{"product_id":"dorman-m390398-brake-master-cylinder","title":"Dorman M390398 Brake Master Cylinder","description":"\u003ch2\u003eReliable Brake Master Cylinder for Ford, Lincoln, Mazda, and Mercury\u003c\/h2\u003e\u003cp\u003eThe Dorman M390398 Brake Master Cylinder is engineered to restore proper brake hydraulics in select Ford, Lincoln, Mazda, and Mercury vehicles. Designed with precision, this master cylinder includes a reservoir and sensor to ensure optimal brake system performance.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMaster cylinder bore diameter: 1.063 inches for accurate hydraulic pressure\u003c\/li\u003e\n\u003cli\u003eConstructed from durable aluminum material for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eIncludes reservoir and sensor for integrated brake fluid management\u003c\/li\u003e\n\u003cli\u003eFour outlets with rearward outlet sizes M10 x 1.0 and M12 x 1.0\u003c\/li\u003e\n\u003cli\u003eSecondary outlet thread diameter: M10 x 1.0 and 3\/8-24\u003c\/li\u003e\n\u003cli\u003eCompatible with Ford Aviator, Escape, Explorer, Ranger; Lincoln Aviator, Mountaineer; Mazda B2300, B2500, B3000, B4000; Mercury Mountaineer\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eProduct Features and Specifications\u003c\/h2\u003e\u003cp\u003eThe Dorman M390398 brake master cylinder is crafted from aluminum, providing a lightweight yet robust component that resists corrosion and wear. Its 1.063-inch bore diameter ensures consistent hydraulic pressure for reliable braking response. This unit comes complete with an integrated reservoir and sensor, facilitating accurate fluid level monitoring and system feedback. Featuring four outlets, including rearward outlet sizes of M10 x 1.0 and M12 x 1.0, and secondary outlet threads of M10 x 1.0 and 3\/8-24, it supports complex brake line configurations found in various Ford, Lincoln, Mazda, and Mercury models.\u003c\/p\u003e\u003ch2\u003eApplications and Common Brake System Issues\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestores brake pressure loss due to worn or damaged master cylinder\u003c\/li\u003e\n\u003cli\u003eEliminates brake fluid leaks from faulty seals or reservoir\u003c\/li\u003e\n\u003cli\u003eResolves brake pedal sinking or sponginess caused by internal cylinder wear\u003c\/li\u003e\n\u003cli\u003eAddresses sensor-related brake warning light issues\u003c\/li\u003e\n\u003cli\u003eImproves overall brake system responsiveness and safety\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eInstallation of the Dorman M390398 master cylinder requires careful attention to brake fluid handling and bleeding procedures. Since mounting hardware is not included, ensure you have the correct bolts and fittings for your specific vehicle model. Properly connect all four outlets according to the vehicle’s brake line layout, and verify sensor connections for accurate brake system monitoring. After installation, thoroughly bleed the brake system to remove air and confirm firm pedal feel before driving.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty Information\u003c\/h2\u003e\u003cp\u003eDorman manufactures the M390398 brake master cylinder to meet or exceed OEM standards for fit, form, and function. The aluminum construction and integrated sensor contribute to long-term durability and reliable operation. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in material and workmanship to provide confidence in your replacement part.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":43792162324661,"sku":"BKKX-M390398","price":96.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DB_M390398_Fro.jpg?v=1774997583","url":"https:\/\/www.partcatalog.com\/products\/dorman-m390398-brake-master-cylinder","provider":"PartCatalog","version":"1.0","type":"link"}