Turn every press of the brake pedal into hydraulic pressure with the Dorman First Stop Brake Master Cylinder M630421. It is a direct-fit Ford Explorer master cylinder replacement for 2003-2005 models, and it also fits the 2003-2005 Mercury Mountaineer and 2003-2004 Lincoln Aviator with all engines. Dorman engineered this new unit to match the design, function and performance of the original master cylinder on these applications.
- Precise replacement: The aluminum cylinder housing is built 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: It is made entirely from new, high-quality materials.
- Strict specifications: It is made to meet rigorous SAE International standards.
Specifications: The unit has a 27 mm bore and three outlets. The rearward and secondary outlets use M12 x 1.0 threads, and the primary outlet thread pitch is 1 mm. 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: Taiwan.
Signs that an Explorer master cylinder may need replacing include a soft or sinking brake pedal, fluid seeping around the unit, or a fluid level that keeps dropping. Diagnose the cause before you replace any parts, and bleed the brake system after installation as the service procedure directs.
Interchange: 100-2542 · 13-4138 · 10-4137 · 10-4138 · 130.65088 · 355-54204 · BRMC-3
1002542 · 134138 · 104137 · 104138 · 13065088 · 35554204 · BRMC3 · 13882 · 2L2Z2140AB · 4L2Z2140BA · M4103 · NM4103 · MC391045 · MC143413
This part cross-references / interchanges with the following part numbers:
100-2542, 13882, 13-4138, 10-4137, 10-4138, 130.65088, 355-54204, 2L2Z2140AB, 4L2Z2140BA, M4103, NM4103, BRMC-3, MC391045, MC143413
