I searched around, but could not get a definitive answer on this.

Looking at Pelican, it appears that the replacement bulb for the stock litronic xenon headlights are D1S bulbs.

But when I search on the web and rennlist, it looks like they are D2S.

Can someone confirm which bulb is correct?

Did the bulb types change depending on what year your car was? I have a '96 C4S.

 

In the Porsche parts catalog, both are listed in different part number headlights.
To confirm, on the bosch site as well, they list two different headlights with either of the bulbs.
google bosch e-cat and try to check, but exact date of change to D2S is vague.
Happened to me, so I took the headlight out to check.
To remove the bulb on mine was tricky, and needed a small lock tab to be bent.
If you stick on removing the bulb, let me know, I could maybe take some pictures.
I replaced my bulbs for fun, but found that the new bulbs were chinese knock offs, so I reverted to the originals.

 

Thanks geolab.

So it sounds like Porsche transitioned from D1S to D2S over time? Given both are listed and it's not clear which you have unless you take your bulb out from the headlight to double check.

If you don't mind taking some photos, that'd be awesome. Do you have D1S or D2S bulbs?

 

I have the D1S

 

Looks like I have the D2S after I opened up my headlights. Anyone need brand new D1S bulbs?

 

I re-checked, and found that I have the D2S as well, headlight version 2.0

 

Thanks. I'm curious what the OEM D2S bulb replacement should be.

I can't seem to find it online because most sites refer to D1S bulbs.

Porsche 993 Xenon Headlight OEM Bulb Osram D2S Part number : 999 631 035 90 -- points to D1S bulbs.

Anyone had to replace their stock litronic bulbs?

 

Looks like I found my answer:

https://rennlist.com/forums/993-foru...ps-w-35-a.html

 

In my car today are two different bulbs.Osram D2S - 35W 6y5/184
The Osram site recomends Zenarc Original with Model# 66240 at 3200 lumins lm flux +- and 4100 colour or 66240CLC- classic. Then newer brighter bluer options which may create additional heat and subsequently effect headlight bracket leading to warpage?
And my 2nd bulb Philips 85123. Replacent D2SC1 at 3400 lumens with 4200 colour
Anyone know what is original?
or what # kelvins bulbs should be?
Thinking buying either are adequate and yes I read should be replaced in pairs.

Porsche - Sunset shows part # same bulb works in 40 car models to 2013.
what is bulb capacity for wiring?
Do not want to burn a wire or burnout a circuit.
Could one go brighter on oem 1997 technology?
TJ

 

The Xenon headlight bulbs are production original in my Litronic HL optioned 1998 Carrera S.. Early September 1997 production.. I'll have a look tonight when at the coupe.

 

I thought the factory bulbs were more bluish - closer to 5K Kelvin. I'd get a matching set with a Kelvin value around 5K. 6K would be too blue for me, and under 4K isn't blue enough.

If you want bright, go with Tore's LED high beams (Bergville FX) and it will rock your world. If you buy the LED high beam make sure you get the one for Litronics because they mount differently.

I wouldn't upgrade the litronic low beam bulb wattage or anything like that from factory. New bulbs will be brighter than your old ones. They lose brightness over time.

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OEM is 4300K

 

Thank You Sir!!

 

Tore said NO Upgrade for my 97
The Colour of either bulb is 4100 or 4200

Litronic Low beam HID info below:
Osram D2S > web info states 6 Options on Bulbs. Osram Zenarc Original and Osram Zenarc Classic. Colour is closer to 4100 lumen
Product line: XENARC CLASSIC D2S Order number 66240CLC
ECE Category D2S
Technical data
85.0 V 35.00 W P32d-2
https://www.osram.com/apps/gvlrg/
and
Philips

Xenon Standard Automotive Headlight 85122C1 SPECS 3400 Lumens 1500/2500 4200 colour Philips

https://www.usa.philips.com/c-p/85122C1/xenon-standard-automotive-headlight

I would like to understand Capacity - Know zero about electrical!!
My issue No Power is Fuse 23 - 15 Amp Litronic fuse.
Hoping just a dead bulb?
So will order one bulb and hopefully see what happens next?
Yes I read buy in pairs But the Osram still working after 10 years so will buy another.
If happy will order a second Osram shortly thereafter.
I have the brochure on Tequipment - headlights in my car file
Or if the bulb does not solve my issue it means I am on to the switch next
Welcome ideas here

 

What does "no upgrade" mean?

If the fuse it good, the only thing to try is to fiddle with the electrical connection where the headlamp connects to the car.

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