{"product_id":"raybestos-mc391505-brake-master-cylinder","title":"Raybestos MC391505 Brake Master Cylinder","description":"\u003ch2\u003eReliable Brake Master Cylinder for BMW Models\u003c\/h2\u003e\u003cp\u003eThe Raybestos Element3; New Brake Master Cylinder MC391505 is engineered to restore precise brake hydraulics for various BMW vehicles. Designed with durable aluminum construction and specific mounting features, this master cylinder ensures consistent braking performance for your BMW 228i, 330i, 335i, and other compatible models.\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eConstructed from lightweight, corrosion-resistant aluminum\u003c\/li\u003e\n\u003cli\u003eTwo mounting holes with 0.346-inch diameter for secure installation\u003c\/li\u003e\n\u003cli\u003e1.000-inch bore size optimized for brake fluid pressure control\u003c\/li\u003e\n\u003cli\u003eTwo ports with M12x1 thread size for primary and secondary brake lines\u003c\/li\u003e\n\u003cli\u003eCompatible with a wide range of BMW models including 320i, 428i, and M240i\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eAbout the Raybestos Element3; New Product Line\u003c\/h2\u003e\u003cp\u003eThe Element3; New line from Raybestos focuses on delivering reliable brake hydraulics components with modern materials and precise engineering. This brake master cylinder MC391505 benefits from the Element3; New design philosophy, offering enhanced durability and fitment accuracy for BMW vehicles. The aluminum master cylinder material reduces weight while maintaining strength, contributing to overall vehicle performance and safety.\u003c\/p\u003e\u003ch2\u003eTechnical Details and Compatibility\u003c\/h2\u003e\u003cp\u003eThis brake master cylinder features a 1.000-inch bore size, which is critical for maintaining proper hydraulic pressure in the braking system. The two mounting holes, each with a diameter of 0.346 inches, ensure a secure and stable fit. Both the primary and secondary ports use M12x1 thread sizes, compatible with standard brake line fittings on BMW models such as the 228i xDrive, 330i xDrive, 335i GT xDrive, and 440i Gran Coupe xDrive. The part number MC391505 corresponds specifically to this configuration, making it a precise replacement for your vehicle’s brake hydraulics.\u003c\/p\u003e\u003ch2\u003eCommon Issues Addressed by This Brake Master Cylinder\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 around the master cylinder ports or mounting area\u003c\/li\u003e\n\u003cli\u003eInconsistent brake pressure affecting stopping performance\u003c\/li\u003e\n\u003cli\u003eFailure of the original master cylinder causing brake warning lights\u003c\/li\u003e\n\u003cli\u003eCorrosion or damage to the master cylinder body impacting brake system integrity\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eInstallation Notes and Tips\u003c\/h2\u003e\u003cp\u003eWhen installing the Raybestos MC391505 brake master cylinder, ensure the mounting holes align precisely with the vehicle’s brake booster or firewall. Use the correct torque specifications for mounting bolts to avoid leaks or misalignment. Bleed the brake system thoroughly after installation to remove air and restore proper hydraulic pressure. Verify that the M12x1 threaded ports are compatible with your brake lines and use appropriate sealing methods to prevent fluid leaks.\u003c\/p\u003e\u003ch2\u003eQuality Assurance and Warranty\u003c\/h2\u003e\u003cp\u003eRaybestos manufactures the MC391505 brake master cylinder to meet or exceed OEM standards for fit, form, and function. The aluminum construction provides corrosion resistance and long service life. This part is backed by Raybestos’ quality control processes, ensuring reliable performance in BMW brake systems. Warranty details are provided by Raybestos and typically cover defects in material and workmanship under normal use conditions.\u003c\/p\u003e","brand":"Raybestos","offers":[{"title":"Default Title","offer_id":44428059607221,"sku":"BDBL-MC391505","price":124.14,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0628\/1442\/1173\/files\/RS_MC391505_Fro_ad751e27-4ffe-466e-8d01-82d49ff78d7f.jpg?v=1775018995","url":"https:\/\/www.partcatalog.com\/products\/raybestos-mc391505-brake-master-cylinder","provider":"PartCatalog","version":"1.0","type":"link"}