{"product_id":"dorman-m39871-brake-master-cylinder","title":"Dorman M39871 Brake Master Cylinder","description":"\u003ch2\u003eReliable Brake Master Cylinder Replacement\u003c\/h2\u003e\u003cp\u003eThe Dorman M39871 brake master cylinder is engineered to restore proper brake hydraulics performance in compatible vehicles. Designed with a durable cast iron construction and a 1.25-inch bore diameter, this master cylinder supports consistent brake pressure for safe stopping power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCast iron master cylinder material for durability\u003c\/li\u003e\n\u003cli\u003e1.25-inch bore diameter for precise hydraulic control\u003c\/li\u003e\n\u003cli\u003eTwo outlet ports with M10 x 1.0 rearward outlet thread size\u003c\/li\u003e\n\u003cli\u003eIncludes master cylinder only; reservoir and mounting hardware not included\u003c\/li\u003e\n\u003cli\u003eThread pitch of 1.0 for secure hydraulic line connections\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Details and Specifications\u003c\/h2\u003e\u003cp\u003eThe Dorman M39871 brake master cylinder features a cast iron body designed to withstand the rigors of brake system pressure and heat. Its 1.25-inch bore diameter ensures proper fluid displacement to maintain brake responsiveness. The unit includes two outlets, with the secondary outlet thread diameter measuring 10 mm and a rearward outlet size of M10 x 1.0, compatible with standard brake line fittings. This master cylinder does not include a reservoir or sensor, focusing solely on the hydraulic control component. The thread pitch of 1.0 ensures compatibility with corresponding brake line threads for a secure fit.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cp\u003eThis brake master cylinder is suitable for replacement in various vehicle makes and models requiring a 1.25-inch bore diameter master cylinder with dual outlets and M10 x 1.0 thread specifications. It is commonly used in brake hydraulic systems where a cast iron master cylinder is specified. For example, it is compatible with certain Ford, Chevrolet, and Dodge models that utilize similar brake master cylinder configurations. Always verify fitment with your vehicle's specifications before purchase.\u003c\/p\u003e\u003ch2\u003eCommon Brake System Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBrake pedal sinking or sponginess due to master cylinder wear\u003c\/li\u003e\n\u003cli\u003eBrake fluid leaks from worn or damaged master cylinder seals\u003c\/li\u003e\n\u003cli\u003eReduced braking efficiency caused by internal master cylinder failure\u003c\/li\u003e\n\u003cli\u003eInconsistent brake pressure affecting vehicle stopping distance\u003c\/li\u003e\n\u003cli\u003eBrake warning light activation related to hydraulic pressure loss\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eInstallation of the Dorman M39871 master cylinder requires proper brake system bleeding to remove air and ensure optimal hydraulic performance. Since mounting hardware and reservoir are not included, reuse existing components or source compatible parts separately. Verify thread pitch and outlet sizes to match brake lines. It is recommended to inspect brake lines and related components during installation for wear or damage.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDorman brake master cylinders are manufactured to meet or exceed OEM standards for fit, form, and function. The M39871 part number undergoes rigorous quality control to ensure reliable operation within brake hydraulic systems. Please consult Dorman's warranty policy for specific coverage details.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":51915815387317,"sku":"BKKX-M39871","price":200.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DB_M39871_Fro.jpg?v=1774997508","url":"https:\/\/www.partcatalog.com\/products\/dorman-m39871-brake-master-cylinder","provider":"PartCatalog","version":"1.0","type":"link"}