Take it in to the dealer. There are SEVERAL points of entry that i have found from the 3G Eclipse as water entry is a VERY COMMON occurance. There are also a few TSB's that address this issue. I have found area's of leakage deep from behind the dash that was a major b**ch to repair- i can almost guarantee you that your dealership has had some experience troubleshooting this complaint. Let it be known the the same problems can be found in the 99-03 Galant, Endeavor, and Outlander as far as mysterious water leaks. I dreaded last winter season when they just kept coming in... water leaks everywhere [:@] In the meantime- pull your amplifier out from under your passenger seat or it'll fry if the water level gets high enough... trust me on this.

Joel, CA

 

That's IT I'm gonna take and caulk EVERY possible point of entry for water on my car when I get it up here LOL.

 

did u ever find the source of the leak?

 

it is a clogged AC drainage line, Mitsubishi will not do a darn thing about it, costs a pretty penny to "fix" good luck.