{"product_id":"dorman-m39846-brake-master-cylinder","title":"Dorman M39846 Brake Master Cylinder","description":"\u003ch2\u003eDorman M39846 Brake Master Cylinder\u003c\/h2\u003e\u003cp\u003eThe Dorman M39846 brake master cylinder is a direct replacement for select 1988 Toyota 4Runner and Toyota Pickup applications. Built with a cast iron body, integrated reservoir, and sensor provision, it is engineered to match the original master cylinder’s design, function, and performance.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eDirect replacement brake master cylinder for select Toyota vehicles\u003c\/li\u003e\n\u003cli\u003eCast iron master cylinder construction for durable service\u003c\/li\u003e\n\u003cli\u003eReservoir included for a complete hydraulic assembly\u003c\/li\u003e\n\u003cli\u003eSensor included for vehicles equipped with the original sensor setup\u003c\/li\u003e\n\u003cli\u003e0.938 in. bore diameter for OE-style brake pedal and hydraulic response\u003c\/li\u003e\n\u003cli\u003eTwo outlet design with M10 x 1.0 rearward outlet thread\u003c\/li\u003e\n\u003cli\u003ePart number M39846 for easy identification and ordering\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Description\u003c\/h2\u003e\u003cp\u003eDorman M39846 is precision-engineered to replicate the original master cylinder used on specific Toyota brake systems. It is made from new, high-quality materials and built to restore proper hydraulic pressure delivery in the brake system. This part cross-references Beck\/Arnley 072-8371 and Centric Parts 130.44406 for the same application. Compatible with 1988 Toyota 4Runner and 1988 Toyota Pickup, this brake master cylinder is a practical OE-style replacement when the original unit is worn, leaking, or no longer maintaining consistent pedal feel.\u003c\/p\u003e\u003ch2\u003eCommon Issues It May Solve\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBrake fluid leakage from a worn master cylinder body or seals\u003c\/li\u003e\n\u003cli\u003eSoft, sinking, or inconsistent brake pedal feel\u003c\/li\u003e\n\u003cli\u003eLoss of hydraulic pressure in the brake system\u003c\/li\u003e\n\u003cli\u003eBrake warning light concerns related to master cylinder sensor function\u003c\/li\u003e\n\u003cli\u003eReduced braking performance caused by internal master cylinder wear\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eBefore installation, verify bore diameter, outlet thread size, and sensor connection against the original unit. Bench bleed the master cylinder before connecting brake lines to help remove trapped air from the hydraulic circuit. Because mounting hardware is not included, reuse or source the correct hardware as needed. After installation, inspect all brake line connections for leaks and bleed the full brake system according to the vehicle service procedure.\u003c\/p\u003e\u003ch2\u003eQuality Assurance\u003c\/h2\u003e\u003cp\u003eDorman designs this master cylinder to match the original part’s fit and function using new materials for dependable replacement service. The M39846 is built for specific Toyota brake applications and is intended to support consistent hydraulic performance in the brake system.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":52401882103989,"sku":"BKKX-M39846","price":129.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DB_M39846_Fro.jpg?v=1777759989","url":"https:\/\/www.partcatalog.com\/products\/dorman-m39846-brake-master-cylinder","provider":"PartCatalog","version":"1.0","type":"link"}