I replace the upstream then a week or 2 the down stream went. it has 106000 miles and I see it things go bad after 100000, gee maybe thats why new cars give 10year 100000 mile sounds great when you buy new <img src="/forums/images/graemlins/kewl.gif" alt="" /> but come to the 100000 and the dealer tells you it's up now to repair it will only cost you money just like the song, then you go from <img src="/forums/images/graemlins/kewl.gif" alt="" /> to this <img src="/forums/images/graemlins/scared.gif" alt="" />then this <img src="/forums/images/graemlins/angry.gif" alt="" />tyhen this to the dealer <img src="/forums/images/graemlins/butwiggle.gif" alt="" /> LOL