Dorman - First Stop Brake Master Cylinder P/N:M630111

Convert brake pedal effort into hydraulic pressure with the Dorman First Stop Brake Master Cylinder M630111. This Honda Civic master cylinder is a direct-fit replacement for the 2001-2005 Honda Civic (All) and the 2002-2004 Acura RSX (All). It is precision-engineered to replicate the original master cylinder's design, function and performance on the listed applications, and it is built from new, high-quality materials for a safe, durable replacement.

• Precise replacement: The aluminum cylinder housing is constructed to match the material of the original part for similar performance.
• Durable design: All rubber components use a high-quality EPDM compound that resists glycol-based brake fluid.
• 100% new: The unit is made entirely of new materials for quality and safety.
• Strict specifications: It is made to meet rigorous SAE International standards.

Specifications: 0.875 in bore diameter and two outlets. The rearward outlet size and the secondary outlet thread diameter are both M10 x 1.0, and the primary outlet thread pitch is 1 mm. The reservoir and a sensor are included. Mounting hardware is not included. Country of origin: China.

Signs a master cylinder may need replacing include a soft or sinking brake pedal, fluid seeping around the unit, or a low-fluid warning. Diagnose the brake system first, because these symptoms can have other causes. Follow the vehicle service information for bleeding the master cylinder and brake system.

Fitment: 2001-2005 Honda Civic (All) · 2002-2004 Acura RSX (All)

Interchange: 83-08049 · 100-1351 · M-54049 · 072-9438 · 072-9752 · 13-2943 · 11-2943 · 130.40049 · 131.40049 · 355-59031
8308049 · 1001351 · M54049 · 0729438 · 0729752 · 132943 · 112943 · 13040049 · 13140049 · 35559031 · M901200 · M901256 · 13933 · MC511540 · 46100S5DA51 · 46100S6MA01 · 46100S6MC01 · M55129 · NM55129 · MC390722 · F140217 · F141069 · MC140217