This part is listed by BMW as BMW part number 64115A4FF59 (64-11-5-A4F-F59) and is described as Genuine BMW Fine Dust Cabin Microfilter for U11 X1 28i, M35i (2023+).
BMW Fitments:
X1 Series
U11 X1 (2023+) > X1 xDrive28i B48P (2023+)
U11 X1 (2023+) > X1 xDriveM35i B48R (2023+)
