I believe you replaced a number of items already but below are some posts with similar 'clunking' issues that I researched when I was troubleshooting mine.....there is great material here - just read through those.....

https://xoutpost.com/bmw-sav-forums/...left-side.html

https://xoutpost.com/bmw-sav-forums/...ks-x5-e70.html

https://xoutpost.com/bmw-sav-forums/...-hit-bump.html

https://xoutpost.com/bmw-sav-forums/...ssemblies.html

https://xoutpost.com/bmw-sav-forums/...end-clunk.html

https://xoutpost.com/bmw-sav-forums/...build-diy.html

https://xoutpost.com/bmw-sav-forums/...ive-drive.html

Several threads pointed to the #8 and #10 as primary culprits as well as sway bar links and the lower control arm - engine mounts was my "last" item to test (less likely to be the cause)

1. #8 and #10
2. Sway Bar Links (and Sway Bar Supports)
3. Lower Control Arms
4. Loose Brake Pads
5. Front Axle / Bearing / Diff.
6. Loose radiator
7. Engine Mounts

.....

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E70 - 3.0si & F10 - 535ix
Previous Cars:
E34 - 525i, E39 - 530i, E60 - 530i