3 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHM96/04 AT Austauschmotor / Exchange Engine ? IMS Bearing Question
Leading reported evidence
Install after
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.
M96/04 AT Austauschmotor / Exchange Engine ? IMS Bearing Question
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Leading evidence: 'Install after' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check engine number, i noticed it is stamped' (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 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
Thanks, that makes sense and may explain why it wasn’t replaced when the clutch was done.
M96/04 AT Austauschmotor / Exchange Engine ? IMS Bearing Question
Check engine number, i noticed it is stamped
Suggestion or failed attempt
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 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 · Original poster
While checking the engine number, I noticed it is stamped:
M96/04 AT Austauschmotor / Exchange Engine ? IMS Bearing Question
Recommend service/repairs at
Suggestion or failed attempt
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 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 · Original poster
They also said they usually replace IMS bearings when needed, and the owner appeared to have approved the recommended service/repairs at that time.
M96/04 AT Austauschmotor / Exchange Engine ? IMS Bearing Question
Replace ims bearings
Suggestion or failed attempt
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 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 · Original poster
They also said they usually replace IMS bearings when needed, and the owner appeared to have approved the recommended service/repairs at that time.
M96/04 AT Austauschmotor / Exchange Engine ? IMS Bearing Question
Use on later 996.2 / 3.6 replacement engines
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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 · Original poster
Could a 996.1 3.4L M96/04 AT replacement engine have been supplied with the later larger non-serviceable IMS bearing, or was that only used on later 996.2 / 3.6 replacement engines?
M96/04 AT Austauschmotor / Exchange Engine ? IMS Bearing Question
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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.
3 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: 20261026T165820Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I recently purchased an early 2000 996 Carrera, built in 1999, and I�m working through the maintenance history.
While checking the engine number, I noticed it is stamped:
M96/04 AT 66Y66627
My understanding is that
AT
indicates an Austauschmotor / Porsche exchange engine. The car has 35+ service records, but I have not found any record showing when the engine was replaced.
In 2021, a previous owner had major service done at Autobahn Extremist in Ohio, including the clutch, flywheel, RMS, and other work. I called them to ask whether the IMS was addressed while the gearbox was out. They were able to look up the record and said the IMS was not replaced, but seems like it was not required. They also said they usually replace IMS bearings when needed, and the owner appeared to have approved the recommended service/repairs at that time.
My question is:
Could a 996.1 3.4L M96/04 AT replacement engine have been supplied with the later larger non-serviceable IMS bearing, or was that only used on later 996.2 / 3.6 replacement engines?
I�m also curious whether anyone has seen an
M96/04 AT 66Y
replacement engine with a confirmed dual-row, single-row, or larger non-serviceable IMS bearing.
Thanks in advance.
All "AT" engines built and installed after
2006
had the large non-serviceable Bearing from the factory .....
All "AT" engines built and installed
from 2002 to 2005
had the small single row Bearing from the factory ...
All "AT" engines built and installed
up to 2000
had the dual row Bearing from the factory .....
Thanks, that makes sense and may explain why it wasn’t replaced when the clutch was done.
Has anyone had success reaching out to a Porsche dealership to find out when their engine was replaced? I’d be interested to know the actual mileage on my M96/04 AT engine, since the car’s mileage may not reflect the mileage on the replacement engine.
This is a source reference. Confirm exact model applicability in the original material.
