So my 06 wrx has almost 12,000 miles on it and recently the left rear tire had been deflating, it completely deflated twice and twice i put air in it. While im driving home from school 2 nights ago it deflates again so i take it to the gas station to pump it, and while inflating it just before it got to 33 psi it just exploded, i took it off and it exploded on the inside of the tire. I was just wondering if this would be covered under warranty as a faulty tire?

There was a reason why it was leaking and you need to find out why.

Tires are not covered under warranty by Subaru. They are covered by the tire manufacturer.

If you really think it was defective, (no nails, puctures, holes, etc), then take it to a tire place that handles that brand of tires.

or if you have the free tires for life from you dealer as i do you would take it to the dealer.