{"product_id":"dorman-m390071-brake-master-cylinder","title":"Dorman M390071 Brake Master Cylinder","description":"\u003ch2\u003eOverview of Dorman Brake Master Cylinder M390071\u003c\/h2\u003e\u003cp\u003eThe Dorman Brake Master Cylinder M390071 is designed specifically for Jeep Cherokee, Grand Cherokee, and Wrangler models. This cast iron master cylinder includes a reservoir and features precise outlet threading to ensure reliable brake hydraulics performance.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMaster cylinder bore diameter: 1 inch\u003c\/li\u003e\n\u003cli\u003eConstructed from durable cast iron material\u003c\/li\u003e\n\u003cli\u003eIncludes reservoir for brake fluid\u003c\/li\u003e\n\u003cli\u003eTwo outlets with rearward outlet size M10 x 1.0 and secondary outlet thread diameter M12 x 1.0\u003c\/li\u003e\n\u003cli\u003eThread pitch of 1.0 for secure fitting\u003c\/li\u003e\n\u003cli\u003eMounting hardware not included\u003c\/li\u003e\n\u003cli\u003ePackage contains the master cylinder only\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe Dorman M390071 brake master cylinder is engineered to meet the hydraulic braking needs of Jeep Cherokee, Grand Cherokee, and Wrangler vehicles. Its 1-inch bore diameter provides consistent hydraulic pressure, while the cast iron construction offers strength and durability under demanding conditions. The included reservoir simplifies installation and maintenance by providing a ready-to-use brake fluid container. With two outlets featuring specific thread sizes (M10 x 1.0 rearward outlet and M12 x 1.0 secondary outlet), this master cylinder ensures compatibility with the brake lines of the specified Jeep models. The 1.0 thread pitch further guarantees a secure and leak-free connection.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestores proper brake fluid pressure for Jeep Cherokee, Grand Cherokee, and Wrangler\u003c\/li\u003e\n\u003cli\u003eReplaces worn or leaking master cylinders causing brake pedal sponginess\u003c\/li\u003e\n\u003cli\u003eSolves brake fluid reservoir leaks or contamination issues\u003c\/li\u003e\n\u003cli\u003eAddresses brake failure symptoms related to master cylinder wear\u003c\/li\u003e\n\u003cli\u003eImproves brake system reliability and safety\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure brake system is properly bled after installation to remove air\u003c\/li\u003e\n\u003cli\u003eVerify thread sizes (M10 x 1.0 and M12 x 1.0) match vehicle brake lines before installation\u003c\/li\u003e\n\u003cli\u003eMounting hardware is not included; reuse existing hardware or source separately\u003c\/li\u003e\n\u003cli\u003eInspect brake lines and fittings for wear or damage during replacement\u003c\/li\u003e\n\u003cli\u003eFollow vehicle manufacturer torque specifications for secure installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDorman manufactures the M390071 brake master cylinder to meet or exceed OEM standards for Jeep Cherokee, Grand Cherokee, and Wrangler models. The cast iron construction and precise machining ensure durability and reliable performance. While mounting hardware is not included, the product is backed by Dorman's quality control processes. Please refer to Dorman's official warranty policy for specific coverage details.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":43792096821429,"sku":"BKKX-M390071","price":141.81,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DB_M390071_Fro.jpg?v=1774997544","url":"https:\/\/www.partcatalog.com\/products\/dorman-m390071-brake-master-cylinder","provider":"PartCatalog","version":"1.0","type":"link"}