2018 Subaru Forester — footwell gets wet only after heavy rain

If it were in my driveway, capture voltage while the 2018 Subaru Forester is actually failing — after it restarts you've lost the clue. That's the branch I'd chase this week. That's the whole play. This is me being the wet blanket on purpose.

Ask what changed right before it started. If a shop can't duplicate it on the 2018 Subaru Forester, bring a video plus freeze-frame data, not just a story. Don't erase codes until someone who can help has seen them. No need to make it theatrical. Might be overthinking it, but I'd rather overthink than overspend.

Intermittent stuff lies if you only catch it once. Swap the cheap/easy piece first on the 2018 Subaru Forester and see if the fault moves. Save the big job until that test fails. On “footwell gets wet only after heavy rain,” that was the fork that mattered for me. That's the sequence I'd use. Climate here is different, so treat that as a local data point. Trying not to diagnose from the couch.