If a worn or leaking master cylinder is the problem, the Dorman First Stop Brake Master Cylinder M630866 is a new replacement that converts the force on your brake pedal into hydraulic pressure for the brake system. It fits many vehicles, among them the 2006-2010 Volkswagen Passat, 2009-2017 Volkswagen Tiguan and 2015-2019 Audi Q3. See the Buyer's Guide tab for the full list. Dorman designs this master cylinder to match the design, function and performance of the original unit on the listed applications, and builds it from new, high-quality materials for a safe, durable replacement.
- Precise replacement: the aluminum cylinder housing is built to match the original part's housing material and deliver similar performance.
- Durable design: every rubber component uses a high-quality EPDM compound that resists glycol-based brake fluid.
- 100% new: made entirely from new materials for quality and safety.
- Strict specifications: built to meet rigorous SAE International standards.
Specifications: 0.938 in bore diameter, two outlets, M12 x 1.0 secondary and rearward outlet threads, and a 1 mm primary outlet thread pitch. The package contains the master cylinder only. The reservoir, sensor and mounting hardware are not included, so transfer or replace them as the vehicle service procedure directs. Consult the service information for the correct fasteners and whether they may be reused, and bleed the brake system after installation. Country of origin: China.
Interchange: 100-4083 · 13-3500 · 11-3500 · 130.33131 · 355-74009
1004083 · 133500 · 113500 · 13033131 · 35574009 · NM55534 · MC391414 · 3C1614019C · 3C1614019E · R135275
This part cross-references / interchanges with the following part numbers:
100-4083, 13-3500, 11-3500, 130.33131, 355-74009, NM55534, MC391414, 3C1614019C, 3C1614019E, R135275
