Raybestos WC37871 Drum Brake Wheel Cylinder Rear

Raybestos WC37871 is a rear drum brake wheel cylinder built for Nissan/Infiniti drum-brake systems, converting hydraulic pressure into linear actuation that pushes the brake shoes against the drum to slow or stop the vehicle. Sold under the Element3 line, this cylinder serves as a direct replacement for Raybestos part 2037871 and is listed for multiple Nissan/Infiniti models, including the 1990–1994 Nissan D21 rear, the 1995–1997 Nissan Pickup rear, the 1996–1998 Nissan Pathfinder rear, the 1998–2002 Nissan Frontier rear, and the 1997 Infiniti QX4 rear. The WC37871 designation identifies it specifically as a rear-wheel cylinder, used to restore proper shoe expansion and braking performance on vehicles featuring rear drum brakes.