Weber publishes official parts diagrams on their support site (weber.com/support) — search your model number (find it on the inside of the lid, on a sticker near the bowl handle, or on the original purchase paperwork). Common Performer model numbers: 15401001 (Performer Premium), 15501001 (Performer Deluxe), 1501870 (2026 Performer Smart). Once you have the model number, Weber's diagram shows every screw, hinge, and component with its part number.
For the 8 most-replaced parts (cooking grate, charcoal grate, ash catcher, lid damper, lid handle, thermometer, covers, casters), see the categorized sections below. Each part includes the official Weber part number, what it fits, and an Amazon search link to current pricing. For specialty parts not listed (specific bolts, brackets, decorative elements), Weber's support team at 1-800-446-1071 can confirm part availability for any model since the 1990s.