{"product_id":"dorman-m630639-brake-master-cylinder","title":"Dorman M630639 Brake Master Cylinder","description":"\u003ch2\u003eReliable Brake Master Cylinder for Chevrolet Aveo and Pontiac G3\u003c\/h2\u003e\u003cp\u003eThe Dorman M630639 brake master cylinder is engineered to restore proper brake hydraulics in Chevrolet Aveo, Aveo5, Pontiac G3, and G3 Wave models. Designed with precision, this aluminum master cylinder includes a reservoir and sensor to ensure consistent brake performance.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMaster cylinder bore diameter: 0.875 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 for fluid storage and sensor for monitoring brake system status\u003c\/li\u003e\n\u003cli\u003eTwo outlets with rearward outlet size M10 x 1.0 and secondary outlet thread diameter 10 mm\u003c\/li\u003e\n\u003cli\u003eThread pitch of 1.0 for secure fitting\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eDetailed Product Description\u003c\/h2\u003e\u003cp\u003eThe Dorman M630639 brake master cylinder is a direct replacement part designed specifically for Chevrolet Aveo, Aveo5, Pontiac G3, and G3 Wave vehicles. Its aluminum construction provides strength and resistance to corrosion, extending the service life of the brake system. The included reservoir allows for proper brake fluid containment, while the integrated sensor helps maintain system integrity by monitoring fluid levels or pressure. With a bore diameter of 0.875 inches, this master cylinder delivers precise hydraulic pressure to the brake lines through its two outlets, featuring a rearward outlet size of M10 x 1.0 and a secondary outlet thread diameter of 10 mm. The 1.0 thread pitch ensures compatibility with OEM brake line fittings.\u003c\/p\u003e\u003ch2\u003eCommon Brake Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eBrake pedal sinking or sponginess due to master cylinder wear\u003c\/li\u003e\n\u003cli\u003eBrake fluid leaks from a damaged or corroded master cylinder\u003c\/li\u003e\n\u003cli\u003eInconsistent brake pressure affecting stopping performance\u003c\/li\u003e\n\u003cli\u003eFaulty brake fluid level sensor triggering warning lights\u003c\/li\u003e\n\u003cli\u003eReplacement needed after brake system overhaul or failure\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eInstallation of the Dorman M630639 brake master cylinder requires proper brake fluid handling and bleeding procedures to avoid air in the brake lines. Ensure the mounting surface is clean and free of debris before installation. Use compatible brake lines with M10 x 1.0 thread fittings to secure the outlets. Since mounting hardware is not included, retain original fasteners or acquire appropriate replacements. Verify sensor connections are properly seated to maintain brake system monitoring.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDorman manufactures the M630639 brake master cylinder to meet or exceed OEM specifications for Chevrolet Aveo and Pontiac G3 models. The aluminum construction and integrated sensor contribute to reliable brake system operation. While specific warranty details are not provided, Dorman products typically come with a limited warranty covering defects in materials and workmanship.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":52089076154549,"sku":"BKKX-M630639","price":114.77,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DB_M630639_Generic.jpg?v=1775148252","url":"https:\/\/www.partcatalog.com\/products\/dorman-m630639-brake-master-cylinder","provider":"PartCatalog","version":"1.0","type":"link"}