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Engine number

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3 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis

THIS DISCUSSION / SOURCE-DERIVED OVERVIEW

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YOUR RESEARCHEngine number

Leading reported evidence

Replace from double row ims bearings

Performed · outcome unconfirmed

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that performed work without a confirmed outcome: 1

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Performed · outcome unconfirmed
Reputable literature says Porsche engine production changed from double row IMS bearings to single row during the 2001 build year.
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Engine number

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Leading evidence: 'Replace from double row ims bearings' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace from double row ims bearings' (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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1 matching discussions · 3 captured posts examined · 0 partial discussions

Frequently discussed actions (1)

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Replace from double row ims bearings

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
Reputable literature says Porsche engine production changed from double row IMS bearings to single row during the 2001 build year.
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Engine number

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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: 20261027T051247Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hi folks.., Just had a look yesterday and discovered my engine number The number is M96/0466y11823 Porsche 911 2000 C4 My question is...is this the original engine (on my car) and what kind of bearing it used? i mean single or duel row ball bearing Thanks Robert

POST 2Original post

My understanding is that there would be an AT in the serial number if it was a remanufactured replacement engine from Porsche. For example, mine is M96/01AT66X65297. Dual rows were in the 99 and I believe most 2000 model years, others here on the forum can probably narrow that down.

POST 3Original post

Reputable literature says Porsche engine production changed from double row IMS bearings to single row during the 2001 build year. But no engine number, VIN, or build date data exists to confirm which bearing a 2001 may have. Only a direct eyeball inspection by a skilled tech of the IMS area can determine such things. If, if, if...your 2000 has its original engine and IMS bearing, meaning it is not a reman. engine, then it should have the double row IMS bearing. Sorry for the equivocation above, but Porsche NA refuses to clarify many of the unknowns associated with the IMS failures. relinuca

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