2020 GENESIS G90

Typical onset: 30,000-80,000 mi

Symptoms: Sudden onset of metallic knocking or rattling from engine bay, Check engine light with cylinder misfire codes, Metal shavings visible in oil during changes, Catastrophic loss of power or complete engine seizure, Excessive oil consumption between changes

Fix: Complete engine replacement or full rebuild required. Manufacturing defects in bearing journals and piston ring lands cause premature wear and failure. Job requires 20-30 hours labor for short block replacement, 35-45 hours for complete rebuild with head work. Hyundai/Genesis extended warranty to 10yr/100k on some VINs due to class-action pressure, but coverage inconsistent.

Estimated cost: $12,000-22,000

Typical onset: 50,000-90,000 mi

Symptoms: Blue or white smoke from exhaust under acceleration, Loss of boost pressure and significant power reduction, Whining or whistling noise from engine bay at higher RPMs, Oil consumption increases dramatically, P0299 turbo underboost code or P0234 overboost code

Fix: One or both turbochargers fail, often secondary to engine bearing material contaminating oil supply. Requires turbo replacement plus thorough oil system flush. If caught early before metal contamination spreads, 8-12 hours labor per turbo. Must inspect engine internals for root cause - if bearing wear is present, full engine work becomes necessary.

Estimated cost: $3,500-6,500

Typical onset: 40,000-80,000 mi

Symptoms: Transmission fluid puddles under vehicle, usually passenger side, Low transmission fluid warning light, Delayed or harsh shifting when fluid runs low, Pink or red fluid visible on cooler lines near radiator

Fix: Cooler lines develop leaks at crimped connections or from road debris damage. Line replacement requires 2-4 hours labor depending on access. Must address promptly before transmission runs low and causes internal damage. Flush and refill with proper SP-IV ATF required.

Estimated cost: $400-800

Typical onset: 60,000-100,000 mi

Symptoms: Clunking noise when shifting from Park to Drive or Reverse, Excessive vibration at idle in gear, Visible sagging or torn rubber on transmission mount, Increased cabin noise during acceleration

Fix: Transmission mount fails from normal wear, exacerbated by the engine's torque output. Replacement requires 2-3 hours labor with proper transmission support. Common wear item but should be addressed to prevent driveline stress.

Estimated cost: $300-600

Typical onset: 50,000-90,000 mi

Symptoms: Rough idle and misfires at cold start, Reduced fuel economy over time, Hesitation during acceleration from stop, Check engine light with multiple misfire codes, Failed emissions testing

Fix: Direct injection engines accumulate carbon on intake valves without port fuel to clean them. Requires walnut blasting of intake valves, 4-6 hours labor including intake manifold removal. Not a defect but inherent to DI design requiring periodic service every 50-60k miles.

Estimated cost: $600-1,200

Symptoms: EPB warning light illuminated on dash, Grinding or clicking noise when engaging parking brake, Parking brake fails to release or engage, Rear brake calipers seize in applied position

Fix: Electronic parking brake actuators or control module fail, sometimes seizing rear calipers. Requires caliper replacement or EPB module replacement, 2-4 hours labor per side. Software updates available but often hardware replacement needed.

Estimated cost: $800-1,800