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Check manual

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Suggestion
Have you checked your manual?
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Leading evidence: 'Check manual' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check manual' (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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Use d1s bulbs

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

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Suggestion · Original poster
One of my factory xenon bulbs burnt out today so I search Sylvaia and it said that my 2003 C4S uses D1S bulbs.
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Check manual

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
Have you checked your manual?
Original post Read captured discussion
Quick question.

Use d1s bulbs

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
One of my factory xenon bulbs burnt out today so I search Sylvaia and it said that my 2003 C4S uses D1S bulbs.
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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.

8 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: 20261026T124918Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources

POST 1 / ORIGINAL POSTEROriginal post

One of my factory xenon bulbs burnt out today so I search Sylvaia and it said that my 2003 C4S uses D1S bulbs. So I went out and purchased a set. Turns out the ones in my headlights are completely different. Any idea what bulb is in there from the factory? D2S, D2R etc? Thanks in advance!

POST 2Original post

Have you checked your manual? It has all of the bulb specs. Do you have bi-xenon?

POST 3 / ORIGINAL POSTEROriginal post

The manual just gives me a Porsche part number. I do not have bi-xenon.

POST 4Original post

Are you sure you have Xenons? The regular headlights are projectors.

POST 5Original post

Quotes source post: 4708179

Here is a copy of the bulb specs from teh '04 manual. The right hand column gives the general bulb specs (i.e. Type & Rating).

POST 6Original post

Is there an easy way for me to tell what kind of lights are on my '02 C4 cab? The car didn't come w/ a window sticker, so I'm speculating on options...

POST 7Original post

Quotes source post: 4708365

If they look like this (see pic) they are bi-xenon lights. The silver disk is a dead give away. It is the cover for the headlight washers, which are required for xenon lights.

POST 8 / ORIGINAL POSTEROriginal post

I know for sure I got HID/Xenon lights from the factory. I also have the silver/chrome discs on my lights Thanks for that spec sheet. Sylvania's website is totally wrong.. they say it's a D1S when in reality it's really a D2S thanks for the clarification! So if anyone does a search or needs to know.... the HID bulbs in our cars is a "D2S"

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