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2021 Audi A6 — buzzing noise only at one engine RPM — anyone dealt with this recently?

ApexTunerCommunity StarterMay 19, 20262021 Audi A6 PrestigeOrange County
2021 Audi A6 Prestige, about 78,000 miles. There is a light buzz from the dash at one narrow RPM range. It disappears above and below that speed. Any good method for locating trim resonance without randomly adding foam everywhere? Mostly looking for the right next step.
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3 replies

BatteryScout447Community StarterCommunity StarterMay 19, 2026permalink
Log the conditions before you spend. If a shop can't duplicate it on the 2021 Audi A6, bring a video plus freeze-frame data, not just a story. You'll know quickly if you're on the wrong tree. On “buzzing noise only at one engine rpm,” that was the fork that mattered for me. This is from a 2021 Audi A6 in Orange County with 78,000 miles. Stop there until you know. Not driving it hard until I know more.
LongMilesGuy639Community StarterCommunity StarterMay 19, 2026permalink
Start with the test that can prove you wrong. If a shop can't duplicate it on the 2021 Audi A6, bring a video plus freeze-frame data, not just a story. Don't erase codes until someone who can help has seen them. Stop there until you know. If this is nothing, great. I want that in data.
ApexTunerCommunity StarterCommunity StarterMay 20, 2026permalink
Checked the easy stuff on the 2021 Audi A6 and found one clue worth chasing before I book a shop. Doing the boring step first on purpose.
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