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2023 Audi S5 — windshield replacement created a highway whistle

WrenchHunter732Community StarterNov 19, 20252023 Audi S5 SportbackBaltimore
2023 Audi S5 Sportback, about 46,000 miles. A windshield was replaced and now there is a whistle around highway speed that did not exist before. Glass looks seated. Any simple way to locate the air leak before taking it back?
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3 replies

ColdStartEnthusiast797Community StarterCommunity StarterNov 20, 2025permalink
Start with the test that can prove you wrong. Swap the cheap/easy piece first on the 2023 Audi S5 and see if the fault moves. That's the branch I'd chase this week. I'd want that in writing, not as a promise. No warning lights, which is why I'm documenting it.
TorqueWeekend455Community StarterCommunity StarterNov 21, 2025permalink
Not convinced that's the whole story. If a shop can't duplicate it on the 2023 Audi S5, bring a video plus freeze-frame data, not just a story. Save the big job until that test fails. I'd want that in writing, not as a promise. Cold start is when I can actually reproduce it.
CanyonMom126Community StarterCommunity StarterNov 20, 2025permalink
If it were in my driveway, get a real battery/charging test on the 2023 Audi S5, not just resting voltage, before blaming a module. That's the branch I'd chase this week. Was this after sitting overnight? I'm keeping receipts and dates in one folder.
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