These are the ones I bought. They come in 2 flavors. 4 flat LEDs and 3 LEDs with different angles. He bought the 4 flat, I got the 3 angled. Directional visibility would be the only real difference between them I would imagine. Mine have been on since 2017. Both styles are ~$30 on Ebay.

https://www.ebay.com/itm/BAR-Autotec...8AAOSwdGFY0Nw-

You can also buy them from Bimmian now for $30. They used to be $50 a couple of years ago which is why I bought them on Ebay.

https://bimmian.com/led-side-lenses-...es-lci-e53-x5/

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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
Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles)