2018 Genesis G80 Problems: 2 Issues Every Owner Should Know
2018 model year · 0+ owner reports · Updated April 2026
According to Au7o's analysis of 0+ owner reports, the 2018 Genesis G80 has 2 documented known issues. No issues are rated critical, indicating generally reliable ownership. Across all issues, repair costs range from $0 to $1,000. DIY maintenance guides at au7o.io.
All 2 Known Issues
On the 2017-2020 Genesis G80, the 3.3-liter twin-turbo V6 in earlier G80 Sport models can develop a wastegate rattle at idle and low RPM. The wastegate actuator arm and flap develop play over time, creating a metallic ticking or rattling sound most noticeable at operating temperature.
Common Symptoms
- Metallic ticking at idle
- Rattle at low RPM that disappears under load
- Noise from turbocharger area
How to Fix
Have the wastegate actuator preload adjusted at the dealer. In some cases, the wastegate actuator assembly needs replacement. Updated actuators with tighter tolerances are available for affected engines.
On the 2017-2026 Genesis G80, the G80 infotainment system experiences intermittent software glitches including screen blackouts, navigation errors, and unresponsive touch inputs. OTA updates have introduced new bugs while fixing existing ones on several occasions.
Common Symptoms
- Screen going black momentarily
- Navigation giving incorrect directions
- Touch inputs not registering
- System rebooting while driving
How to Fix
Keep the system updated to the latest firmware. Perform a factory reset after major OTA updates. Visit the dealer for a head unit reflash if persistent issues occur. The rotary controller can be used as a backup input method.