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Genesis · Luxury · 2023–2025 Custom Search

Genesis G90 RG3.5

Weaknesses, engine ratings and buying advice

★★★★★
3.0 / 5.0 · Based on 1 engine variants · How we rate

Engine Overview

The Genesis G90 RG3.5 is available with one engine variant at 379 hp.

3.5T · Petrol· 375 PS
2023 2025

3.5L SmartStream twin-turbo V6 — 375 hp, dual injection, twin-scroll turbos. The mechanical evolution of the G6DP with better fuel delivery and thermal management. More responsive than the 3.3T it replaces, smoother at idle, and the dual injection eliminates carbon buildup. Timing chain rattle from 20-30k miles on early production units — tensioner suspect. Turbo seal failures documented on 2024 models as low as 16k miles, with oil leaking from the right turbo. Same fuel pump recall as the 2.5T (2021-2023). CVVT phasers share architecture with older Hyundai V6 engines where longevity past 100k is questionable. Expected lifespan: 150-180k miles before major work.

  • !! Turbocharger Failure from 60,000 km

    Low oil warning at 16k miles leading to turbo replacement documented on 2024 models. Oil leaking from the right turbo with significant acceleration loss. Multiple reports suggest turbo seal failures on early production 3.5T engines. Warranty-covered on current models.

    Symptoms: Low oil warning, blue/white smoke, acceleration loss, turbo whine
    2,000–5,000 $
    Ad turbocharger G6DS 3.5T Genesisturbo cartridge 3.5 twin turbo GV80
  • !! ITMS Overheating (Thermal Management) from 80,000 km

    Same Integrated Thermal Management System issues as the 2.5T. Software glitches cause false overheating warnings or actual overheating from valve failures. The twin-turbo V6 generates more heat, making ITMS reliability more critical. Software updates help but hardware component replacement sometimes necessary.

    Symptoms: Overheating warning, limp mode, coolant temperature spikes, reduced power
    800–3,000 $
    Ad ITMS thermostat Genesis 3.5Tthermal management valve G6DS SmartStream
  • !! Fuel Pump Failure (Stalling Recall)

    Same fuel pump recall as the 2.5T SmartStream. Pump failure causes engine stall while driving. Affects 2021-2023 model years across G80, GV70, GV80 equipped with the 3.5T. Free dealer repair — verify recall completion on any used purchase.

    Symptoms: Engine stalling, loss of drive power, check engine light, no restart
    0–0 $
    Ad fuel pump Genesis 3.5T SmartStreamhigh pressure fuel pump G6DS

+ 2 more engine weaknesses + vehicle weaknesses

Vehicle Weaknesses

WeaknessCost
✖Highway Driving Assist False Braking (Recall)

The HDA corner radar may falsely detect a vehicle, causing sudden unintended braking while driving. Affects 2023-2026 G90. Software update available from dealer. Unsettling at highway speeds.

Symptoms: Sudden hard braking with no obstacle, HDA warning, phantom vehicle detection
Ad HDA corner radar Genesis G90ADAS software update G90
 Low

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Known Problems and Issues +

A total of 8 weaknesses have been documented for the Genesis G90 RG3.5 (2023–2025) — 5 engine-related and 3 vehicle-related. Typical issues affect Other, Electronics, Body.

G90 (G6DS, 2023–2025) — Be Careful: Turbocharger Failure, ITMS Overheating (Thermal Management), Fuel Pump Failure (Stalling Recall). Power: 375 PS.

What to watch out for with the Genesis G90? See the detailed listing of all engine and vehicle weaknesses in the sections above.

Frequently Asked Questions

What problems and weaknesses does the Genesis G90 RG3.5 have? +
The Genesis G90 RG3.5 has 5 known engine weaknesses and 3 vehicle weaknesses.
What should I look for when buying a used Genesis G90 RG3.5? +
faq.watch_a_none
Which engine is recommended? +
Be careful: G6DS (3.5L Twin-Turbo (SmartStream)). No engine is rated 'Good Choice'. The most fun to drive is the G6DS (3.5L Twin-Turbo (SmartStream)).
Which Genesis G90 RG3.5 engine is the most fun? +
The {code} ({displacement}) offers the most driving fun in the Genesis G90 RG3.5 — rated: "Decent". {description} The G90 throws everything at the wall: rear-seat entertainment, massaging seats, e-supercharger on higher trims. The 3.5T delivers smooth, effortless power. Highway Driving Assist recall (false braking) is unsettling. Battery drain issues and mirror motor noises are early-adopter territory. The concierge service model means no traditional dealer — great concept, inconsistent execution. Depreciation will be brutal, making the used market the play.
Is the Genesis G90 RG3.5 worth buying used? +
The Genesis G90 RG3.5 requires careful consideration — choosing the right engine variant is crucial.
What horsepower variants are available for the Genesis G90 RG3.5? +
The Genesis G90 RG3.5 is available with engine variants from 379 to 379 hp. Petrol: G6DS (3.5L Twin-Turbo (SmartStream)).

Last updated: February 2026 · All information without guarantee