Betty S Rapid River , MI August 28, 2015 Appliance: KitchenAid 5-Speed Blender KSB5ER4 Kitchenaid Blender Ksb5er4: Needed replacement kitchen aid blender drive coupler. How to replace Blender Drive Coupler. My husband put it in. He said nothing to it. I'm happy, I have my blender working again!!:) Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes