Don't worry about it, I feel it too, it's probablly just the engine that's make the car vibrate alittle. My bro's old mustang did it too, and you can tell it was the engine by listening and matching up the noises with the vibration, you can probably do the same with your car.

 

Mine's had a slight vibration on idle since new, March '01. It feels like an old air cooled VW that's gone to college.

 

Yeah it suprised the hell out of me...

I bought this brand new car....then I would get in it in the driveway...it would be sitting there perfectly still...then - I would start the motor and I could feel the car vibrating while it was idling.

Pisses me off to no end...they wont even do anything about it under the warranty. Something about being within tolerances.

 

this is normal condition,i would advise you to go to your local dealer compare it to another wrx.id be happy to explain why this is if youd like,just pm me.

 

I think the rough idle is kind of "cute" for some reason... it rumbles like a dragster on the line, running rich enough to explode.

 

when ac/heat is on, the car tends to vibrate more an dyes it's normal