ahh my ignorance - if it is significant ie whole car judders, not just through steering wheel it may be the transmission - might need a fluid change, do you know if it has been done - imprezas are recommended to be done every 50.000, more if towing
yup as above check the wheel balance first - is it an auto box or manual? Is the vibration felt just through steering wheel or whole car / drivers seat?
Wotcha and welcome -feel free to get stuck in all friendly on here - I dont have a rattle but there are a couple of squeaks where the dash meets the pillar trim and also the luggage cover. A rattle does sound like something has come loose
only slightly out of touch with you younglings - I went into Game yesterday to buy the PC version.... so back home again downloaded it and got stuck in, awesome game done a bit of rally cross and the odd stage plus pikes peak - turns out I am more of a fair weather driver when it comes to that course in the rain and spent more time going back down the hillside than up the tarmac. Very addictive can see a fair amount of time being spent on it.