Hey all, just got a 2012 STi a couple weeks ago and I've noticed a few "bumps" in the idle from time to time. Not sure if it's due to gas quality, break in or if there could be an issue. The RPMs don't jump around, there's just a few bumps in the idle every so often. It's not that noticeable but I'm the type that notices everything when it comes to a car. I doubt it's an issue but I just wanted to get some opinions on possible causes. I'll have the dealer check it out when I take it in for the free 7500 mile service if it doesn't clear up. Thanks guys and gals!