1. Product Overview JWBR1938161B is a premium automotive water pump shaft bearing with one-piece shaft and rolling structure. It is pre-filled with high-temperature grease and equipped with reliable double seals, designed for continuous rotation in engine cooling pump assemblies. This bearing is a perfect replacement for aftermarket repair and OEM pump production. Get a quote within 24 hours for your project 2. Key Advantages All-in-one shaft design simplifies pump assembly