Mike M Centennial , CO October 10, 2022 Appliance: KitchenAid 5-Speed Blender KSB5ER4 Kitchenaid Blender Ksb5er4 / : Blender coupler was broken. How to replace Blender Drive Coupler. The part arrived at my door in Denver about 24 hours after ordering. I pried the old coupler off the shaft with a screwdriver. Cleaned the aluminum fragments from the threads, screwed on the new coupler -- that was it. Easy. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes