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THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHHID bulb thread: High/Low bulbs identical?
Leading reported evidence
Replace d2s bulbs last year
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
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Read evidence and context
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Performed · outcome unconfirmed
I changed both D2S bulbs last year to new Jahn (OEM) bulbs and the difference was amazing, the old bulbs just barely lit anything up and the new are much better.
Leading evidence: 'Replace d2s bulbs last year' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace d2s bulbs last year' (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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Performed · outcome unconfirmed
Below that projector, there is another H7 bulb that is used for flash and for high beam ( when you have the high beam connected, you will have both bulbs on, the HID and the H7)
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
Bonus question(s): Is it a) possible and b) good or bad (pros and cons) to use different D2S bulbs in there (i.e.
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Suggestion
996.1 litronics uses a h7 bulb for the secondary high beam, there is nothing on the market to swap that bulb to a HID.
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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Replace d2s bulbs last year
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that performed work without a confirmed outcome
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.
Performed · outcome unconfirmed
I changed both D2S bulbs last year to new Jahn (OEM) bulbs and the difference was amazing, the old bulbs just barely lit anything up and the new are much better.
Discussions that performed work without a confirmed outcome
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.
Performed · outcome unconfirmed
Below that projector, there is another H7 bulb that is used for flash and for high beam ( when you have the high beam connected, you will have both bulbs on, the HID and the H7)
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
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Generation: 20261027T011819Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
For a 996.2 / 2003 car:
Yes - I did use the search function. And yes, I watched the FCP Euro video on replacement. What I couldn't get an
undeniably clear
answer on is if the high-beam and low-beam lamps are the same on the HID unit. In the video, they reference that the bulbs for both beams are identical in the case of the Halogen unit. They make no reference to the HID unit.
Bonus question(s): Is it a) possible and b) good or bad (pros and cons) to use different D2S bulbs in there (i.e. in the case they are identical). Thinking of doing Osram Night Breakers D2S in the low beam and Philips XV2s D2S in the high beam.
Any takers? Thanks so much!
996.1 litronics uses a h7 bulb for the secondary high beam, there is nothing on the market to swap that bulb to a HID. There are options to swap to a h7 LED replacement, but if you're interested in better high beam performance the money would be better spent on a retrofitlabs bi-xenon projector replacement (porscheretrofits.com is a forum member and US supplier if you are in the states). I put osram cool blue h7s in for my highs to try and better match the color profile without swapping to LEDs.
I have 996.2 Litronics and they are the same bulbs. D2S main beam and H7 auxiliary high beam. I changed both D2S bulbs last year to new Jahn (OEM) bulbs and the difference was amazing, the old bulbs just barely lit anything up and the new are much better.
There is only one HID bulb (D2S)
Maybe what has confused you is the fact that in the 996.2, the HID projector, is used for both, low and high beam (there is a diaphragm in front of the HID bulb) that opens for high beam and closes for low beam). Below that projector, there is another H7 bulb that is used for flash and for high beam ( when you have the high beam connected, you will have both bulbs on, the HID and the H7)
FWIW, the single D2s with the shutter is usually referred to as a "Bi-Zenon" bulb in catalogs, the non shutter is simply a Zenon.
The shutter is magnetically activated in most installs.
Hid's work in very few standard fixtures, they normally require specific reflectors and lenses to avoid being harsh on the other oncoming drivers.
FYI - I just changed out the bulbs (Low/high beam and the auxiliary H11 high beam bulb). I went with Osram Night Breaker D2S and
Sylvania
H11 SilverStar Ultra. In addition, I had a local detailing shop do a headlight restoration treatment on the outer housing.
The difference is, pun intended, night and day. This is such great light distribution and intensity, night time driving is a bliss. The 996 now has better light than my BMW X7 with the laser lights.
This is a source reference. Confirm exact model applicability in the original material.
