The brake pad wear sensor is a key safety component that allows worry-free driving without the need for constant visual inspection of your brake pad material. Once the brake lining dash light is illuminated on your dash, this is a warning of thin brake pad material. Pads should be replaced as soon as possible, and the sensor is a required replacement once the brake lining dash has come on.
This part is listed by BMW as BMW part number 34356891419 (34-35-6-891-419) and is described as Genuine BMW Front Brake Pad Wear Sensor for 2023+ U11 X1 & 2024+ U10 X2.
BMW Fitments:
X1 Series
U11 X1 (2023+) > X1 xDrive28i B48P (2023+)
U11 X1 (2023+) > X1 xDriveM35i B48R (2023+)
X2 Series
U10 X2 (2024+) > X2 xDrive28i B48P (2024+)
U10 X2 (2024+) > X2 xDriveM35i B48R (2024+)