15 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHIis IMS retro needed on a reman engine ?
Leading reported evidence
Check engine serial number
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
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
Checked my engine serial number after reading a thread or two here, and found mine has the "AT" code which defines it as remanuaftured (M96/01AT66X65297).
Leading evidence: 'Check engine serial number' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check engine serial number' (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.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
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.
Suggestion
The IMS should have been replaced BEFORE, as in "preventive maintenance."
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Check engine serial number
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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
Checked my engine serial number after reading a thread or two here, and found mine has the "AT" code which defines it as remanuaftured (M96/01AT66X65297).
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.
15 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261027T005001Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Checked my engine serial number after reading a thread or two here, and found mine has the "AT" code which defines it as remanuaftured (M96/01AT66X65297). This seems to be good news
, but does it mean that LN IMS retrofits or upgrades are not required ? Or is it possible that the factory remans did not "fix" this potential issue completely ? Last oil change did not show any shiney bits of horror. Car as 78K miles. I have no idea when the reman was installed, but will research it. Not horribly concerned about it but curious. Thanks !
The long and short.
Yes the larger bearing can and have failed but requires complete engine teardown to replace.
No you shouldnt obsess over it. Keep the rpms up and the oil fresh and that bearing has a good chance of lasting the "lifetime" (practically speaking) of the car.
Depends.
Is your reman engine 2006 or later? If so then it has the larger bearing and you can't retrofit it (at least not without great difficulty). It doesn't really need to be replaced as long as you keep up with oil changes and don't lug it down.
Older than 2006 then you should do the retrofit because it has original bearing style
I was lucky and through hard work and Dealer help had Porsche NA goodwill a motor replacement in my '99 C2 in '06. It was explained to me that it was still a 3.4 but with a larger IMS bearing and the latest factory shaft upgrades as well as the latest "everything" component and accessory wise. A terrific deal, as far as I was concerned.
