2.5L GDI fuel-injector failure → cylinder misfiremajor
- 2.5L GDI Theta III (gen 4, gas)
The gas Tucson's 2.5L Theta III direct-injection engine carries the same injector problem as the 2022: a broken internal filter lets the injector leak, and the cylinder misfires — check-engine light, shaking, and power reduction, sometimes with a burning smell. Hyundai's bulletin replaces all four injectors. One owner describes fuel injector #3 failing on a highway trip, the engine chugging and losing power to 40 mph in traffic. Under warranty it's covered; out of warranty it's an expensive direct-injection repair. Pull codes, and ask whether the injector bulletin was performed.
Sources: NHTSA complaint database, 2023 Tucson, Tucson Hybrid, and Tucson Plug-in Hybrid (PHEV) · NHTSA manufacturer communications (recalls 23V526/25V893, 2.5L GDI injector bulletin) · Independent mechanic channel transcripts (4th-gen Tucson)
$0
All four injectors under warranty
expensive; get a quote
Injector job out of warranty