john in KY Posted March 11, 2021 Share Posted March 11, 2021 Checked some diagrams that show 3. Looked under car and see only 2 in the manifold pipes. Replaced the midsection exhaust pipe a few years back and don't recall a downstream sensor. Haven't crawled yet under the car, just had my second virus vaccination and am sore all over, but will in a day or two. If only 2, which is the upstream and downstream? Quote Link to comment Share on other sites More sharing options...
john in KY Posted March 11, 2021 Author Share Posted March 11, 2021 Just learned from a reliable source there are a total of 4 sensors. Problem solved. Quote Link to comment Share on other sites More sharing options...
idosubaru Posted March 12, 2021 Share Posted March 12, 2021 Youre on it - they’ve got more than two. But they’re places further forward and not in the mid pipes like some older models There may even be a few differences - like CA, non CA, 00-04, 05-09, Tribeca/Outback. I’m unsure if all of those H6s have the same number? Quote Link to comment Share on other sites More sharing options...
Numbchux Posted March 14, 2021 Share Posted March 14, 2021 They made 3.0s for over 10 years.... '01-'04 has 3. One on each side right by the heads, and one right after the 2 pipes join into one in the secondary cat, right before the flange to the midpipe. Quote Link to comment Share on other sites More sharing options...
john in KY Posted March 15, 2021 Author Share Posted March 15, 2021 08 has 4. Replaced the front ones but any tricks on how to remove the rear 2? Just can't get a wrench up there. Thinking about just dropping the exhaust. Quote Link to comment Share on other sites More sharing options...
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