Bmw 2005 525i oil level sensor

[Convoy]

New to me E61 525i. Had an issue with the oil level reading. Looked like a faulty oil level sensor. Changed under aftermarket warranty, genuine bmw part. Same problem arises.

Car shows Inconsistent readings. Car idling shows good oil level 3 quarters full. Drive the car 10 miles and reading shows needing to add 1 litre. Does not show any intermediate readings.

Any suggestions Initially I topped up and the reading does increase. I get the same increase if I leave the car stationary for 48hrs.

No obvious extreme oil use or leakage.

Any ideas

[SebringMan]

Do you still have a dipstick on this or is it still dipstickless?

From what I understand the bonnet needs to be closed on some modern cars for the oil reading to be "reset/remeasured".

[Convoy]

Unfortunately no other dips tickets.