Xenon retrofit MK4 caddy

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vnox
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Posts: 7
Joined: Mon Aug 25, 2025 10:39 am
Engine size/power: 2.0 CR TDI (108bhp)

Re: Xenon retrofit MK4 caddy

Post by vnox »

Got them working 💪
I have a list of what bytes you need to change to get them working . So if anyone needs it , let me know !
davoc220
Caddy Fan
Posts: 67
Joined: Fri May 23, 2025 12:12 pm

Re: Xenon retrofit MK4 caddy

Post by davoc220 »

Hand to know, my drl and sidelight stopped working last week, I’m having to replace the module when it arrives tomorrow


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VWMxVan
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Posts: 25
Joined: Tue Sep 02, 2025 8:00 pm
Engine size/power: 2.0 TDI (140bhp)
Location: Manchester

Re: Xenon retrofit MK4 caddy

Post by VWMxVan »

vnox wrote: Thu Nov 13, 2025 4:31 pm I have upgraded my caddy also with original bi xenons
But only the the running lights and high beam works .
Drls and inner light doenst work and get a fault code .

Can i use this also on Bcm pq35 m+ 122 0193 ?

Already have tried to activate them with vcds but the longcoding doesn't seem to work ? ? If i check them on and do the coding . And then go back to the helper nothing is changed ? Somebody any idea whats the problem here ?
Sorry for late reply.

For me with the helper it saved and applied asked me if I was sure because of changing one of the blocks that you cant revert cant remember off the top of my head which one it was but it should save when you apply the coding.

It took a few goes on my caddy the DRL didnt work initially but this is the code that worked fully for me may be worth sending the code in selecting lights off and on again or ignition off and back on?

Sorry I cant be more help
MK4 caddy pure grey, OZ ultraleggera, 6 speed box 140 ecu.
KTM 250 EXCF Six Days
MK3 Clio RS200 ( Meglio) 340bhp track orientated.
VWMxVan
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Posts: 25
Joined: Tue Sep 02, 2025 8:00 pm
Engine size/power: 2.0 TDI (140bhp)
Location: Manchester

Re: Xenon retrofit MK4 caddy

Post by VWMxVan »

Scotscad wrote: Thu Nov 06, 2025 4:04 pm Image


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Looks absolutely class that apolagies i haven't been replying been away with work but mega glad you got it sorted 👍
MK4 caddy pure grey, OZ ultraleggera, 6 speed box 140 ecu.
KTM 250 EXCF Six Days
MK3 Clio RS200 ( Meglio) 340bhp track orientated.
Scotscad
100BHP+
Posts: 159
Joined: Wed Sep 04, 2024 12:23 pm
Engine size/power: 2.0 CR TDI (108bhp)

Re: Xenon retrofit MK4 caddy

Post by Scotscad »

Thanks mate. I used the code u posted up and everything works as it should cheers. I also had a sticky main beam shutter but took the bulb out and manually moved the shutter a good few times and now no more sticking. Lights are a good upgrade over the standard halogens. Would like to try upgrading to 35w to make them even better at some point in the future.
Last edited by Scotscad on Tue Dec 02, 2025 12:25 pm, edited 1 time in total.
davoc220
Caddy Fan
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Joined: Fri May 23, 2025 12:12 pm

Re: Xenon retrofit MK4 caddy

Post by davoc220 »

Mine have LEDs and now that their almost right, the difference is literally night and day, and plug n play on the xenon’s
rhyre
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Joined: Tue Nov 25, 2025 7:00 pm

Re: Xenon retrofit MK4 caddy

Post by rhyre »

Anyone tried fitting full LED from 2k8 to 2k5 body? I have original h4 bulbs
davoc220
Caddy Fan
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Joined: Fri May 23, 2025 12:12 pm

Re: Xenon retrofit MK4 caddy

Post by davoc220 »

Might be worth trying, the lights are expensive tho
Scotscad
100BHP+
Posts: 159
Joined: Wed Sep 04, 2024 12:23 pm
Engine size/power: 2.0 CR TDI (108bhp)

Re: Xenon retrofit MK4 caddy

Post by Scotscad »

Or you could buy the xenons that TMG are doing now that are plug and play. Dont need coding in.
Kolorrestore
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Posts: 24
Joined: Fri Jul 14, 2023 8:01 pm
Engine size/power: 1.6 CR TDI (102bhp)

Re: Xenon retrofit MK4 caddy

Post by Kolorrestore »

hopefully someone can help I'm converting my mk3 facelift to mk4 got the mk4 bi xenon lights they all work
but not sure if right

when switch on 0 position the drls are bright
auto drl is bright on inside and fade out on outside
same on main light the drls fade on the outer

think it's a coding issue
but was also thinking is it anything to do with the twin filament drl bulbs in halogen headlight

pickling my head 😂
STP
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Joined: Wed Jan 29, 2025 7:01 pm
Engine size/power: 1.6 CR TDI (102bhp)

Re: Xenon retrofit MK4 caddy

Post by STP »

I'd love xenons on my facelift MK3, do the headlights fit properly from the MK4 or did you change the front end?
2015 SWB Van, 1.6 CR TDI with Cruise Control, Heated Mirrors, Highline Clocks & MFD, VW Hands Free Bluetooth, Electric Windows, Reversing Cameras, DPF Monitor, Thatcham Cat 2.

My build thread: White MK3 Facelift

My DPF Monitoring Device thread: DPF Monitor
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