That's what failed on mine due to water intrusion. Controls the ALC functions in the headlights. When it failed, the LCM disabled power to the Xenon lights on the LHS. Needed to use the workaround to get power back at the LHS headlight. I replaced the module a long time ago but never "reinitialized" or whatever procedure in INPA until much later. I did not have adaptive lighting functionality work again until after doing that reset or initialization.

Wish I had more specific info for you on the procedure but my E53 is stuck outside while I finish a trans replacement on our E70 diesel. Otherwise I'd plug in the power supply and fire up INPA to have a look.

Edit: Swap those modules from one headlight to the other and make sure they are both still good. If you see any corrosion on the connector... DON'T swap it and assume it's fried. Cheap to replace. I think I bought 2 for $40.

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2005 X5 4.4i Build 04/05 Maintenance/Build Log
Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles)

2006 X5 4.8is Build 11/05 Maintenance/Build Log
Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles)

2010 X5 35d Build 02/10
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