So, I had some water damage in my trunk and for the longest time thought it was the wing on my trunk leaking.  Turns out I had 1" of water in the wheel well.  Finally decided to fix the problem.  This is being done on my 2004 Subaru WRX.

Things to do before: Make sure you locate the source of the water.  In my case it was water under the carpet.  However your issue maybe bigger than this.

-Paper Towels
-Heater (to ensure all cracks are dried)
-Jig Saw

- 4' x 4' x 1/4" plywood - $12
- 4' x 6' Carpet - $12
(All from Lowe's)

Step 1: CLEAN

Once the leak/ problem is solved its time to clean.  Mine had 1" of water in the wheel well and I don't know how it got there.  I also had the smell of mildew throughout the entire trunk.
I bet that plywood weighs way more than the compressed cardboard that the factory had there. When my taillights leaked, I just removed all of the carpet back there, and tossed it. I'm going to put truck bedliner back there just because it'll seal it, and it's functional.<br />
Not a bad idea to use bedliner in the trunk.
&nbsp;That a lot stronger than the original as well but did you find/fix the leak ?
Yeah, I'd been looking for weeks and it was all from before I&nbsp;bought the car.<br />

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