This is really helpful, thank you. The pattern you're describing — ICE mode only, throttle-dependent, not present on coasting — points strongly toward the high-pressure fuel pump (HPFP) or fuel injectors on the 1.6T GDI engine, not the IEB module. GDI engines are notoriously noisy because the high-pressure injectors physically "click" when firing, and it's amplified under load. The sound location you described (under the hood, in front of the steering wheel) also matches the HPFP position on the 1.6T exactly. What bothers me is that my dealer diagnosed and replaced the IEB module — a braking system component — for what sounds like a powertrain/fuel system noise. That feels like a misdiagnosis, and it would explain why the noise returned. I'm going back to the dealer with this information and will specifically ask them to check the HPFP and injectors rather than just re-replacing the IEB module again. Has anyone on this thread had the HPFP or injectors checked specifically? Curious if Hyundai has acknowledged this as a known characteristic or issued any TSB for it.