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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHPorsche 987.2 Boxster Spyder - Voltage/Alternator issues.... - Page 1 - Boxster/Cayman - PistonHeads UK
Leading reported evidence
Replace batteries, was fine
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
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Discussions that performed work without a confirmed outcome
1
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Performed · outcome unconfirmed · Original poster
So far I've changed batteries, was fine for a short while, I've left the car on trickle charge, but it seems the battery is not the issue.
Leading evidence: 'Replace batteries, was fine' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace batteries, was fine' (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.
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Discussions that performed work without a confirmed outcome
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Performed · outcome unconfirmed
this outfit has also been used a few times for refurb.
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
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Suggestion
Lots of threads on DIY if you're that I climbed on changing the voltage regulator on boxa.net
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.
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Suggestion · Original poster
Yesterday car was fine, today pulled car out of garage and noticed the dash go off as it started and could hear it clicking slightly, so I grabbed a multimeter and the car was only reading 12-13v car running, switch off and voltage remained same.
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
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Suggestion · Original poster
My 987.2 2010/11 Boxster Spyder has some weird voltage issue where the dash will start clicking in and out, even worse power can sometimes cut out, it is more emphasized the harder you press the throttle or the higher the revs are, at other times the car will run totally flawless.
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
Yesterday car was fine, today pulled car out of garage and noticed the dash go off as it started and could hear it clicking slightly, so I grabbed a multimeter and the car was only reading 12-13v car running, switch off and voltage remained same.
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
My 987.2 2010/11 Boxster Spyder has some weird voltage issue where the dash will start clicking in and out, even worse power can sometimes cut out, it is more emphasized the harder you press the throttle or the higher the revs are, at other times the car will run totally flawless.
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.
4 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
PistonHeads: 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: 20261026T190023Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Hi there
My 987.2 2010/11 Boxster Spyder has some weird voltage issue where the dash will start clicking in and out, even worse power can sometimes cut out, it is more emphasized the harder you press the throttle or the higher the revs are, at other times the car will run totally flawless.
So far I've changed batteries, was fine for a short while, I've left the car on trickle charge, but it seems the battery is not the issue.
Yesterday car was fine, today pulled car out of garage and noticed the dash go off as it started and could hear it clicking slightly, so I grabbed a multimeter and the car was only reading 12-13v car running, switch off and voltage remained same.
Re-started car, lots of error messages and voltage now reading 15v car running.
So it seems to me like the alternator is kicking in and out, from google searching I've read that Porsche will just swap the alternator out, but the actual issue tends to be the voltage regulator unit which cost a fraction. Then its a case of remove alternator, swap out voltage regulators and refit, hope its fixed.
Any people here had similar issues with a Boxster? How did you fix it?
Also can anyone share a link to the correct voltage regulator unit for my 2010/11 Boxster Spyder 3.4DFI 320HP car please?
Last year, once a month or so, it would take three or four attempts to start up my 987.2 Cayman. Until then, as I turned the key, there was no clicking or other sounds, no dashboard lights, just nothing. The OPC switched out the alternator. I always suspected that was overkill. Apparently it is.
Lots of threads on DIY if you're that I climbed on changing the voltage regulator on boxa.net
https://www.westlancsautoelectrics.co.uk/
this outfit has also been used a few times for refurb.
Fink-Nottle said:
Last year, once a month or so, it would take three or four attempts to start up my 987.2 Cayman. Until then, as I turned the key, there was no clicking or other sounds, no dashboard lights, just nothing. The OPC switched out the alternator. I always suspected that was overkill. Apparently it is.
It always start without an issue because the battery is not the problem, its when it is running it the electric supply can come and go like flicking a light switch rapidly and to keep going you have to crawl along as giving it some gas then makes the engine cut out too due to the car have no electric supply at all as I guess when it revs the voltage regulator/alternator is not working as expected.
Some days its trouble free, other days its not but it seems to be happening more often now.
I am going to try swapping out the regulator see if that sorts it and make sure earth strap and all power cables are firmly secured.
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