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    Thread: HowTo: OEM Bi-Xenon/OEM Fog Lights/CECM Upgrade/LED Euro Tails in a 2010 Jetta Sedan

    1. Member AMD IS THE BEST's Avatar
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      12-29-2010 12:59 AM #1
      For those who may be interested in what is involved in upgrading their 2010 Jetta TDI Sedan (DSG in my case) to OEM Bi-Xenons, OEM Fog lights (controlled by the CECM), CECM Upgrade, and European Hella LED Tail lights with rear fog light this is my write up. Please let me know if you find anything out of place and I'll modify it.

      Link to PDF: http://njsphoto.com/doctemp/Bi-Xenon%20Upgrade.pdf

      Hope this helps!
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    2. Member TXRanger83's Avatar
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      12-29-2010 03:41 AM #2
      Nice write up! I look forward to doing this in the future
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    3. Member StreamlineGT's Avatar
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      12-29-2010 08:55 AM #3
      I look forward to this as well. No chance my 2010 TDI has a high line CECM already, huh? I guess I don't really understand the differences.

    4. Member b0mb3r's Avatar
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      12-29-2010 09:13 AM #4
      awesome thanks...i thought that the 2010 TDI already came with the highline CECM

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      12-29-2010 10:19 AM #5
      question....i didnt read the whole thing and i probably would have , but the oem hid retrofit was w/ or w/o the auto levelers...
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      12-29-2010 12:48 PM #6
      This is awesome - It was always a pain to find info on the Bi-Xenon swap. The MKVI electronics in the 2010 Jetta throws a wrench in everything...

      Question - Do you are anyone else have any idea if the Wolfsburg's require a CECM swap as well?

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      12-29-2010 12:56 PM #7
      For step 15.b.ii the byte to change is not defined, there is just a yellow highlight, like maybe you meant to fill that in later. Is that right?

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      12-29-2010 01:02 PM #8
      Also - how did you locate the proper CECM?

      I guess what I'm mainly wondering is if the CECM is exclusive to the MKVI electronics, or if a MKV will work as well (are they the same?)

    9. Member TXRanger83's Avatar
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      12-29-2010 03:05 PM #9
      Quote Originally Posted by Comatose View Post
      Also - how did you locate the proper CECM?

      I guess what I'm mainly wondering is if the CECM is exclusive to the MKVI electronics, or if a MKV will work as well (are they the same?)
      You can either go down and pull out the CECM to find the part # or do an auto scan with VCDS which will also give you the part number. I have yet to come across any 2010 sedan with a highline CECM, due to no GLI being built, so its a good guess you have a low line. If your CECM ends in 085 its lowline, what you need is the part # that ends in 087.

      Also a mkV CECM will not work because we have an integrated CECM/CCU while all other mkV had two separate controllers.
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      12-29-2010 03:16 PM #10
      Quote Originally Posted by TXRanger83 View Post
      You can either go down and pull out the CECM to find the part # or do an auto scan with VCDS which will also give you the part number. I have yet to come across any 2010 sedan with a highline CECM, due to no GLI being built, so its a good guess you have a low line. If your CECM ends in 085 its lowline, what you need is the part # that ends in 087.

      Also a mkV CECM will not work because we have an integrated CECM/CCU while all other mkV had two separate controllers.
      Dang it - Mine ends in 085, so looks like mine isnt special.

      Thanks for your info - Very helpful!

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      12-29-2010 04:26 PM #11
      That CECM seems to be pretty difficult to find - not too many MKVI Highline CECM's floating around...

      OP - how did you find yours?

    12. Member StreamlineGT's Avatar
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      12-29-2010 04:31 PM #12
      Balls, mine is a lowline also.

