the lamps on as normal, but water pooling at the bottom of the lamp, water streaks, or condensation that remains after the lamps have been on for about 30 minutes points to a leaking assembly. Owners worry that moisture left standing can pit or discolor the reflector over time. Owners across the Genesis forums report the same behavior on multiple models, and dealers frequently deflect it as normal venting behavior until it is documented as persistent.