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2023 Audi S5 — rear end still feels floaty after new shocks

SunBeltGarageCommunity StarterApr 11, 20262023 Audi S5 SportbackPennsylvania
2023 Audi S5 Sportback, about 55,000 miles. Shocks were replaced and there are no obvious loose parts, but the rear still feels vague over highway undulations. What alignment, bushing, tire or installation issues could mimic worn dampers? I am trying to get the facts straight before spending money.
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15 replies

LongMilesDriver187Community StarterCommunity StarterApr 11, 2026permalink
I'd want a measurement, not a hunch. Loaded-suspension checks on the 2023 Audi S5 catch play that a wheels-hanging inspection misses. That's the branch I'd chase this week. Did the worksheet show tax yet? I'd rather be boring and correct. Only after sitting overnight so far.
RustBeltHunterCommunity StarterCommunity StarterApr 11, 2026permalink
This is usually cheaper to test than to guess. Swap the cheap/easy piece first on the 2023 Audi S5 and see if the fault moves. Save the big job until that test fails. This is from a 2023 Audi S5 in Pennsylvania with 55,000 miles. When does it actually happen? Happens in gear, not in park, for what that's worth.
TrackDriver444Community StarterCommunity StarterApr 13, 2026permalink
Not convinced that's the whole story. Capture voltage while the 2023 Audi S5 is actually failing — after it restarts you've lost the clue. That's the branch I'd chase this week. This is from a 2023 Audi S5 in Pennsylvania with 55,000 miles. That's the whole play. If this is nothing, great. I want that in data.
CleanDad31Community StarterCommunity StarterApr 11, 2026permalink
Intermittent stuff lies if you only catch it once. 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. On “rear end still feels floaty after new,” that was the fork that mattered for me. Did the worksheet show tax yet? Only after sitting overnight so far.
LongMilesDriver187Community StarterCommunity StarterApr 12, 2026permalink
Log the conditions before you spend. Loaded-suspension checks on the 2023 Audi S5 catch play that a wheels-hanging inspection misses. That's the branch I'd chase this week. On “rear end still feels floaty after new,” that was the fork that mattered for me. Any freeze-frame data saved? Parking it somewhere I can hear it better next time.
SunBeltGarageCommunity StarterCommunity StarterApr 12, 2026permalink
Tried a second charger / second scan and the story on the 2023 Audi S5 didn't change. No warning lights, which is why I'm documenting it.
SunBeltGarageCommunity StarterCommunity StarterApr 13, 2026permalink
It did rear end still feels floaty after new twice this week, both times after sitting. No change in mileage feel. If that fails I'll eat the diagnostic fee.
EVRoadie157Community StarterCommunity StarterApr 12, 2026permalink
Start with the test that can prove you wrong. Move a coil or plug on the 2023 Audi S5 if it's cylinder-specific and see whether the code follows. That's the branch I'd chase this week. Write the result down so the next test isn't a repeat of the last one. That's my plan before I call anyone.
EVRoadie157Community StarterCommunity StarterApr 12, 2026permalink
I'd want a measurement, not a hunch. 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. Time, temperature, and whether it's in gear are the notes that actually help a shop. Not trying to scare you — just skip the expensive first guess. Happens in gear, not in park, for what that's worth.
SunBeltGarageCommunity StarterCommunity StarterApr 12, 2026permalink
Cleared nothing. I want service to see the alert on the 2023 Audi S5 first. Only after sitting overnight so far.
HybridFan335Community StarterCommunity StarterApr 12, 2026permalink
If it were in my driveway, capture voltage while the 2023 Audi S5 is actually failing — after it restarts you've lost the clue. If the cheap test changes it, stop and reassess. That's the whole play. I'd sleep better after that step, even if it finds nothing. I'd rather pay for diagnosis than a second guess-repair.
ColdStartDetailer962Community StarterCommunity StarterApr 12, 2026permalink
I'd want a measurement, not a hunch. 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. If you share a photo of the worksheet, easier to sanity-check. I'd rather be boring and correct. Cold start is when I can actually reproduce it.
RoadTraveler327Community StarterCommunity StarterApr 12, 2026permalink
Ask what changed right before it started. If a shop can't duplicate it on the 2023 Audi S5, bring a video plus freeze-frame data, not just a story. You'll know quickly if you're on the wrong tree. A shop burned me once by skipping that step. A day of patience here is cheaper than a wrong part. That's my plan before I call anyone.
NewCarWeekend848Community StarterCommunity StarterApr 12, 2026permalink
Intermittent stuff lies if you only catch it once. Loaded-suspension checks on the 2023 Audi S5 catch play that a wheels-hanging inspection misses. That's the branch I'd chase this week. On “rear end still feels floaty after new,” that was the fork that mattered for me. If it doesn't change the out-the-door or the repair estimate, it's noise. If it repeats twice more I'll book time.
RustBeltHunterCommunity StarterCommunity StarterApr 12, 2026permalink
I wouldn't throw parts yet. If a shop can't duplicate it on the 2023 Audi S5, bring a video plus freeze-frame data, not just a story. You'll know quickly if you're on the wrong tree. Have you gotten a second quote in writing? Your commute and mine probably aren't the same, but the test still applies. This is me being the wet blanket on purpose.
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