Dorman M630331 Brake Master Cylinder

Reliable Brake Master Cylinder for Pontiac Vibe

The Dorman M630331 brake master cylinder is engineered to restore proper brake hydraulics in your Pontiac Vibe. Designed with precision, this aluminum master cylinder includes a reservoir and sensor to ensure consistent brake fluid management and system performance.

• Master cylinder bore diameter: 20.68 mm for accurate hydraulic pressure
• Constructed from durable aluminum material for corrosion resistance
• Includes reservoir for brake fluid storage
• Equipped with sensor for brake system monitoring
• Two outlets with rearward outlet size M10 x 1.0 and thread pitch 1.0

Product Details and Specifications

The Dorman M630331 brake master cylinder is specifically designed for the Pontiac Vibe, providing a direct replacement for the original component. Its aluminum construction offers strength and longevity while resisting corrosion from brake fluid exposure. The 20.68 mm bore diameter ensures proper hydraulic pressure is maintained for effective braking. This master cylinder comes with an integrated reservoir to hold brake fluid and a sensor to monitor fluid levels or pressure, supporting the vehicle’s brake system diagnostics. The unit features two outlets, including a rearward outlet with M10 x 1.0 thread size and a 1.0 thread pitch, compatible with the brake lines on the Pontiac Vibe.

Common Applications and Problem Resolution

• Restores brake pressure loss due to worn or damaged master cylinder
• Replaces leaking or cracked brake fluid reservoir
• Resolves brake warning light issues related to sensor failure
• Addresses inconsistent brake pedal feel or sponginess
• Fixes brake fluid contamination or internal seal failure

Installation Notes and Tips

When installing the Dorman M630331 brake master cylinder on a Pontiac Vibe, ensure the brake system is properly bled to remove air and maintain hydraulic integrity. Verify compatibility with your vehicle’s brake line fittings, especially the M10 x 1.0 rearward outlet thread. Since mounting hardware is not included, retain original fasteners or source appropriate replacements. Handle the aluminum master cylinder carefully to avoid damage during installation.

Quality Assurance and Warranty

Dorman manufactures this brake master cylinder to meet or exceed OEM specifications for the Pontiac Vibe. The part is tested for durability and performance under typical operating conditions. While specific warranty details are not provided here, Dorman products generally come with a limited warranty against defects in materials and workmanship.