The driver-side fuel float keeps breaking on the 4.6.

The last two times the potentiometer card was shattered. I havent opened it yet but that's probably the case again now.

What could be causing this?

Closest I could see online is Z3's having this issue because of clogged tank vent valves and charcoal filters?

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04 X5 3.0i auto
03 X5 4.6is