Join Date: Mar 2005
Car: 2016 WRX, 2017 BRZ, 2017 Legacy
Feedback Score: 0 reviews
My 2017 2.5i Legacy does it too, but oh so slightly that it's almost unnoticeable. I've chalked it up to the CVT, and have noticed it on other brand's CVT's as well (I rent cars a lot).
But now that I think about it, it could be the ultra-lean EPA fuel trims. Our 2005 OBXTMT did it a little too until we reflashed the ECU with an AP, which improved it. Same thing with my Ninja 1000 ... reflashed the ECU and the problem went away.
Hm. That's not likely going to be something Subaru is going to fix ... when out 2005 OBXT was doing it @ 30k, it took three trips to the dealer to get them to acknowledge it was doing it. Then they spent three days trying to figure it out before telling me "they all do that and it's just the way it is". Now, with 175k and post-burnt-valves, and a stage 1 tune, it still does it a little.
Maybe I need to look at as "just a Subaru thing", like the ill-fitting body panels and drunken-monkey-head-unit design.