Centric 130.62121 Brake Master Cylinder

Centric Premium Brake Master Cylinder

The Centric 130.62121 brake master cylinder is built for direct replacement on select Buick Rendezvous and Pontiac Aztek applications. It matches original equipment quality, configuration, and fitment, with an aluminum master cylinder body, a single plastic reservoir, and a removable reservoir style for service-friendly packaging.

Centric Premium Brake Master Cylinders are part of the Centric Premium Brake Master Cylinders line, which focuses on OE-style brake hydraulic replacement parts for everyday repair work. This unit includes a reservoir and cap, uses a 1.000-inch bore, and features two 1/2"-20 inverted flare outlet ports for the primary and secondary circuits.

• Part number: 130.62121
• Fits 2002-2007 Buick Rendezvous
• Fits 2001-2005 Pontiac Aztek
• Aluminum master cylinder construction
• Single plastic reservoir with cap included
• 1.000-inch bore diameter for OE-style hydraulic performance
• Two-port design with 1/2"-20 inverted flare outlets
• 2 mounting holes; straight bore type
• Brake booster, push rod, mounting bracket, and mounting hardware not included

Detailed Product Overview

Centric 130.62121 is a brake master cylinder replacement for drivers servicing a Buick Rendezvous or Pontiac Aztek with the correct hydraulic setup. It is engineered to match original equipment form and fit, helping restore consistent brake pedal response when the master cylinder is worn, leaking, or no longer holding pressure. The removable reservoir design, aluminum body, and OE-style port configuration support a straightforward replacement on the listed vehicles.

This part cross-references Dorman First Stop M630041 and Raybestos Brakes MC390714 for the same application.

Common Brake System Issues

• Low or sinking brake pedal caused by internal master cylinder bypass
• External brake fluid leaks at the master cylinder body or outlet ports
• Uneven or delayed hydraulic pressure delivery to the brake system
• Brake warning light concerns related to master cylinder fluid level or hydraulic loss
• Loss of braking consistency on 2002-2007 Buick Rendezvous and 2001-2005 Pontiac Aztek models

Installation Notes and Tips

Before installation, confirm the bore size, outlet thread size, and reservoir layout match the original unit on the vehicle. Bench bleeding the master cylinder before final installation helps remove trapped air from the hydraulic circuit and supports proper pedal feel after service. Verify all brake line connections are clean and properly seated, and inspect the brake booster and fluid condition during replacement.

Quality Assurance

Centric brake hydraulic components are built to OE-style specifications for quality, configuration, and fitment. The 130.62121 master cylinder is supplied as a direct replacement hydraulic component for the listed Buick Rendezvous and Pontiac Aztek applications.