    13. 12-30-2010 10:43 AM #13
      wow that is a pretty big project, thanks very much for going through the time to provide the write-up

    14. Moderator 83Caddy16v's Avatar
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      12-30-2010 11:39 AM #14
      Would the TDI Cup Jetta have the highline CECM?
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      12-30-2010 11:58 AM #15
      Quote Originally Posted by 83Caddy16v View Post
      Would the TDI Cup Jetta have the highline CECM?
      Hopefully someone has posted a scan of theirs in the forums somewhere to confirm, but I would think not

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      02-16-2011 09:27 PM #16
      Great write up.
      Just one advice. As far as setting up TPMS. 24 psi this threshold is way too low. For example my Jetta WE requires 35 psi front and rear so you want to keep tire pressure within 10% margin of error which is 3.5 psi. So in this example low pressure threshold should be set to 31 psi. 24-30 psi will cause an excessive tire wear!

    17. Member AMD IS THE BEST's Avatar
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      02-16-2011 09:56 PM #17
      Quote Originally Posted by WhiteWolfie10 View Post
      Great write up.
      Just one advice. As far as setting up TPMS. 24 psi this threshold is way too low. For example my Jetta WE requires 35 psi front and rear so you want to keep tire pressure within 10% margin of error which is 3.5 psi. So in this example low pressure threshold should be set to 31 psi. 24-30 psi will cause an excessive tire wear!
      It's in bar... 2.4 bar = 34.8psi. Thanks for looking out though.
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      02-17-2011 06:05 PM #18
      My bet sorry. Didn't pay attention.
      Last edited by WhiteWolfie10; 02-19-2011 at 08:58 PM.

    19. Member keving's Avatar
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      04-20-2011 07:13 PM #19
      You are my hero!

      So glad I finally found this. I've been pulling my hair out trying to figure out how to add front & rear fogs to my mkV with mkvi electronics!

      If I make it New York, I'm buying you a beer! Hell, how about the entire bar?


    20. Member AMD IS THE BEST's Avatar
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      04-22-2011 11:39 PM #20
      Quote Originally Posted by keving View Post
      You are my hero!

      So glad I finally found this. I've been pulling my hair out trying to figure out how to add front & rear fogs to my mkV with mkvi electronics!

      If I make it New York, I'm buying you a beer! Hell, how about the entire bar?

      Haha, sounds good man! Glad it helped you out!
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    21. Member keving's Avatar
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      04-28-2011 05:34 PM #21
      Epic fail.

      Fogs don't work. I followed everything verbatim.

      Supposedly I didn't need to switch out the CECM.

      Part number from VCDS - 5K0 937 085 G

      I was told that if the computer accepts the codes, then I'm okay.

      It accepts fog lights in the computer and throws a light bulb out for both front and left fogs. I counted and thought the pins were missing from the CECM. I'm probably right about that.

      I'll recheck the pins for the right numbers, recheck the ground, and recheck the trigger wire.

      The dealership has no idea what I want. The part number you have for the highline supersedes the system four times over. And they don't believe me that my mkv has the mkvi wire harness.

      This is madness. I'm completely lost! Any ideas? Can you help?


    22. Member keving's Avatar
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      04-28-2011 05:36 PM #22
      Is this true?

      "Asked ross tech about it today, 084 is base, 085 is low 086 mid and 087 is highline, according, quite funny, I just asked ross tech about it today, 084 is base, 085 is low 086 mid and 087."

    23. Member AMD IS THE BEST's Avatar
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      04-28-2011 07:06 PM #23
      Your 085 module is a low line and is NOT capable of running fog lights. The pins are not present (they weren't in my L anyway) yet the CECM can accept the coding which will also create the faults. Double check and make sure there are actually pins there and also that you are on the correct ones.

      Your car certainly has a MK6 CECM (part number matches mine) and it is 100% low line. The part number that I used in my car has been superseded several times but I know that mine works and I really can't comment on if the newer ones will (although I would believe that they should). Try to get a hold of the one I have but even so, I think so far I am the only one who has successful got EVERYTHING to work without errors even with the same exact setup.

