Turn every press of the pedal into hydraulic braking pressure with the Dorman First Stop Brake Master Cylinder M630041. It is a direct-fit replacement for the 2001-2005 Pontiac Aztek (Engine: All) and the 2002-2007 Buick Rendezvous (Engine: All), with one master cylinder used per vehicle. It is precision-engineered to duplicate the original master cylinder's design, function and performance, and it is built from new, high-quality materials for a durable replacement.
- Precise replacement: The aluminum cylinder housing is constructed to match the casting 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: Made entirely of new materials for quality and safety.
- Strict specifications: Made to meet rigorous SAE International standards.
Specifications: aluminum master cylinder with a 1 in bore diameter and two outlets. The rearward outlet size is 1/2-20, and the secondary outlet thread diameter is 1/2-20. The reservoir and sensor are included. Mounting hardware is not included, so consult the vehicle service information for the correct fasteners and whether the originals may be reused. Country of origin: China.
Signs a master cylinder may need replacing include a soft or sinking brake pedal, brake fluid leaking at the master cylinder, or an illuminated brake warning light. These symptoms can have other causes, so diagnose the brake system before replacing parts.
Interchange: 174-789 · 100-2335 · 13-3104 · 10-3104 · 130.62121 · 355-45018
18044392 · 18045967 · 18060786 · M4021 · NM4021 · MC390714 · F142620 · MC142620 · 174789 · 1002335 · 133104 · 103104 · 13062121 · 35545018
This part cross-references / interchanges with the following part numbers:
174-789, 100-2335, 13-3104, 10-3104, 130.62121, 355-45018, 18044392, 18045967, 18060786, M4021, NM4021, MC390714, F142620, MC142620
