I just replaced the D1S bulbs on my 2011 X5d. It is a pain in the ass. It is obvious that the headlight was not designed for easy service or access. I've been spoiled by my E39 all these years.

You might not have to actually remove the wheel well liner but you will definitely have to remove the dozen or so SINGLE-USE plastic rivets that hold the liners (front and rear) and fender flares on. Once these are removed, remove the 20 or so 8mm bolts and three 10mm plastic nuts.

On the left side, I removed only the front part of the liner. The mistake was completely removing it especially since it goes UNDER the rear part of the liner. I ended up having to take out the rest of the rivets and bolts and nuts for the rear part and then putting it all back together right. This required a trip to the dealer once I realized that the plastic rivets cannot be reused.

I learned from the left side and so on the right side, while the flare and rivets have to be removed and I did remove all of the other fasteners, front and rear, I did not actually remove the liners from the vehicle. With the fasteners removed, I was able to easily bend the liners out of the way and get to the bulb. This made installation amazingly easier and faster. One thing you'll need is plastic rivet gun or a technique to install them. I settled on needle nose pliers, Vise-Grips and lineman's pliers. By the end I got pretty good at setting the rivets.

I saw the LEDs and their heat sinks but didn't put my eyes on the module. Probably have to remove the headlight to do those. Like others said, if it's both halos then it's probably the control module which is also located on the bottom of the headlight.

I have pictures that I took of the rivets and what I saw once I removed everything along with the P/N for the rivets that I can post later.

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8/2011 X5 xDrive35d Sport, Black Sapphire Metallic, Black Nevada Leather, Fine Burr Walnut Trim
2/2001 M5, Jet Black, Exclusive Complete Black Walk Nappa Point Heritage Leather, Black Cubic Trim