{"product_id":"dorman-m12578-brake-master-cylinder","title":"Dorman M12578 Brake Master Cylinder","description":"\u003ch2\u003eOverview of the Dorman Brake Master Cylinder M12578\u003c\/h2\u003e\u003cp\u003eThe Dorman Brake Master Cylinder M12578 is designed for reliable brake hydraulics performance in select Mercury and Nissan vehicles. Specifically compatible with the Mercury Villager and Nissan Quest models, this master cylinder ensures precise brake fluid control for safe stopping power.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMaster cylinder bore diameter: 1 inch\u003c\/li\u003e\n\u003cli\u003eConstructed from durable aluminum material\u003c\/li\u003e\n\u003cli\u003eIncludes two outlets with a rearward outlet size of M10 x 1.0\u003c\/li\u003e\n\u003cli\u003eSecondary outlet thread diameter: 10 mm with a 1.0 thread pitch\u003c\/li\u003e\n\u003cli\u003ePackage contains the master cylinder only; mounting hardware and reservoir are not included\u003c\/li\u003e\n\u003cli\u003eNo sensor included\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe Dorman M12578 brake master cylinder is engineered with a 1-inch bore diameter to provide consistent hydraulic pressure for the braking system. Its aluminum construction offers corrosion resistance and lightweight durability, suitable for the brake hydraulics system in Mercury Villager and Nissan Quest vehicles. Featuring two outlets, including a rearward outlet sized M10 x 1.0, this master cylinder supports efficient brake fluid distribution. The secondary outlet thread diameter of 10 mm with a 1.0 thread pitch ensures compatibility with standard brake line fittings. Note that this part does not include mounting hardware or a reservoir, so these components must be sourced separately if needed.\u003c\/p\u003e\u003ch2\u003eCompatible Vehicles and Applications\u003c\/h2\u003e\u003cp\u003eThis brake master cylinder is compatible with the following vehicles:\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMercury Villager\u003c\/li\u003e\n\u003cli\u003eNissan Quest\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eIt is designed to replace the original equipment master cylinder in these models, restoring proper brake hydraulic function and pedal feel.\u003c\/p\u003e\u003ch2\u003eCommon Issues Addressed by This Master Cylinder\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBrake pedal sinking or sponginess due to internal leaks\u003c\/li\u003e\n\u003cli\u003eLoss of hydraulic pressure affecting braking performance\u003c\/li\u003e\n\u003cli\u003eBrake fluid leakage from a worn or damaged master cylinder\u003c\/li\u003e\n\u003cli\u003eUneven brake application between front and rear brakes\u003c\/li\u003e\n\u003cli\u003eFailure of the original master cylinder causing brake warning lights\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure the brake system is properly bled after installation to remove air\u003c\/li\u003e\n\u003cli\u003eVerify thread pitch and outlet sizes match existing brake lines (M10 x 1.0 rearward outlet)\u003c\/li\u003e\n\u003cli\u003eMounting hardware and reservoir must be reused or purchased separately\u003c\/li\u003e\n\u003cli\u003eInspect brake lines and fittings for wear or damage during replacement\u003c\/li\u003e\n\u003cli\u003eFollow vehicle-specific service manual instructions for safe installation\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDorman manufactures the M12578 brake master cylinder to meet or exceed OEM specifications for fit and function. The aluminum construction provides corrosion resistance for extended service life. While mounting hardware and sensors are not included, the master cylinder is tested for hydraulic integrity before shipment. Warranty coverage details should be confirmed through the original product documentation or Dorman's official resources.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":43789317439669,"sku":"BKKX-M12578","price":96.86,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DB_M12578_Fro.jpg?v=1774997450","url":"https:\/\/www.partcatalog.com\/products\/dorman-m12578-brake-master-cylinder","provider":"PartCatalog","version":"1.0","type":"link"}