{"product_id":"dorman-m630409-brake-master-cylinder","title":"Dorman M630409 Brake Master Cylinder","description":"\u003ch2\u003eBrake Master Cylinder for Honda Prelude\u003c\/h2\u003e\u003cp\u003eThis Dorman brake master cylinder is built for 1990-1991 Honda Prelude applications with 15\/16-inch bore size drum brakes. It uses new aluminum construction, includes a reservoir and sensor, and is engineered to match the original master cylinder’s design, function, and performance.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eDirect replacement brake master cylinder for select Honda Prelude models\u003c\/li\u003e\n\u003cli\u003e0.938-inch bore diameter for the specified brake setup\u003c\/li\u003e\n\u003cli\u003eAluminum master cylinder body for durable service\u003c\/li\u003e\n\u003cli\u003eReservoir included for a complete hydraulic assembly\u003c\/li\u003e\n\u003cli\u003eSensor included\u003c\/li\u003e\n\u003cli\u003eTwo outlet design with M12 x 1.0 rearward outlet and 10 mm secondary outlet thread\u003c\/li\u003e\n\u003cli\u003ePart number M630409 for easy identification\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Overview\u003c\/h2\u003e\u003cp\u003eDorman M630409 is a brake master cylinder replacement for 1990-1991 Honda Prelude vehicles equipped with 15\/16-inch bore size drum brakes. It is precision-engineered to follow the original unit’s layout and hydraulic function, helping restore proper brake system operation with new, high-quality materials. The aluminum construction, integrated reservoir, and included sensor support a clean OE-style replacement for the Honda Prelude brake hydraulics system.\u003c\/p\u003e\u003cp\u003eThis part cross-references Centric Parts 130.40018 for the same application.\u003c\/p\u003e\u003ch2\u003eWhat This Part Helps Address\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBrake pedal travel that feels excessive or inconsistent\u003c\/li\u003e\n\u003cli\u003eLoss of hydraulic pressure in the brake system\u003c\/li\u003e\n\u003cli\u003eExternal leakage at the master cylinder body or outlets\u003c\/li\u003e\n\u003cli\u003eWarning light concerns related to the brake system sensor\u003c\/li\u003e\n\u003cli\u003eRestoration needs for a worn Honda Prelude master cylinder\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify bore size, outlet thread sizes, and vehicle brake configuration before installation. This Dorman M630409 master cylinder is supplied without mounting hardware, so reuse or source the required fasteners as needed. Bench bleeding the master cylinder before installation helps reduce trapped air and supports proper brake pedal feel after the system is bled.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eDorman designs this brake master cylinder as a direct-fit replacement for specific Honda Prelude applications, using new materials and OE-style engineering to match the original part’s function and performance. Confirm fitment for 1990-1991 Honda Prelude, and verify the 15\/16-inch bore drum brake application before ordering.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":52431298461877,"sku":"BKKX-M630409","price":137.72,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DB_M630409_Fro.jpg?v=1777853384","url":"https:\/\/www.partcatalog.com\/products\/dorman-m630409-brake-master-cylinder","provider":"PartCatalog","version":"1.0","type":"link"}