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Replacing cats on 4S. rear O2's to short for new cats

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YOUR RESEARCHReplacing cats on 4S. rear O2's to short for new cats

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Replace cats

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Performed · outcome unconfirmed · Original poster
So I just replaced the cats on my 04 4S.
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Replacing cats on 4S. rear O2's to short for new cats

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Leading evidence: 'Replace cats' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace cats' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.

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Replace cats

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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Discussions that performed work without a confirmed outcome: 1

0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.

0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.

Performed · outcome unconfirmed · Original poster
So I just replaced the cats on my 04 4S.
Original post Read captured discussion
Replacing cats on 4S. rear O2's to short for new cats

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Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.

1 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.

Rennlist: 1 discussions

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POST 1 / ORIGINAL POSTEROriginal post

So I just replaced the cats on my 04 4S. I was able to locate a set of OEM cats for my car but I was a bit surprised when I went to put them on. The rear O2 location for the cats on my car was in the middle of the cat. The new ones the rear O2 was further down after the cat. When I went on to Sonnon Porsche site to check part numbers it showed the further down location as the correct one. Did Porsche redesign the cats because they were failing early due to the O2 location? I ended up splicing the O2 wires to extend them to reach but was just wondering. The cats the came off the car were original the car has 114k miles.

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