How hard is it to change a rear oxygen sensor on a 2002 Subaru Forester?
That's a tough one to answer. Just changed the rear oxy sensor on my '00 and yours should be about the same. My local auto parts store lends a set of sockets for just this purpose and I do recommend them. Takes some patience and trying different angles. Mine took a little more force than I could exert with a 3/8" ratchet but once it broke loose it unscrewed the rest of the way with ease. It is an awkward job but not hard. Keep the end of the new one clean, including no fingerprints. Does that answer your question? ...Ken
Yes they are the exact same engine , of course if you have a 2.5 lts on the forester (common) well parts from the 2,5 rs will fit for sure. camshaft(if single or dual) intake, valve cover etc.. sensor exaqctly the same. But to be direct with your question (YES THEY ARE THE EXACT SAME THING) hope this helps.