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Go Back   E46Fanatics > Tuning & Tech > Lighting Forum

Lighting Forum
Angel Eyes, DDEs, lighted rings, Clear Turn Signals, LEDs, Xenon, HID, or Bi-Xenon. If it lights up and you want to discuss it, post here!

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Old 12-10-2014, 07:16 PM   #1
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What Would Happen if I Coded my Halogens to Xenon?

So I'm going to be performing the projector retrofit on my '03 325i soon (Just got the projectors in!) and I was going to get the car coded for Xenon.

Now my question is, if I get it coded for xenon, will my halogens still work? Will I miss anything up? I was going to go get it coded tomorrow or somesuch, but I don't have my Morimoto HID kit yet. Will anything fry, and will my headlights still function normally, and will my cluster be okay?

Will coding my car for Xenon/HID and keeping halogens in it mess anything up?
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Old 12-10-2014, 09:22 PM   #2
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Correct me if I'm wrong but I don't think you need to code them if you're going aftermarket.
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Old 12-10-2014, 10:16 PM   #3
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From everything I read, you do because of the bulb-out errors and possible flickering. Or you need to buy some kind of cancelers, but those seem to be hit or miss, and I would rather just do it right.

But if I code my car for Xenon, will my halogens still work fine?
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Old 12-11-2014, 07:53 AM   #4
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They should still work from my best guess. Coding to xenon means adjusting how the LCM receives sends/voltages etc. Give it a shot but you should be fine for a day or so until you install the projectors
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Old 12-11-2014, 09:03 AM   #5
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Had the morimoto retrofit on my 330 from retrofitsource. Didn't have to code anything.
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Old 12-11-2014, 09:08 AM   #6
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Don't go cheap on ballasts. It'll start screwing up your instrument cluster, buzzing/dead-needles. I think that's related to the ballast's poor design to work with halogen set ecus.
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Old 12-11-2014, 03:37 PM   #7
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Going with Morimoto stuff, which isn't cheap.

Thanks for the replies guys!
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Old 12-22-2014, 02:00 PM   #8
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Just installed my OEM Xenons yesterday for the Facelift Coupe. I coded the halogen LCM w/ BMW Scanner to Bi-xenon and Xenon with Auto HVAC. Only thing happened is that the computer disabled the manual HVAC on the LCM.

(HVAC= Headlight Vertical Aim Control)

Last edited by duss46; 12-22-2014 at 02:01 PM.
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Old 12-25-2014, 05:36 AM   #9
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I had morimoto retrofit on my 1999 328i from retrofitsource, I got bulb-out errors when Xenons is off, when turned ON the error goes. I did code my car for Xenon/HID using SSS\Progman and got off the error, but I had problem in the auto leveling start not functioning well. it's okay for me any way.
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