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Units manufactured Before May 1997 5 Wires -Cap off extra 2 wires with wire nuts (not included).","features":["Genuine Broan Nutone Central Vacuum Relay Repair Kit","Part Number S0521B000","Fits Models: 352, CV350, CV352, CV353, CV550, CV553, CV353W CV400 CV400C CV450W, CV-450W For:Twin Relay CV400 & CV450:Blue Wire IS WHITE, Red WIRE IS YELLOW.","Units manufactured Before May 1997 5 Wires -Cap off extra 2 wires with wire nuts (not included) ."]}]},"metadata":{"generated_date":"2026-09-16","last_updated":"2026-09-16","data_sources":["Platt.com","Amazon"],"completeness":0.9,"version":"1.2"}}},"pagination":null,"nav":{"home":"/python/html6/index.html","brands":"/python/html6/menu_brand_index/menu_brand_index_brands_87101ba214.html","parts":"/python/html6/menu_part_index/menu_part_index_parts_909e6bf0ca.html","attributes":"/python/html6/menu_attr_index/menu_attr_index_attributes_d7f67a250d.html"}}