FormerE30Owner

[QUOTE=BostonJon;1578685]funny thing i just noticed today..the chrome shrouds on my projectors actually have "D2S" embossed on them. however, my bulbs are most definitely D1S.

It would appear that someone replaced the original D2S with the incorrect D1S. My projectors also show D2S and the it what I have, 2005 545. There is no need to disassemble the projectors to determine bulb type - its marked on the projectors!
Salut, Bob P.

cinergi

Good idea, I'll try that first. Don't have a pen mirror but I can borrow one of my wife's small makeup mirrors if needed :-) My chrome shrouds definitely don't have any writing on them, but it seems even that would not be definitive anyway as in your case. I have the non-adaptive HIDs; maybe the writing is only present on the adaptive version (if that's what you have).

cinergi

BostonJon

is that even possible to plug D2S bulbs into D1S sockets? are they really interchangeable? doesnt the D2S lack an integrated igniter?

cinergi

There is some writing on the top of the headlights (visible only with the hood open). In my case it includes the text "D1S / D2S", which suggests that it would indeed be possible to use either type of bulb in these lights.

I haven't gotten around yet to opening the round plastic cover behind the high beam bulb to try and see the HID low beam through the hole.

cinergi

rice_rocket88

You'd need an adapter to get the D2S into the D1S hole.. so it's not like it can't be done (which is part of the 55W conversion). It's certainly possible.. the easiest sort of way is to open that cover and see if the bulb has a huge square box (D1S) which is the difference.

rice_rocket88

https://www.google.com/search?q=diff...dEvnyYH9e1M%3A

cinergi

From these pictures, it looks like the D1S and D2S bulbs are identical, the only difference being that the D1S bulb is plugged into the igniter. Would it not be possible to simply pull the D1S bulb out of the ignitor and plug the D2S bulb in its place? In other words, reuse the same igniter with a new D2S bulb?

Thanks
cinergi

rice_rocket88

Um no.. the igniter is physically part of the D1S bulb, so you can't just pull it apart..

There is a ring piece that attaches the bulb to your housing, which has specific notches, so you can put the D2S bulb, but you need to get your own "adapter" to do so.. which again, is part of the conversion process.

So unless you're all set to do the conversion, you can't mix and match..

cinergi

I see. OK thanks!