{"product_id":"dorman-m101258-brake-master-cylinder","title":"Dorman M101258 Brake Master Cylinder","description":"\u003ch2\u003eReliable Brake Master Cylinder for Buick, Cadillac, and Pontiac\u003c\/h2\u003e\u003cp\u003eThe Dorman M101258 brake master cylinder is engineered to restore proper brake hydraulics in select Buick, Cadillac, and Pontiac models. Designed with a cast iron body and a 1.125-inch bore diameter, this master cylinder ensures consistent brake fluid pressure for safe and effective braking performance.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCast iron master cylinder material for durability\u003c\/li\u003e\n\u003cli\u003eIncludes reservoir for brake fluid\u003c\/li\u003e\n\u003cli\u003e1.125-inch bore diameter for precise hydraulic control\u003c\/li\u003e\n\u003cli\u003eTwo outlets with secondary outlet thread diameter of 0.5 inches\u003c\/li\u003e\n\u003cli\u003eRearward outlet size of 9\/16-18 for secure connections\u003c\/li\u003e\n\u003cli\u003eCompatible with Buick DeVille, Cadillac Fleetwood, Seville, and more\u003c\/li\u003e\n\u003cli\u003ePart number M101258 for accurate replacement\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThis Dorman brake master cylinder (part number M101258) is designed specifically for brake hydraulics systems in various Buick, Cadillac, and Pontiac vehicles, including the DeVille, Firebird, Fleetwood, LeSabre, Riviera, and Seville models. Constructed from cast iron, the master cylinder offers strength and resistance to wear, ensuring long-lasting performance. The included reservoir simplifies brake fluid management, while the 1.125-inch bore diameter provides the correct hydraulic pressure needed for effective braking. Featuring two outlets, including a rearward outlet sized 9\/16-18 and a secondary outlet with a 0.5-inch thread diameter, this master cylinder supports proper brake line connections without the need for additional sensors or mounting hardware.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestores brake fluid pressure in hydraulic brake systems\u003c\/li\u003e\n\u003cli\u003eReplaces worn or leaking master cylinders causing brake failure\u003c\/li\u003e\n\u003cli\u003eEliminates spongy or unresponsive brake pedal feel\u003c\/li\u003e\n\u003cli\u003eFixes brake fluid leaks from the master cylinder reservoir\u003c\/li\u003e\n\u003cli\u003eEnsures proper brake function in Buick DeVille, Cadillac Seville, and Pontiac Firebird models\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure compatibility with your vehicle’s make and model before installation\u003c\/li\u003e\n\u003cli\u003eBleed the brake system thoroughly after installation to remove air\u003c\/li\u003e\n\u003cli\u003eUse recommended brake fluid type for your vehicle\u003c\/li\u003e\n\u003cli\u003eCheck all brake line connections for leaks after installation\u003c\/li\u003e\n\u003cli\u003eProfessional installation is advised for safety and performance\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDorman manufactures this brake master cylinder to meet or exceed OEM specifications for fit and function. While mounting hardware is not included, the part is designed for direct replacement in compatible Buick, Cadillac, and Pontiac models. Please consult Dorman’s warranty policy for coverage details on part number M101258.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":51915815944373,"sku":"BKKX-M101258","price":71.53,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DB_M101258_Fro.jpg?v=1774997532","url":"https:\/\/www.partcatalog.com\/products\/dorman-m101258-brake-master-cylinder","provider":"PartCatalog","version":"1.0","type":"link"}