{"product_id":"dorman-m630040-brake-master-cylinder","title":"Dorman M630040 Brake Master Cylinder","description":"\u003ch2\u003eReliable Brake Master Cylinder for Buick, Cadillac, Oldsmobile, Pontiac\u003c\/h2\u003e\u003cp\u003eThe Dorman M630040 Brake Master Cylinder is designed to restore proper brake hydraulics in select Buick, Cadillac, Oldsmobile, and Pontiac models. Engineered with an aluminum body and integrated reservoir, this master cylinder ensures consistent brake fluid delivery and pressure for safe stopping performance.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eMaster cylinder bore diameter: 1 inch for precise hydraulic control\u003c\/li\u003e\n\u003cli\u003eConstructed from durable aluminum material for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eIncludes reservoir for brake fluid storage and management\u003c\/li\u003e\n\u003cli\u003eEquipped with sensor to monitor brake system status\u003c\/li\u003e\n\u003cli\u003eTwo outlets with rearward outlet size M14 x 1.5 and 14mm secondary outlet thread diameter\u003c\/li\u003e\n\u003cli\u003eThread pitch of 1.5 for 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 M630040 brake master cylinder is specifically engineered for compatibility with Buick Aurora, Cadillac DeVille, Oldsmobile LeSabre, and Pontiac Bonneville models. Its 1-inch bore diameter provides accurate hydraulic pressure control, essential for effective brake system operation. The aluminum construction offers enhanced durability and resistance to corrosion, extending the service life of the component. This master cylinder includes an integrated reservoir to maintain proper brake fluid levels and a sensor to provide feedback on brake system conditions. Featuring two outlets with a rearward outlet size of M14 x 1.5 and a secondary outlet thread diameter of 14mm, it ensures proper fluid distribution to the brake lines. The thread pitch of 1.5 guarantees a secure and leak-free connection during installation.\u003c\/p\u003e\u003ch2\u003eCommon Applications and Issues Addressed\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eRestores brake hydraulic pressure in Buick Aurora, Cadillac DeVille, Oldsmobile LeSabre, and Pontiac Bonneville\u003c\/li\u003e\n\u003cli\u003eReplaces worn or leaking master cylinders causing brake fluid loss\u003c\/li\u003e\n\u003cli\u003eSolves spongy or unresponsive brake pedal feel due to internal seal failure\u003c\/li\u003e\n\u003cli\u003eAddresses brake warning light activation related to sensor faults\u003c\/li\u003e\n\u003cli\u003ePrevents brake system failure caused by reservoir damage or contamination\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnsure brake fluid reservoir is properly filled before installation\u003c\/li\u003e\n\u003cli\u003eBleed the brake system thoroughly after installation to remove air\u003c\/li\u003e\n\u003cli\u003eVerify thread pitch and outlet sizes match vehicle specifications for proper fit\u003c\/li\u003e\n\u003cli\u003eUse appropriate tools to avoid damaging aluminum surfaces during installation\u003c\/li\u003e\n\u003cli\u003eMounting hardware is not included; reuse existing hardware or source separately\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eDorman manufactures the M630040 brake master cylinder to meet or exceed OEM specifications for fit, form, and function. The aluminum construction and integrated sensor contribute to reliable brake system performance. While mounting hardware is not included, the product undergoes quality checks to ensure durability and compatibility with specified Buick, Cadillac, Oldsmobile, and Pontiac models. Warranty details should be confirmed with the distributor or manufacturer.\u003c\/p\u003e","brand":"Dorman","offers":[{"title":"Default Title","offer_id":43792214196405,"sku":"BKKX-M630040","price":108.53,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/DB_M630040_Fro.jpg?v=1774997605","url":"https:\/\/www.partcatalog.com\/products\/dorman-m630040-brake-master-cylinder","provider":"PartCatalog","version":"1.0","type":"link"}