Loud Seeping air sound coming from rear of car on driver's side. on 2004 Honda Element

1st time hearing it today when I drove in my garage. I checked on it 45 minutes later & it had stopped.

1 answer 2 comments
Check for nail in left rear tire, now flat!
(lol)

Yep :-)
Hey, i know i got this one right, i had a clue!