2024 Rivian R1S Dual-Motor — need advice: Intermittent metallic rattle after cold start

Ask what changed right before it started. Write temp, speed, and in-gear vs coast when the 2024 Rivian R1S does it — then decide on parts. You'll know quickly if you're on the wrong tree. Take it or leave it — that's what I'd do. A day of patience here is cheaper than a wrong part. Next check is the cheap one I can do in a driveway.

Intermittent stuff lies if you only catch it once. Loaded-suspension checks on the 2024 Rivian R1S catch play that a wheels-hanging inspection misses. You'll know quickly if you're on the wrong tree. On “motor — need advice: intermittent metallic rattle,” that was the fork that mattered for me. Just my two cents from doing this recently. Parking it somewhere I can hear it better next time.

I wouldn't throw parts yet. Get a real battery/charging test on the 2024 Rivian R1S, not just resting voltage, before blaming a module. Don't erase codes until someone who can help has seen them. Take it or leave it — that's what I'd do. Happens in gear, not in park, for what that's worth.

I'd want a measurement, not a hunch. If a shop can't duplicate it on the 2024 Rivian R1S, bring a video plus freeze-frame data, not just a story. Save the big job until that test fails. Just my two cents from doing this recently. I'd rather look cautious in this thread than stuck later.