      084 - never heard of it...
      085 - low
      086 - mid
      087 - high
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    24. Member keving's Avatar
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      04-28-2011 08:57 PM #24
      Okay, so it's confirmed I am lowline. That's a start.

      I'll double check everything tomorrow when I have light. We'll see from there.

      Next question, where did you pick up the highline? The parts guy at the dealership practically had a panic attack when I asked for the part number. He gave me a bunch of units all ranging from $100 -$500. I work around a body shop, so it would be convenient to go through them. But I'd rather just order it straight.

      1stvwparts.com has a partial part number match. Not sure how much the last three matter. (5K0937087C000)

      BoraParts doesn't list anything anymore.

      Couldn't find anyone else.

      What do you think? I'll track one down after I double check my parts.

      Hopefully this will solve my euro tail parking light issue, too.


    25. Member AMD IS THE BEST's Avatar
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      04-28-2011 09:02 PM #25
      Quote Originally Posted by keving View Post
      Okay, so it's confirmed I am lowline. That's a start.

      I'll double check everything tomorrow when I have light. We'll see from there.

      Next question, where did you pick up the highline? The parts guy at the dealership practically had a panic attack when I asked for the part number. He gave me a bunch of units all ranging from $100 -$500. I work around a body shop, so it would be convenient to go through them. But I'd rather just order it straight.

      1stvwparts.com has a partial part number match. Not sure how much the last three matter. (5K0937087C000)

      BoraParts doesn't list anything anymore.

      Couldn't find anyone else.

      What do you think? I'll track one down after I double check my parts.

      Hopefully this will solve my euro tail parking light issue, too.

      I got mine from Paul a Keffer VW on here. He had no problem getting it and to me in less then a week.
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    26. Member keving's Avatar
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      04-28-2011 09:15 PM #26
      Thanks again. I was looking there as you said that.

      I'll see what I can do.

      And I'll let you know how I work out.

      Hopefully I can sort through this mess.

    27. Member AMD IS THE BEST's Avatar
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      04-28-2011 09:24 PM #27
      Quote Originally Posted by keving View Post
      Thanks again. I was looking there as you said that.

      I'll see what I can do.

      And I'll let you know how I work out.

      Hopefully I can sort through this mess.
      No prob man. I hope you get everything all squared away too!
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    28. Member keving's Avatar
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      05-09-2011 08:11 PM #28
      I think this says it all! Thanks for all your help man. The DIY was perfect and all of your recommendations worked out for me!

      I'm just not sure on the fog brightness. My mkIII put out light, but not so much with these fogs. Hmm.

      Now off to fix the SUV status . . .




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      10-10-2011 05:16 PM #29
      Hi AMD,

      Ecs tuning is selling 5K0937087c for $250. Is that the same as 5k0-937-087-C-ZOX? I have the same low line cecm 5K0 937 085 L as you did before you upgraded to 5k0-937-087-C-ZOX. I want to upgrade to high line cecm 5k0-937-087-C-ZOX so i can install the hella cherry red led tail with rear fog without getting any fault codes.

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      10-10-2011 05:17 PM #30
      Address 09: Cent. Elect. (J519) Labels: 1K0-937-08x-09.clb
      >> Part No SW: 5K0 937 085 L HW: 5K0 937 085 L
      >> Component: BCM PQ35 B++ 111 0135
      >> Revision: BI111001
      >> Coding: 2D200B3E902D3EE4800800814000000405000086500085605C 8020000000
      >> Shop #: WSC 00066 123 12345
      >> VCID: 3C7D26D706F0
      >> Part No: 1K1 955 119 F
      >> Component: Wischer 30071 21 0512
      >> Coding: 009795
      >> No fault code found.

    31. Member AMD IS THE BEST's Avatar
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      12-12-2011 04:41 PM #31
      Important update has been made to the original document regarding correct repair wires. I had so many part numbers flying around it was hard to keep them all straight.
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