{"product_id":"dorman-m390342-brake-master-cylinder","title":"Dorman M390342 Brake Master Cylinder","description":"\u003ch2\u003eReliable Brake Master Cylinder for Nissan Pathfinder and Infiniti QX4\u003c\/h2\u003e\u003cp\u003eThe Dorman M390342 brake master cylinder is engineered to restore proper brake hydraulics in your Nissan Pathfinder or Infiniti QX4. Designed with precision, this aluminum master cylinder includes a reservoir and sensor to ensure consistent brake performance.\u003c\/p\u003e\u003ch2\u003eKey Features of the Dorman M390342 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\u003eConstructed from durable aluminum material for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eIncludes reservoir for fluid storage and sensor for system monitoring\u003c\/li\u003e\n\u003cli\u003eTwo outlets with secondary outlet thread diameter of 10 mm and rearward outlet size M10 x 1.0\u003c\/li\u003e\n\u003cli\u003eThread pitch of 1.0 ensures secure fitting\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 M390342 brake master cylinder is specifically designed for use in Nissan Pathfinder and Infiniti QX4 models, providing a direct replacement for the original component. Its aluminum construction offers durability and resistance to wear, while the included reservoir and sensor support proper brake fluid management and system feedback. The master cylinder features a 1-inch bore diameter, which is critical for maintaining the correct hydraulic pressure needed for effective braking. With two outlets, including a secondary outlet thread diameter of 10 mm and a rearward outlet size of M10 x 1.0, this part ensures compatibility with the brake hydraulic system of the specified vehicles.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestores brake hydraulic pressure for improved braking response\u003c\/li\u003e\n\u003cli\u003eReplaces leaking or damaged master cylinders causing brake fluid loss\u003c\/li\u003e\n\u003cli\u003eResolves brake pedal sinking or sponginess due to internal seal failure\u003c\/li\u003e\n\u003cli\u003eAddresses sensor-related brake system warnings or malfunctions\u003c\/li\u003e\n\u003cli\u003eCorrects issues with brake fluid reservoir leaks or contamination\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure brake fluid system is properly bled after installation to remove air\u003c\/li\u003e\n\u003cli\u003eVerify thread pitch and outlet sizes match vehicle specifications before installation\u003c\/li\u003e\n\u003cli\u003eMounting hardware is not included; reuse original hardware or source separately\u003c\/li\u003e\n\u003cli\u003eHandle the sensor connection carefully to avoid damage during installation\u003c\/li\u003e\n\u003cli\u003eConsult vehicle service manual for torque specifications and installation procedures\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty Information\u003c\/h2\u003e\u003cp\u003eDorman manufactures the M390342 brake master cylinder to meet or exceed OEM standards for fit, form, and function. The aluminum construction and integrated sensor contribute to reliable brake system performance. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in materials and workmanship. Refer to Dorman’s official warranty policy for complete terms.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":43792154951861,"sku":"BKKX-M390342","price":138.73,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DB_M390342_Fro.jpg?v=1774997574","url":"https:\/\/www.partcatalog.com\/products\/dorman-m390342-brake-master-cylinder","provider":"PartCatalog","version":"1.0","type":"link"}