Dennis A Vallejo , CA July 23, 2018 Appliance: KitchenAid 5-Speed Blender KSB5OB4 Kitchenaid Blender Ksb5ob4: Blender drive coupling failed. How to replace Blender Drive Coupler. Contacted Kitchenaid who advised they didn't carry the replacement coupling but gave me 3 reference sources of which you were the first I contacted and ordered the coupling. It arrived via USPS within a couple of days. The plastic bag containing the coupling had an official appearing Kitchenaid logo and clear installation instructions. I would recommend APP.com. The sales rep on the phone was very helpful. Do-It-Yourself Rating: Repair Time Estimate: Less than 15 minutes