Anyway back on subject, do a google search about the 2.5 engine and see what a dog it is.
I'd get your money back asap as personally I wouldn't want a 2.5 wrx for 4k nevermind the money you paid which I'd say is at least 2.5k too much.

 

Are you selling it just because of the rear knock? Sounds a bit extreme.

Scoobies cost quite a bit more to run that your average Ford Focus.

To be honest, I'd be amazed if your warranty covered shock absorbers anyway. They are a wear and tear item anyway. Try spraying the shaft which grease as already suggested. Did mine 6 months ago and the knock still hasn't come back yet.

 

I'm selling because of the rear shocks, the sh#t brakes, the ridiculous money it costs to run and, now, because apparently the engine is a 'dog'. Great car all round then?

 

not really the engine is a dog but research prior to buying would have told you that and maybe the fact its way overpriced.

but as said above the shocks are a common issue and possibly not covered under warranty but not a hard or expensive fix.

 

Disagree. New owner with no real knowledge of Imprezas plus having eyes shut on how expensive they are to run, then slagging the car off because they didn't do their research.

Sounds a more apt version of events.

 

+1

 

You forgot slow as **** in that description