Pelican Parts

Question on 996 DME/ECU and Engine

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

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YOUR RESEARCHQuestion on 996 DME/ECU and Engine

Leading reported evidence

Replace engine (assuming the new engine is the same type)

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Reported fixes: 0
Unsuccessful attempts: 1
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Discussions that contain suggestions: 1

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Suggestion
You can replace an engine (assuming the new engine is the same type) but you can not mix and match components such as DME and other control units.
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Question on 996 DME/ECU and Engine

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Leading evidence: 'Replace engine (assuming the new engine is the same type)' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace engine (assuming the new engine is the same type)' (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 engine, you must have your dme reprogrammed by porsche

Suggestion or failed attempt

No successful repair reported for this finding.

0
Reported fixes: 0
Unsuccessful attempts: 1
Discussions

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Discussions that contain suggestions: 1

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

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Suggestion · Original poster
They also told me that if you change the engine, you must have your DME reprogrammed by Porsche.
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Question on 996 DME/ECU and Engine

Frequently discussed actions (2)

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Replace engine (assuming the new engine is the same type)

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
You can replace an engine (assuming the new engine is the same type) but you can not mix and match components such as DME and other control units.
Original post Read captured discussion
Question on 996 DME/ECU and Engine

Replace engine, you must have your dme reprogrammed by porsche

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
They also told me that if you change the engine, you must have your DME reprogrammed by Porsche.
Original post Read captured discussion
Question on 996 DME/ECU and Engine

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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.

Pelican Parts: 1 discussions

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Generation: 20261026T052503Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

Hello all, Someone told me that on a 996 3.4, the engine and the DME are "matched". The DME must be programmed specifically for that particular engine, and you cannot "mix and match" different DME's and engines. They also told me that if you change the engine, you must have your DME reprogrammed by Porsche. I find this a little hard to believe since the specs for each engine should be the same. Has anyone ever heard of this?? Any input would be appreciated. Thanks in advance.

POST 2Original post

The DME is "matched" to the other control units in your car. In particular the DME hand-shakes with the immobilizer unit and talks to the alarm unit. You can replace an engine (assuming the new engine is the same type) but you can not mix and match components such as DME and other control units. All control units have the VIN number of the actual car in their permanent memory. To my knowledge all engine sensors and actuators on the 996 engine are dumb - they do not have any VIN-specific information. They simply provide signals to the DME or receive signals. The issue comes up when someone wants to upgrade from a 3.4 to a 3.6. This is when the DME and sometimes the harness needs to be changed and that causes a rat-tail of other issues. Ingo

POST 3 / ORIGINAL POSTEROriginal post

Thank you Ingo. Good information! This clears up a lot! I really appreciate it!

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