The 2024 G90 is too new for meaningful pattern data, but its 3.3L twin-turbo V6 (shared with other Genesis/Kia platforms) has shown early-life engine failures in prior model years—catastrophic bearing and piston failures that warrant caution.
Catastrophic Engine Failure - Rod/Main Bearing Seizure
Rare · high severityTypical onset: 5,000-40,000 mi
Symptoms: Sudden knocking noise from engine block, Metal shavings in oil, Check engine light with misfire codes, Complete engine seizure without warning
Fix: Total engine replacement or full rebuild required. This involves 18-25 labor hours for complete short block replacement, sometimes covered under warranty if caught early. Outside warranty, you're looking at a factory reman or used engine swap.
Estimated cost: $12,000-18,000
Transmission Oil Cooler Line Leaks
Occasional · medium severityTypical onset: 30,000-60,000 mi
Symptoms: Transmission fluid spots under vehicle, Low transmission fluid warning, Burnt fluid smell, Harsh shifting when fluid gets low
Fix: Replace cooler lines and fittings, flush transmission system. 2-3 labor hours plus fluid and parts. Often caused by vibration wear on metal lines or crimp failures at fittings.
Estimated cost: $600-1,200
Fuel System Vapor Line Separation
Occasional · medium severitySymptoms: Strong fuel odor in cabin or near rear of vehicle, Check engine light with EVAP codes, Difficulty fueling/pump clicks off repeatedly
Fix: Related to NHTSA recall—fuel vapor lines can separate at connections. Dealer repair involves replacing affected hoses and clamps. 1-2 hours labor, typically warranty/recall covered.
Estimated cost: $0-400
ADAS Camera/Radar Calibration Drift
Occasional · low severitySymptoms: Highway Driving Assist disengages unexpectedly, Forward collision warning false alarms, Lane keeping assist error messages, Adaptive cruise won't activate
Fix: Cameras or radar require recalibration, sometimes after windshield replacement or minor front-end impacts. Dealer-level equipment required. 1-2 hours for recalibration, but if hardware needs replacement, add 2-3 hours.
Estimated cost: $300-2,500
Transmission Mount Deterioration
Occasional · low severityTypical onset: 40,000-70,000 mi
Symptoms: Clunk when shifting from Park to Drive, Excessive vibration at idle, Driveline shudder during acceleration, Visible mount separation on inspection
Fix: Replace transmission mount(s). The 8-speed transmission in these is heavy and stress-loads the mounts. 2-3 hours labor depending on access and how many mounts need replacement.
Estimated cost: $400-800
Too early to recommend used—2024s are still under warranty, and the engine failure history on this platform makes me want 3+ more years of data before buying out-of-warranty.
AI-assisted summary drawn from NHTSA recall data, our labor-times database, and platform knowledge. Not a substitute for a pre-purchase inspection on a specific vehicle.