2024 Ford F-150 — buzzing noise only at one engine RPM

Write down what you already tried. A second data point from another 2024 Ford F-150 owner helps more than a generic diagnosis. Then you'll know the next fork. That's the sequence I'd use. Not trying to scare you — just skip the expensive first guess. This is the version I'd tell a friend.

Don't overfit one forum story to your car. If it still isn't clear on the 2024 Ford F-150, a specialist hour can be cheaper than another round of parts. I'd do that before spending real money. Verbal 'we'll take care of it' is not a plan. If the story changes I'll post the new data.