11 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHSat nav discs
Leading reported evidence
Replace comand
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
I'd be very leery of copy discs from wherever - replacing PCM is probably as expensive, if not more, than replacing Comand.
Leading evidence: 'Replace comand' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace comand' (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.
Replace pcm is probably as expensive, if not more, than
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
I'd be very leery of copy discs from wherever - replacing PCM is probably as expensive, if not more, than replacing Comand.
Set from a reputable source (mb or comandonline normally)
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
However, many upgrade disc sets can be used more than once (except MB have now somehow linked the upgrade to the VIN to stop this, but thankfully on cars somewhat younger than mine!) so there's an active market on the forums and eBay for genuine discs - normally for half or less the price of a new set from a reputable source (MB or Comandonline normally).
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
Porsche list a "2008/2009" map set for PCM1, but it is £303+vat.
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
Yes, you would lose the Trip function of the PCM, but you could still use the OBC function on the stalk.
Set from a reputable source (mb or comandonline normally)
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
However, many upgrade disc sets can be used more than once (except MB have now somehow linked the upgrade to the VIN to stop this, but thankfully on cars somewhat younger than mine!) so there's an active market on the forums and eBay for genuine discs - normally for half or less the price of a new set from a reputable source (MB or Comandonline normally).
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.
11 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Porsche Club GB: 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: 20261026T113718Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
I'm looking at some sat nav discs from a guy in Poland,has anyone had any experience of such items off ebay.I'm also asked if mines an eight or sixteen bit PCM, it's a 2000 C4 if anyone knows,thanks in advance.
You should have the 8-bit navigation drive. The 16-bit version was introduced in January 2001. Unfortunately, the Vauxhall/Opel disks won't work in your drive, which is probably what the Polish seller is offering.
Porsche list a "2008/2009" map set for PCM1, but it is £303+vat. I think that would be your only option.
I would put the £300 towards a decent aftermarket double-DIN head unit which work better, and be more functional than any PCM unit. In your car, it would be a relatively simple swap.
Hi Guys, I've also been looking into the Sat nav problem. Mine is a 2004 C4S. I've heard so many things about disks being good/bad its hard to know what to believe. All I'd like is a postcode function on my sat nav, the rest is fine. Anyone had any success?
There are similar problems with the MB Comand satnav system, where those that know warn against dodgy copy type discs that can easily turn your £2500 Comand system into a useless box with only replacement as an option - OUCH!! However, many upgrade disc sets can be used more than once (except MB have now somehow linked the upgrade to the VIN to stop this, but thankfully on cars somewhat younger than mine!) so there's an active market on the forums and eBay for genuine discs - normally for half or less the price of a new set from a reputable source (MB or Comandonline normally). For example, MB today quoted me over £150 for the update discs for my Comand, I've seen them sell on eBay for £60.
I'd be very leery of copy discs from wherever - replacing PCM is probably as expensive, if not more, than replacing Comand.
