Coding process for downgrading xenon to halogen E91?

jayzus73 · 08-20-2023, 08:50 AM

Good afternoon,
My wife has an E91/320D touring from 2009/10.
Both headlight lenses have been cracked or broken in the last few months, they are Xenon but came with the car so not sure which type they are.
She isnt fussed on xenon or halogen so i took the cheaper option and got a new set of halogen headlights.
Succesfully removed old ones and replaced with the new units, everything works except the high beams on both. I get high beam indicator on dash cluster when triggered but no high beam. No other error messages on car monitor or with INPA.
I am guessing i need to re code the ecu back to halogen settings but have not been able to find any info on such, only for upgrades!
I have PC laptop running windows 10, KDcan cable and the BMW tools downloaded already.
Can anyone help with this?

Thanks in advance!

sdbmwcoding · 08-20-2023, 01:40 PM

Remove vehicle order option $522 (xenon) and $524 (adaptive), FA write to CAS and NFRM, recode FRM.

You will most likely need wiring changes as well, going from halogen > xenon requires wiring so the inverse should be true as well. You can confirm with newtis or a copy of ista. You’ll want to pull wiring schematics for halogen and xenon and compare.

jayzus73 · 08-24-2023, 06:23 AM

thanks! will look into it.

08-20-2023, 08:50 AM	#1
jayzus73 Registered 0 Rep 3 Posts Drives: 2009 E91 Join Date: Aug 2023 Location: mallorca spain iTrader: (0)	Coding process for downgrading xenon to halogen E91? Good afternoon, My wife has an E91/320D touring from 2009/10. Both headlight lenses have been cracked or broken in the last few months, they are Xenon but came with the car so not sure which type they are. She isnt fussed on xenon or halogen so i took the cheaper option and got a new set of halogen headlights. Succesfully removed old ones and replaced with the new units, everything works except the high beams on both. I get high beam indicator on dash cluster when triggered but no high beam. No other error messages on car monitor or with INPA. I am guessing i need to re code the ecu back to halogen settings but have not been able to find any info on such, only for upgrades! I have PC laptop running windows 10, KDcan cable and the BMW tools downloaded already. Can anyone help with this? Thanks in advance!
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08-20-2023, 01:40 PM	#2
sdbmwcoding Captain 196 Rep 803 Posts Drives: BMW M3 Join Date: May 2019 Location: San Diego iTrader: (0)	Remove vehicle order option $522 (xenon) and $524 (adaptive), FA write to CAS and NFRM, recode FRM. You will most likely need wiring changes as well, going from halogen > xenon requires wiring so the inverse should be true as well. You can confirm with newtis or a copy of ista. You’ll want to pull wiring schematics for halogen and xenon and compare.
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08-24-2023, 06:23 AM	#3
jayzus73 Registered 0 Rep 3 Posts Drives: 2009 E91 Join Date: Aug 2023 Location: mallorca spain iTrader: (0)	thanks! will look into it.
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