Yes, that is the drain for the A/C evaporator, and it is a GOOD thing for water to drain out of there. The evaporator core creates a ton of condensation on it because it gets ice cold when the AC/defrost is running. The evap core is housed in a plastic box that is stuff under the dash/console behind the firewall, and the condensation build up has to drain out of somewhere (this is it).
This is why in the summertime, you will see cars/trucks sitting at red lights, look like they are profusely dripping something out. It's water. In particular, I've noticed Ford and Chevy trucks that create quite a puddle just sitting at one long red light. Totally normal.
If that spot was NOT leaking/draining water, then that's a bad thing mmkay? My inlaws have a 2006 Corolla that was a kids car, and while they were at college the first 2-3 years they left it in the garage and barely drove it. Over one winter, some varmints moved into the evap core box and made a nice home. (and you do know that vermin crap where they sleep and eat, right?) They filled the box with stuffing and crud and crap, and gummed up the drain hose. Then once summer came and they started running the AC, the water couldn't drain anywhere and it started leaking onto the carpet in the car. It STUNK horribly. And, was a real bear to get apart, clean out, and get back together. I still don't think the kid got all the gunk out of there.
OH, and I just looked at our 2008 Corolla, and yeah, we have rust in that same spot (which is a hose bracket for the power steering rack). Grrrrrr.... I'll hit that spot with some sand paper one day and a shot of Rustoleum. That's not a good spot to drain it if that bracket isn't stainless or coated otherwise to prevent rust.
Last edited by jp233; 01-15-2013 at 06:56 PM.
Reason: found rust on mine