Dorman M630171 Brake Master Cylinder

Reliable Brake Master Cylinder for Mercedes-Benz Models

The Dorman M630171 brake master cylinder is engineered to provide consistent hydraulic pressure for your Mercedes-Benz E320, E420, S320, S350, SL320, and SL500. Designed with precision, this aluminum master cylinder ensures durability and efficient brake system performance.

• Master cylinder bore diameter: 25 mm for optimal hydraulic control
• Constructed from lightweight, corrosion-resistant aluminum
• Includes two outlets with rearward outlet size M10 x 1.0 and secondary outlet thread diameter M12 x 1.0
• Does not include mounting hardware, reservoir, or sensor
• Package contains the master cylinder only

Technical Details and Specifications

The Dorman M630171 brake master cylinder features a 25 mm bore diameter, which is critical for maintaining proper brake fluid pressure and pedal feel. Its aluminum construction offers a balance of strength and weight savings, helping to reduce overall vehicle weight without compromising durability. The unit includes two outlets: a rearward outlet sized M10 x 1.0 and a secondary outlet with an M12 x 1.0 thread pitch, ensuring compatibility with the brake lines on specified Mercedes-Benz models. Note that this master cylinder does not come with mounting hardware, reservoir, or sensor, so these components must be sourced separately if needed.

Compatible Mercedes-Benz Models

This brake master cylinder is compatible with the following Mercedes-Benz vehicles: E320, E420, S320, S350, SL320, and SL500. It is designed to meet the specific hydraulic requirements of these models, making it a suitable replacement part for brake system repairs or upgrades.

Common Brake System Issues Addressed

• Brake pedal sinking or sponginess due to master cylinder wear
• Brake fluid leaks from a damaged or corroded master cylinder
• Reduced braking efficiency caused by internal seal failure
• Inconsistent brake pressure affecting vehicle safety
• Brake warning light activation related to master cylinder faults

Installation Notes and Tips

When installing the Dorman M630171 brake master cylinder, ensure the brake system is properly bled to remove any air pockets. Since mounting hardware and reservoir are not included, verify compatibility with existing components or acquire replacements as necessary. Use the correct thread pitch (1.0) for outlet fittings to avoid leaks. It is recommended to inspect brake lines and sensors during installation to maintain overall system integrity.

Quality Assurance and Warranty

Dorman manufactures this brake master cylinder to meet or exceed OEM standards for fit, form, and function. While specific warranty details may vary, Dorman typically offers a limited warranty covering defects in materials and workmanship. Refer to the product documentation for exact warranty terms related to part number M630171.