Headlight Module Question
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Headlight Module Question
Hello, I recently purchased a 991.2 Porsche GT3RS from auction and there is only one headlight that is missing including the modules.
If I purchase the exact same part number headlight with used modules will porsche be able to program those modules to my car?
If anyone has any experience with this, please let me know.
Thank you.
If I purchase the exact same part number headlight with used modules will porsche be able to program those modules to my car?
If anyone has any experience with this, please let me know.
Thank you.
Rennlist Member
Joined: Jul 2016
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From: Whidbey Island / PNW
Aim them using the 6 mm hex to set cutoff height and you’re done. There’s no coding required if you put in a used module with the same equipment/car/part # - at least there wasn’t on my 2013 C2S when I swapped headlights with the same from another car.
I don’t know for certain if you buy a new one if that has to be coded btw but when I was looking into this 2 years ago, I’m pretty sure that the advice I got was that CAN bus only checks that the same lighting components are present for your factory options (so if you’re shaping from PDLS to PDLS+ or LED, yes, that would need some sort of PIWIS intervention).
I don’t know for certain if you buy a new one if that has to be coded btw but when I was looking into this 2 years ago, I’m pretty sure that the advice I got was that CAN bus only checks that the same lighting components are present for your factory options (so if you’re shaping from PDLS to PDLS+ or LED, yes, that would need some sort of PIWIS intervention).
Last edited by Nashvegas; Jan 7, 2026 at 10:43 PM.
RL Community Team
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From: Minnesota
there is a nonzero chance that the VIN is coded to the module and it will not work as a means of theft protection.
if that is the case, you will need proof of your legal purchase and to take it in to a dealership for coding.
if that is the case, you will need proof of your legal purchase and to take it in to a dealership for coding.
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How sure are you about that? When I swapped out headlights w/ new modules the lights worked but threw a code. The code was not for theft protection but more for the modules options not matching up with the car. You can code the module to your cars specifications using a Piwis tool and the codes will not show up any more.
RL Community Team
Rennlist Member
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Joined: Dec 2013
Posts: 7,595
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From: Minnesota
How sure are you about that? When I swapped out headlights w/ new modules the lights worked but threw a code. The code was not for theft protection but more for the modules options not matching up with the car. You can code the module to your cars specifications using a Piwis tool and the codes will not show up any more.
did you swap out from a used car from a wrecker/junkyard? or did you buy from somewhere like suncoast?
Burning Brakes
Joined: Apr 2014
Posts: 880
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From: NYC
How sure are you about that? When I swapped out headlights w/ new modules the lights worked but threw a code. The code was not for theft protection but more for the modules options not matching up with the car. You can code the module to your cars specifications using a Piwis tool and the codes will not show up any more.
I installed used OEM headlights from a .2 on my .1 and never saw any codes. Even after rewiring the harness to make the .2 four-point LED's to work.
