{"product_id":"dorman-m39976-brake-master-cylinder","title":"Dorman M39976 Brake Master Cylinder","description":"\u003ch2\u003eReliable Brake Master Cylinder for Nissan D21, Pathfinder, and Pickup\u003c\/h2\u003e\u003cp\u003eThe Dorman M39976 brake master cylinder is engineered to restore proper brake hydraulics for Nissan D21, Pathfinder, and Pickup models. Designed with precision, this aluminum master cylinder includes a reservoir and sensor to ensure consistent braking performance.\u003c\/p\u003e\u003ch2\u003eKey Features of the Dorman M39976 Brake Master Cylinder\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eMaster cylinder bore diameter: 1 inch for accurate hydraulic pressure\u003c\/li\u003e\n\u003cli\u003eDurable aluminum construction for corrosion resistance and longevity\u003c\/li\u003e\n\u003cli\u003eIncludes reservoir for fluid storage and easy maintenance\u003c\/li\u003e\n\u003cli\u003eEquipped with a sensor to monitor brake system status\u003c\/li\u003e\n\u003cli\u003eThree outlets with a rearward outlet size of M10 x 1.0 and thread pitch of 1.0\u003c\/li\u003e\n\u003cli\u003eSecondary outlet thread diameter of 10 mm for secure connections\u003c\/li\u003e\n\u003cli\u003ePackage contains the master cylinder only; mounting hardware not included\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe Dorman M39976 brake master cylinder is specifically designed for Nissan D21, Pathfinder, and Pickup vehicles, providing a direct replacement for the original component. Its 1-inch bore diameter ensures proper hydraulic pressure is maintained throughout the brake system. Constructed from aluminum, this master cylinder offers enhanced durability and resistance to corrosion, which is critical for maintaining brake system integrity over time. The included reservoir simplifies brake fluid management, while the integrated sensor allows for real-time monitoring of brake system performance. With three outlets and precise thread specifications, this master cylinder supports secure and reliable brake line connections.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestores brake hydraulic pressure for Nissan D21, Pathfinder, and Pickup models\u003c\/li\u003e\n\u003cli\u003eReplaces worn or leaking master cylinders causing brake fluid loss\u003c\/li\u003e\n\u003cli\u003eFixes brake pedal sponginess or failure due to internal cylinder wear\u003c\/li\u003e\n\u003cli\u003eResolves sensor-related brake warning light issues\u003c\/li\u003e\n\u003cli\u003eAddresses corrosion or damage to original aluminum master cylinders\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 pitch (1.0) and outlet sizes (M10 x 1.0) match vehicle brake lines\u003c\/li\u003e\n\u003cli\u003eUse appropriate brake fluid as specified by Nissan for your model\u003c\/li\u003e\n\u003cli\u003eMounting hardware is not included; reuse original hardware or source separately\u003c\/li\u003e\n\u003cli\u003eCheck sensor connections carefully to maintain brake warning system functionality\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty Information\u003c\/h2\u003e\u003cp\u003eDorman manufactures the M39976 brake master cylinder to meet or exceed OEM specifications for Nissan D21, Pathfinder, and Pickup vehicles. The aluminum construction and integrated sensor are tested for durability and performance. While mounting hardware is not included, the product is backed by Dorman's quality standards. Please refer to Dorman's warranty policy for specific coverage details.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":43789374390453,"sku":"BKKX-M39976","price":100.46,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DB_M39976_Fro.jpg?v=1774997514","url":"https:\/\/www.partcatalog.com\/products\/dorman-m39976-brake-master-cylinder","provider":"PartCatalog","version":"1.0","type":"link"}