The 2019 G80 with the 3.8L V6 is generally reliable luxury transportation, but suffers from catastrophic engine failures tied to metal debris contamination from manufacturing—a known Theta II engine family issue that Hyundai/Genesis has been addressing through recalls and warranty extensions.
Catastrophic Engine Failure (Theta II Metal Debris)
Occasional · high severityTypical onset: 40,000-90,000 mi
Symptoms: Knocking or ticking noise from lower engine, especially on cold start, Metal shavings in oil during changes, Sudden loss of power or complete seizure, Check engine light with rod bearing codes, Oil pressure warning light
Fix: Complete engine replacement or rebuild required. Metal debris from manufacturing process damages rod and main bearings, leading to spun bearings and total failure. 18-25 labor hours for short block or long block replacement. Some vehicles covered under extended warranty or recall—verify eligibility before paying out of pocket.
Estimated cost: $8,000-15,000
Transmission Oil Cooler Failure
Common · medium severityTypical onset: 60,000-100,000 mi
Symptoms: Transmission fluid in coolant (strawberry milkshake appearance in overflow tank), Coolant in transmission (slipping, delayed engagement), Overheating transmission temperature warnings, Harsh shifting or transmission failure if cross-contamination occurs
Fix: Replace transmission oil cooler assembly and flush both cooling system and transmission. If caught early (fluid mixing but no damage), 4-6 hours labor. If transmission is contaminated, add full transmission rebuild or replacement—another 12-18 hours.
Estimated cost: $800-1,500 (cooler only), $4,500-7,000 (with transmission damage)
ABS Module Failure
Occasional · high severitySymptoms: ABS warning light illuminated, Loss of ABS and traction control functions, Reduced braking performance in slippery conditions, Hard brake pedal or unusual brake feel, Recall 20V-738 addresses this on some VINs
Fix: Replace ABS control module. Recall covers specific VINs for free—check with dealer first. If not covered, module replacement takes 2-3 hours including bleeding brake system and calibration with dealer scan tool.
Estimated cost: $1,200-2,000
Starter Solenoid Failure
Occasional · medium severityTypical onset: 50,000-80,000 mi
Symptoms: Single click when turning key with no engine crank, Intermittent no-start condition (works after multiple attempts), Dashboard lights function normally but engine won't turn over, Recall 21V-838 addresses this issue on certain VINs
Fix: Replace starter assembly. Recall covers affected VINs—verify eligibility. Location is relatively accessible from underneath. 2-3 hours labor for replacement.
Estimated cost: $400-750
Transmission Mount Failure
Common · low severityTypical onset: 70,000-110,000 mi
Symptoms: Clunking when shifting from Park to Drive or Reverse, Vibration at idle that changes when shifting to Neutral, Excessive driveline movement during acceleration, Visible cracks or separation in rubber mount
Fix: Replace transmission mount (most commonly the upper mount fails first). Straightforward job requiring transmission support while swapping mount. 1.5-2.5 hours labor.
Estimated cost: $250-450
Turbocharger Failure (3.3T models)
Rare · high severityTypical onset: 80,000-120,000 mi
Symptoms: Loss of boost pressure and power, Blue smoke from exhaust on acceleration, Loud whining or grinding noise from engine bay, Oil consumption increase, Check engine light with turbo underboost codes
Fix: Note: This applies to 3.3T engine option if equipped (not the base 3.8L). Turbo replacement requires removing significant intake and exhaust components. 8-12 hours labor per turbo. Recall 21V-005 covers some failures related to oil supply issues.
Estimated cost: $3,000-5,500
Buy only with comprehensive pre-purchase inspection and verified clean engine history—excellent value if the motor checks out, but catastrophic failure risk makes extended warranty essential on higher-mileage examples.
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.