{"product_id":"dorman-m630853-brake-master-cylinder","title":"Dorman M630853 Brake Master Cylinder","description":"\u003ch2\u003eReliable Brake Master Cylinder for Honda Civic\u003c\/h2\u003e\u003cp\u003eThe Dorman M630853 brake master cylinder is engineered to restore proper brake hydraulics in your Honda Civic. Designed with precision, this aluminum master cylinder ensures consistent brake fluid pressure for safe and responsive braking performance.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eCompatible with Honda Civic models requiring a 0.9375-inch bore diameter master cylinder\u003c\/li\u003e\n\u003cli\u003eConstructed from durable aluminum for corrosion resistance and longevity\u003c\/li\u003e\n\u003cli\u003eFeatures two mounting holes for secure installation\u003c\/li\u003e\n\u003cli\u003eIncludes two outlets with a rearward outlet thread size of M10 x 1.0 and a thread pitch of 1.0\u003c\/li\u003e\n\u003cli\u003eRemovable reservoir type for ease of maintenance (reservoir not included)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Details and Specifications\u003c\/h2\u003e\u003cp\u003eThe Dorman M630853 brake master cylinder is designed specifically for Honda Civic vehicles, providing a precise fit and reliable function. This part features a 0.9375-inch bore diameter, which is critical for maintaining proper hydraulic pressure in the brake system. The master cylinder is made from aluminum, offering a balance of strength and corrosion resistance. It includes two mounting holes to ensure a secure attachment to the brake booster or firewall. The unit has two outlets, with the secondary outlet thread diameter measuring 10 mm and a rearward outlet size of M10 x 1.0, both with a thread pitch of 1.0. Note that this master cylinder does not include mounting hardware, brake booster, reservoir, push rod, bleeder hoses, sensor, or mounting bracket.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Problem Resolution\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestores brake fluid pressure in Honda Civic brake systems\u003c\/li\u003e\n\u003cli\u003eReplaces worn or leaking master cylinders causing brake pedal sponginess\u003c\/li\u003e\n\u003cli\u003eAddresses brake fluid leaks from the master cylinder body or seals\u003c\/li\u003e\n\u003cli\u003eImproves brake response and pedal feel in vehicles with degraded master cylinders\u003c\/li\u003e\n\u003cli\u003eSuitable for brake system rebuilds requiring a precise bore diameter and outlet configuration\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the Dorman M630853 brake master cylinder, ensure the mounting surface is clean and free of debris. Use the two mounting holes to securely fasten the unit, but note that mounting hardware is not included and must be sourced separately. Since the reservoir is not included, transfer the existing reservoir or install a compatible replacement. Bleed the brake system thoroughly after installation to remove air and ensure proper hydraulic function. Verify thread sizes (M10 x 1.0) for brake line fittings to avoid compatibility issues.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDorman manufactures the M630853 brake master cylinder to meet or exceed OEM specifications for fit and function. The aluminum construction provides durability and resistance to corrosion, contributing to long service life. While specific warranty details are not provided here, Dorman typically offers limited warranties on their brake hydraulic components to cover defects in materials and workmanship.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":52089079988405,"sku":"BKKX-M630853","price":125.23,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DB_M630853_Fro.jpg?v=1775148259","url":"https:\/\/www.partcatalog.com\/products\/dorman-m630853-brake-master-cylinder","provider":"PartCatalog","version":"1.0","type":"link"}