Industrial 29903-C Hydraulic Master Cylinder Assembly

Industrial 29903-C Hydraulic Master Cylinder Assembly is an aftermarket replacement part designed to replace OEM master cylinders labeled with the 29903-C casting number. The 29903-C designation appears across brands, including Raybestos (MC39011) and Wagner (F105876), indicating this casting-number family is used by multiple manufacturers. This assembly is marketed as a 29903-C aftermarket replacement, so compatibility should be confirmed by cross-referencing the vehicle’s OEM part number and its year, make, and model to ensure alignment with the 29903-C designation. As a 29903-C replacement, it is intended to restore hydraulic brake pressure to the specifications of the original unit bearing that casting number, with mounting orientation, port configuration, and reservoir integration varying by application. When selecting this part, consult current listings for exact fitment details and follow standard brake-fluid handling and system-bleeding procedures after installation.