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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHAnother PCCM+ install thread - PCM 2.0 --> PCCM+
Leading reported evidence
Disconnect wires
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
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Suggestion · Original poster
To me that means opening everything up, disconnecting wires from PCM 2.0, and putting the color coordinated wires into the color coordinated receptacles on the PCCM+ that are an exact match.
Leading evidence: 'Disconnect wires' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Disconnect wires' (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.
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Disconnect wires
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
To me that means opening everything up, disconnecting wires from PCM 2.0, and putting the color coordinated wires into the color coordinated receptacles on the PCCM+ that are an exact match.
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
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: 20261026T150451Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I recently received my PCCM+ from Delaware Porsche Parts (no affiliation) and plan to forge ahead with a DYI install on my '04 C4s that I acquired in July of last year. I have done much scouring of the PCCM+ install posts and due to our wonderful internet, I am seeing a lot of competing stories on the simplicity of going from PCM 2.0 with Bose to PCCM+. I have read a lot about how this conversion is "Plug and Play". To me that means opening everything up, disconnecting wires from PCM 2.0, and putting the color coordinated wires into the color coordinated receptacles on the PCCM+ that are an exact match. I also have a 6 disc remote CD changer in my frunk that I wouldn't mind removing to go into a box and collect dust until the next owner acquires my car (if it has to stay i'll deal, though).
-When I remove the PCM 2.0, will all of the wiring connected into it be re-inserted into the PCCM+? If not, please advise what will be used and what won't be used.
-What's this I hear about a MOST conversion box or something that attaches to the PCCM+? I thought I have MOST already since I'm starting with an '04 Bose PCM 2.0 unit. relevant?
-Since there is probably a wire for the remote CD changer, which one is it and I assume that should not be plugged into the PCCM+?
-I have heard conflicting reports on the need for a ground wire, do I need a ground wire and/or does one already come with the kit? If yes, where is the easiest location to attach the ground wire.
-Have read a lot about the Carplay/USB box having a very short Cord. I want to mount this in the glovebox, which I have read is possible. Are there any tricks to doing this and what openings am I utilizing (or creating) to get the wiring to the PCCM+
-Bonus Points - My central air vent above the cupholder is crooked for some reason, when I have everything torn apart, will re-aligning that be a simple fix? I don't know what made it askew in the first place, was that way when I acquired the car. I am hoping the worst case scenario is I have to buy a new part and replace it, please correct me if I'm wrong
If anyone has an install instruction guide specifically tailored to going from PCM 2.0 with Bose to PCCM+ that would also be appreciated... I haven't found a detailed one yet, just a lot of people saying it's "plug and play", and a few more people saying they had issues even though it is supposed to be "plug and play"
Many thanks to any help from fellow RL's as always.
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