If you uninstall the oil level sensor from the oil pan and plan to reinstall the original unit you will need to replace this seal as it is one time use only.
Brand: ELRING
Product Nr: 115439ELR
inner diameter: 41 mm
height: 4 mm
Compatible with OEM numbers;
Audi 038 103 196
BMW 0 148 465
BMW 1 744 292
BMW 1261 0 148 465
BMW 1261 1 744 292
Porsche 038 103 196
Seat 038 103 196
Skoda 038 103 196
VW 038 103 196