The product is a rear differential assembly with a gear ratio of 3:38 designed specifically for 2007-2013 BMW 1, 3 series models including E81, E87, E90, and E91. Manufactured by BMW in the United Kingdom, this rear differential with the manufacturer part number 7524319 is a crucial component for the transmission and drivetrain system of the vehicle. This high-quality replacement part ensures smooth and reliable operation of the vehicle's differential system, maintaining the performance and handling characteristics of the BMW series models it is designed for.