The 2024 G70 is too new for widespread pattern failures, but its predecessor platform (2019-2023) shows specific weaknesses in the 2.0T engine and 8-speed transmission that warrant close monitoring as these cars age.
2.0T Theta-II Engine Bearing Failure
Occasional · high severityTypical onset: 30,000-80,000 mi
Symptoms: Metallic knocking from engine bay at idle, Low oil pressure warning, Metal shavings in oil during changes, Sudden catastrophic failure with seized engine
Fix: This is the notorious Theta-II bearing defect carried over from Hyundai/Kia applications. Requires complete short block replacement or engine rebuild with updated bearings and crankshaft. 18-25 labor hours depending on approach. Many covered under Hyundai Motor Group's extended warranty, but out-of-pocket is brutal.
Estimated cost: $8,000-14,000
8-Speed Automatic Transmission Oil Cooler Leak
Common · medium severityTypical onset: 40,000-90,000 mi
Symptoms: Transmission fluid puddles under car, Burnt transmission fluid smell, Harsh or delayed shifting when fluid is low, Check engine light with transmission temp codes
Fix: Oil cooler lines corrode at connection points or cooler itself develops pinhole leaks. Requires dropping exhaust, sometimes subframe, to access. 4-6 hours labor plus fluid refill and programming.
Estimated cost: $1,200-2,000
Transmission Mount Failure
Occasional · medium severityTypical onset: 50,000-100,000 mi
Symptoms: Clunking when shifting from park to drive, Excessive vibration at idle in gear, Jerky acceleration from stop, Visible torn rubber on mount during inspection
Fix: Hydraulic transmission mount separates or leaks fluid. Common on models with spirited driving. 2-3 hours labor, straightforward replacement but requires supporting transmission.
Estimated cost: $400-700
High-Pressure Fuel Pump Failure (2.0T)
Occasional · high severityTypical onset: 60,000-110,000 mi
Symptoms: Long cranking before engine starts, Rough idle and misfires, Loss of power under acceleration, P0087 fuel pressure too low code, Car stalls or fails to start
Fix: Direct-injection HPFP on 2.0T wears prematurely, contaminating fuel system with metal debris. Requires pump replacement plus injector cleaning or replacement if contaminated. 3-5 hours labor.
Estimated cost: $1,500-3,000
Turbocharger Wastegate Rattle (2.0T)
Common · low severityTypical onset: 20,000-60,000 mi
Symptoms: Rattling noise at cold start or idle, Sound disappears under boost, No performance loss, More pronounced in cold weather
Fix: Wastegate actuator arm develops play, causing rattle but not affecting function immediately. Can be lived with, but eventually leads to boost control issues. Turbo replacement required. 6-8 hours labor for turbo R&R.
Estimated cost: $2,000-3,500
Carbon Buildup on Intake Valves (Both Engines)
Common · medium severityTypical onset: 60,000-100,000 mi
Symptoms: Rough idle when warm, Hesitation on acceleration, Reduced fuel economy, Misfires under load, Failed emissions testing
Fix: Direct-injection engines bypass intake valves with fuel, allowing carbon deposits. Requires walnut blasting intake ports with manifold removed. 4-6 hours labor. Preventive catch-can installation recommended.
Estimated cost: $600-1,100
The 3.3TT V6 is bulletproof; buy that if you can. The 2.0T is a gamble—great when it works, catastrophic when it doesn't, so extended warranty is non-negotiable on used 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.