Brembo Brake Pad Wear Indicator Sensor for BMW X3 (F25) 3.0D (2011-2017) and X4 (F26), also compatible with Porsche Cayenne (92A). This sensor is designed for the front left position with a disc brake system. It features a length of 955 mm and includes one wear indicator per axle. Cross-references include A.B.S. 39687, APEC BWR5087, BENDIX 581500, BOSCH 1987473511, and FEBI BILSTEIN 37437. Please use the vehicle make and model tool to ensure compatibility before purchasing.