Quote:
Originally Posted by E30M3SE
The level sensor is located in the bottom of the sump, a little away from the drain plug, so waiting for an oil change would make sense.
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This is another common E46 fault and not exclusive to the M3 CSL, and as said before best changed @ an upcoming Oil & Filter Service

Pix below shows the oil level sensor and it's location, albeit on my old E46 320d

but you get the idea.