I've got an '04 WRX 'wagon with the 330mm Prodrive/Alcon brake upgrade and Ferodo DS2500 pads.

My wife uses the car the majority of the time, and i'd not driven the car for a few weeks. When i drove it yesterday i there was quite bad juddering coming from the front end.

She doesn't use the car that hard so i can't beleive that the discs are warped, which leads me to think that it's got to be pad deposits on the discs. From other threads the pads i'm using are notorious for this problem. Is this likely given the light use of the car.

So, is my diagnosis correct, and if so what's the best way to get the deposits off the discs, and to lose the juddering?

Cheers in advance,

Andy

Sounds odd. Your wife's gentle driving should tend to remove deposits (ie normal driving will remove deposits). Do the discs have a smeared/blotchy appearance which would indicate deposits (which will only appear if driven very hard). If they are nice and shiny you'll have to look elsewhere.

oh ... yet another ds2500 brake judder problem. Surprise Surprise.

Discs will need skimming (although judder will probably come back) or replacing.