Miguel L El Paso , TX August 06, 2016 Appliance: KitchenAid 5-Speed Blender KSB5ER4 Kitchenaid Blender Ksb5er4 / : My wife's 5 speed kitchen aid blender is at least nine years old and it needed a new drive coupler because the blades were not turning she didn't want to replace it. How to replace Kitchen Aid Blender Drive Coupler. I ordered the Coupler and another Dome and Blade assembly. When the parts were delivered, which happened very fast, as promised, my wife performed the repair. She was happy! 1 People found this story helpful Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes