Jim R Albany , OR February 11, 2019 Appliance: Bosch Washer WFMC6400UC/01 Bosch Washer Wfmc6400uc/01: Error code e 04. How to replace Drain Pump Motor Assembly. Replaced the drain pump in my Bosch washer, and cleaned all the waterlines and connection. Do-It-Yourself Rating: Repair Time Estimate: 30-60 minutes