Dorman M39583 Brake Master Cylinder

Reliable Brake Master Cylinder for GM Vehicles

The Dorman M39583 brake master cylinder is engineered to restore proper brake hydraulics in select Buick, Cadillac, Chevrolet, Oldsmobile, and Pontiac models. Designed with precision, this master cylinder ensures consistent brake fluid pressure for safe and responsive braking performance.

• Master cylinder bore diameter of 0.875 inches for accurate fluid displacement
• Durable aluminum construction for corrosion resistance and longevity
• Includes reservoir and sensor for complete brake system integration
• Four outlets with specific thread sizes for rearward and secondary connections
• Compatible with multiple GM models including Cavalier, Celebrity, Century, and Grand Am

Product Details and Specifications

The Dorman M39583 brake master cylinder features a robust aluminum body that resists corrosion and wear, ensuring reliable operation over time. Its 0.875-inch bore diameter is designed to provide precise hydraulic pressure to the brake system. This unit includes a reservoir and sensor, facilitating seamless integration with the vehicle’s brake fluid monitoring system. The master cylinder has four outlets, with rearward outlet sizes of M10 x 1.0 and M13 x 1.5, and secondary outlet thread diameters of M12 x 1.0 and M11 x 1.5, allowing compatibility with specific brake line fittings. This part is compatible with a range of GM vehicles such as the Buick Century, Cadillac Cimarron, Chevrolet Corsica, Oldsmobile Cutlass Ciera, and Pontiac Sunbird.

Common Applications and Problem Resolution

• Restores brake fluid pressure in vehicles experiencing soft or spongy brake pedal feel
• Replaces master cylinders with internal leaks or worn seals causing brake fluid loss
• Addresses brake warning light activation due to faulty sensor integration
• Resolves inconsistent braking performance related to master cylinder wear
• Suitable for maintenance or repair on GM models including the Chevrolet Cavalier and Pontiac Grand Am

Installation Notes and Tips

Installation of the Dorman M39583 brake master cylinder requires careful attention to brake line connections and proper bleeding of the brake system to remove air. Ensure compatibility with your vehicle’s brake line fittings by verifying outlet thread sizes. Since mounting hardware is not included, retain original fasteners or source appropriate replacements. Proper sensor connection is essential for brake fluid level monitoring functionality.

Quality Assurance and Warranty

Dorman manufactures this brake master cylinder to meet or exceed OEM standards for fit, form, and function. The aluminum construction and included sensor contribute to reliable brake system performance. While specific warranty details are not provided here, Dorman typically offers limited warranties on their brake hydraulics components to cover defects in materials and workmanship.