{"product_id":"dorman-m639012-brake-master-cylinder","title":"Dorman M639012 Brake Master Cylinder","description":"\u003ch2\u003eOverview of Dorman Brake Master Cylinder M639012\u003c\/h2\u003e\u003cp\u003eThe Dorman Brake Master Cylinder M639012 is designed specifically for Chevrolet Astra models, providing reliable brake hydraulics performance. Crafted from durable cast iron, this master cylinder ensures consistent braking pressure and long-lasting service.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMaster cylinder bore diameter: 0.875 inches\u003c\/li\u003e\n\u003cli\u003eMaterial: Cast iron construction for durability\u003c\/li\u003e\n\u003cli\u003eNumber of outlets: 4 for efficient brake fluid distribution\u003c\/li\u003e\n\u003cli\u003eRearward outlet size: M10 x 1.0 thread\u003c\/li\u003e\n\u003cli\u003eSecondary outlet thread diameter: M12 x 1.0 with 1.0 thread pitch\u003c\/li\u003e\n\u003cli\u003ePackage includes the master cylinder only; reservoir and mounting hardware not included\u003c\/li\u003e\n\u003cli\u003eSensor not included\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThis Dorman brake master cylinder (part number M639012) is engineered to meet the specific hydraulic requirements of Chevrolet Astra vehicles. The 0.875-inch bore diameter allows for precise brake fluid pressure control, essential for safe and responsive braking. Constructed from cast iron, the master cylinder offers strength and resistance to wear under demanding conditions. It features four outlets, including a rearward outlet sized M10 x 1.0 and a secondary outlet with M12 x 1.0 thread diameter, ensuring compatibility with the vehicle's brake lines and fittings. Note that this unit does not include a reservoir or sensor, and mounting hardware is not provided, so these components must be sourced separately if needed.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Problem Resolution\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestores proper brake fluid pressure in Chevrolet Astra 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 damaged or corroded master cylinders\u003c\/li\u003e\n\u003cli\u003eImproves brake system responsiveness and safety\u003c\/li\u003e\n\u003cli\u003eSuitable for vehicles experiencing inconsistent brake pedal feel or pressure loss\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure compatibility with Chevrolet Astra models before installation\u003c\/li\u003e\n\u003cli\u003eBleed the brake system thoroughly after installation to remove air\u003c\/li\u003e\n\u003cli\u003eVerify thread sizes (M10 x 1.0 and M12 x 1.0) match brake line fittings\u003c\/li\u003e\n\u003cli\u003eMounting hardware and reservoir must be installed separately as they are not included\u003c\/li\u003e\n\u003cli\u003eInspect brake lines and sensors for wear or damage during replacement\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDorman manufactures this brake master cylinder to meet or exceed OEM specifications for Chevrolet Astra vehicles. The cast iron construction provides durability and resistance to corrosion. While specific warranty details are not provided here, Dorman typically offers limited warranties on their brake hydraulic components. It is recommended to consult the product packaging or Dorman’s official resources for exact warranty terms.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":43792441442485,"sku":"BKKX-M639012","price":115.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DB_M639012_Fro.jpg?v=1774997806","url":"https:\/\/www.partcatalog.com\/products\/dorman-m639012-brake-master-cylinder","provider":"PartCatalog","version":"1.0","type":"link"}