My evo was called in to the dealership to have a TSB performed on it shortly after I bought it brand new is 2003. I asked what it was for, and was told it was for water intrusion into the driver footwell area. Tech said he just sealed it up with some silicone...let me see if I can find that TSB

 

2003 Mitsubishi LANCER
03 - Body > STRUCTURE : BODY [Part 162000 ]
TSB No: 0342B001
NHTSA ID:
Date: July 01, 2003
Summary: water entry into vehicle interior. *tt

 

Yearly bump! It's the middle of winter and a PITA time to do this, but hey you never know

 

It's like 10 degrees or something tonight here, but I plan on sealing mine up asap. Mine only has 32k on it but its gonna be doing that every year all year round so I'm sure it could use it