Dorman M630662 Brake Master Cylinder

Brake Master Cylinder for Nissan Versa

Dorman M630662 is a brake master cylinder built for specific Nissan Versa applications, including 2010-2011 models with drum brake wheel cylinders that require a 7/8 in. bore size. It is engineered to match the original unit’s design, function, and performance, using new aluminum construction for a durable replacement.

Key Features

• Direct replacement brake master cylinder for select Nissan Versa vehicles
• 0.875 in. bore diameter for the specified drum brake application
• Aluminum master cylinder body for corrosion-resistant strength
• Two outlet ports with M10 x 1.0 rearward outlet thread
• New, high-quality materials used throughout the assembly
• Part number M630662 for easy identification and ordering

Detailed Description

This Dorman brake master cylinder is designed for 2010-2011 Nissan Versa models and matches the original hydraulic layout for the listed application. The 0.875-inch bore size, dual outlets, and M10 x 1.0 thread pitch support proper brake system operation where the vehicle calls for a 7/8-inch master cylinder. Dorman M630662 is a practical OE-style replacement for Nissan Versa brake hydraulics service, especially when restoring pedal feel and hydraulic pressure consistency.

This part cross-references Raybestos Brakes MC391304 for the same application.

What It Helps Fix

• Soft or inconsistent brake pedal response
• Internal master cylinder leakage
• Loss of hydraulic pressure in the brake system
• Brake fluid bypass past worn internal seals
• Replacement needs on 2010-2011 Nissan Versa drum brake setups

Installation Notes and Tips

Reservoir, sensor, and mounting hardware are not included. Verify bore diameter, outlet thread size, and vehicle brake configuration before installation. Bench bleeding the master cylinder before final installation helps reduce trapped air and supports proper brake pedal performance after service.

Quality Assurance

Dorman manufactures this master cylinder as a new replacement part built to match the original design and function for the listed Nissan Versa applications. The aluminum construction and application-specific engineering support dependable brake system service.