I noticed water inside the trunk saturating the carpet & went into spare tire wheel well. This morning I discovered a puddle of water in the rear drivers side floor saturating the carpet.
I initially thought the leak was from pine needle debris clogging up the trunk door area - see pics:
but it seems unlikely.
How do I diagnose the source of the leak & how do I fix it? Are there known water leak issues with this 1st Gen Focus models?