My 2006 4.2SC had the nearside front half shaft come out on the M3 a coupe of weeks ago. recovered to a range rover specialist local to me, he replaced the half shaft with new. it happened again on the test drive, so he replaced it with another new one, happened again, replaced the clips again with new, happened again. car was dropped back to me early this week. first time i drove it today got about 6 miles to pick my daughter up and it failed again. car is being recovered in the morning, but there seems to be an issue here with the half shaft coming out of the diff.

has anyone experienced this problem before?

Yes, sound familiar.
I had that, look over here

https://www.fullfatrr.com/forum/topic55527.html

thank you very much Piet

indeed the garage ordered an optimal shaft. just spoken with them they have the original shaft. i had new boots put on it 18 months ago, they are going to refit the old OEM with new clips

really appreciate your response and original post.