The wagons (not sedans) of this generation have a leak that allows water to collect around the rear strut towers, causing rust. If not attended to, rear suspension can detach from the body. Rear interior carpet removed, cut out rust, and welded new metal to replace rust.
See our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. To see how
frequently 2004 Subaru Impreza / Outback Sport problems occur, check out our car reliability stats.