If you are a Costco member, you can get 15% off parts, service, and accessories at participating dealerships. I have used it at my local Honda dealership. Costco auto buying program will send you an email with 15% off parts, accessories, and service voucher. I just show the parts guy my email when picking up my parts and my discount is applied at the checkout counter. My dealership does not require a printout, but I would print it out until you get to know your parts department or if it's your first time.