Dorman - First Stop Brake Master Cylinder P/N:M630439

Replace a leaking or worn Impala master cylinder with the Dorman First Stop Brake Master Cylinder M630439, a new unit for the 2006-2008 Chevrolet Impala and 2006-2007 Chevrolet Monte Carlo (all engines). It is a direct-fit replacement for these applications. The master cylinder converts pressure from the brake pedal into hydraulic pressure and sends brake fluid out to the brake lines.

Dorman designed this master cylinder to replicate the original unit's design, function and performance on the listed applications. It is built entirely from new, high-quality materials.

• Precise replacement: The aluminum cylinder housing is built to match the material of the original part and is intended to perform like it.
• Durable design: Every rubber component is made from a high-quality EPDM compound that resists glycol-based brake fluid.
• Strict specifications: Made to meet SAE International standards.
• Specifications: It has a 1-inch bore and two outlets. The secondary outlet has an M13 x 1.5 thread, and the primary outlet has a 1.5 mm thread pitch. The reservoir and sensor are included.

Signs a master cylinder may need replacing include a soft or sinking brake pedal, fluid seeping around the unit, or a brake fluid level that keeps dropping. Diagnose the cause before replacing, because other brake components can produce similar symptoms. Mounting hardware is not included. Consult the vehicle service information for the correct fasteners and the installation procedure. Country of origin: China.

Interchange: 174-1132 · 100-2360 · 13-3282 · 13-3723 · 10-3282 · 10-3723 · 130.62148 · 355-47101
1741132 · 1002360 · 133282 · 133723 · 103282 · 103723 · 13062148 · 35547101 · 10382902 · 10382903 · 19209185 · 19209186 · NM4087 · NM4112 · MC390984 · F142288 · F143383 · MC142288 · MC143383