{"product_id":"dorman-m39954-brake-master-cylinder","title":"Dorman M39954 Brake Master Cylinder","description":"\u003ch2\u003eBrake Master Cylinder Replacement\u003c\/h2\u003e\u003cp\u003eDorman M39954 is a brake master cylinder built to match the original design, function, and performance for specific applications. It uses new materials and an aluminum body to support a durable brake hydraulic repair.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e1-inch bore diameter for the specified brake system application\u003c\/li\u003e\n\u003cli\u003eAluminum master cylinder construction\u003c\/li\u003e\n\u003cli\u003eFour outlet ports for the correct hydraulic routing\u003c\/li\u003e\n\u003cli\u003eNo reservoir included\u003c\/li\u003e\n\u003cli\u003eNo sensor included\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eThis Dorman brake master cylinder is engineered as a direct-style replacement for vehicles that require the listed outlet configuration and 1-inch bore size. The part number M39954 is associated with Cadillac DeVille, Buick LeSabre, Oldsmobile 88, Oldsmobile Delta 88, and Pontiac Bonneville applications, including drum brake wheel cylinder setups noted in the fitment data. If you are replacing a worn or leaking master cylinder, M39954 provides the hydraulic control point needed to restore brake system operation.\u003c\/p\u003e\u003cp\u003eThis part cross-references Raybestos Brakes MC39954 for the same application.\u003c\/p\u003e\u003ch2\u003eWhat It Is Used For\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBrake fluid leakage at the master cylinder\u003c\/li\u003e\n\u003cli\u003eSoft or inconsistent brake pedal feel\u003c\/li\u003e\n\u003cli\u003eLoss of hydraulic pressure in the brake system\u003c\/li\u003e\n\u003cli\u003eReplacement of a worn original master cylinder\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eVerify bore diameter, outlet thread sizes, and reservoir requirements before installation. This master cylinder does not include mounting hardware, a reservoir, or a sensor. Match the vehicle’s brake line connections and bleed the hydraulic system thoroughly after installation.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eDorman states this master cylinder is precision-engineered to match the original part’s design and performance, and it is manufactured from new, high-quality materials for a durable replacement.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":53505772781749,"sku":"BKKX-M39954","price":145.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DB_M39954_Fro.jpg?v=1791700797","url":"https:\/\/www.partcatalog.com\/products\/dorman-m39954-brake-master-cylinder","provider":"PartCatalog","version":"1.0","type":"link"}