2023 Audi S5 Sportback — steering wheel shakes only under highway braking

Ask what changed right before it started. Get a real battery/charging test on the 2023 Audi S5, not just resting voltage, before blaming a module. If the cheap test changes it, stop and reassess. Verbal 'we'll take care of it' is not a plan. No warning lights, which is why I'm documenting it.

Intermittent stuff lies if you only catch it once. A pressure test beats staring at a dry driveway if the 2023 Audi S5 is losing coolant with no puddle. Save the big job until that test fails. On “steering wheel shakes only under highway braking,” that was the fork that mattered for me. Stop there until you know. If your situation is the opposite, ignore me. I'm keeping receipts and dates in one folder.

I wouldn't throw parts yet. Write temp, speed, and in-gear vs coast when the 2023 Audi S5 does it — then decide on parts. Save the big job until that test fails. Verbal 'we'll take care of it' is not a plan. I've seen both outcomes, which is why I'd test instead of assume. Parking it somewhere I can hear it better next time.

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. Had a similar mess a couple years ago and that's what finally sorted it. Cold start is when I can actually reproduce it.

It did steering wheel shakes only under highway braking twice this week, both times after sitting. No change in mileage feel. I'm in no rush to be a hero on it.

Log the conditions before you spend. Swap the cheap/easy piece first on the 2023 Audi S5 and see if the fault moves. If the cheap test changes it, stop and reassess. On “steering wheel shakes only under highway braking,” that was the fork that mattered for me. If they can't show the line item, I assume it's hiding. If your situation is the opposite, ignore me. I refuse to clear codes until someone else sees them.

Start with the test that can prove you wrong. Get a real battery/charging test on the 2023 Audi S5, not just resting voltage, before blaming a module. If the cheap test changes it, stop and reassess. Verbal 'we'll take care of it' is not a plan. Happens in gear, not in park, for what that's worth.

Ask what changed right before it started. A pressure test beats staring at a dry driveway if the 2023 Audi S5 is losing coolant with no puddle. You'll know quickly if you're on the wrong tree. Verbal 'we'll take care of it' is not a plan. Cold start is when I can actually reproduce it.