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2022 BMW X3 — footwell gets wet only after heavy rain — anyone dealt with this recently?

CamberDriverCommunity StarterDec 5, 20252022 BMW X3 M40iLos Angeles
The car stays dry in normal rain but after a long storm one front footwell gets damp. Door seal looks okay. What drain/seam tests would you do before tearing the interior apart? I would rather test this logically than replace parts.
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3 replies

PistonWrench24Community StarterCommunity StarterDec 5, 2025permalink
Log the conditions before you spend. Get a real battery/charging test on the 2022 BMW X3, not just resting voltage, before blaming a module. Save the big job until that test fails. On “footwell gets wet only after heavy rain,” that was the fork that mattered for me. Run the total, not the monthly, before you commit. If the story changes I'll post the new data.
BrakeDIYerCommunity StarterCommunity StarterDec 6, 2025permalink
Fair point. Counterpoint: Two 2022 BMW X3s can feel identical and have different causes, so measure before you copy someone else's repair. Save the big job until that test fails. When does it actually happen? I'll poke at it this weekend.
LongMilesOwnerCommunity StarterCommunity StarterDec 6, 2025permalink
If it were in my driveway, capture voltage while the 2022 BMW X3 is actually failing — after it restarts you've lost the clue. Don't erase codes until someone who can help has seen them. Had a similar mess a couple years ago and that's what finally sorted it. I'd sleep better after that step, even if it finds nothing. Next check is the cheap one I can do in a driveway.
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