Dorman M630069 Brake Master Cylinder

Overview of Dorman Brake Master Cylinder M630069

The Dorman Brake Master Cylinder M630069 is designed specifically for select BMW models including the 525i, 528i, 530i, 540i, and M5. Engineered with an aluminum body and a 21mm bore diameter, this master cylinder delivers reliable brake hydraulics performance for your vehicle.

• Compatible with BMW 525i, 528i, 530i, 540i, and M5 models
• Master cylinder bore diameter: 21mm
• Constructed from durable aluminum material
• Includes two outlets with rearward outlet size M10 x 1.0 and secondary outlet thread diameter M12 x 1.0
• Package contains the master cylinder only; mounting hardware and reservoir are not included

Detailed Product Description

The Dorman M630069 brake master cylinder is a precision-engineered component designed to restore proper brake hydraulic function in compatible BMW vehicles. Its aluminum construction offers corrosion resistance and strength, ensuring long-term durability. The 21mm bore diameter is optimized for the brake system requirements of the 525i, 528i, 530i, 540i, and M5 models. Featuring two outlets, the master cylinder supports efficient brake fluid distribution with a rearward outlet size of M10 x 1.0 and a secondary outlet thread diameter of M12 x 1.0, both with a thread pitch of 1.0. This part does not include a reservoir or sensor, and mounting hardware is not provided, so these components must be sourced separately if needed.

Common Applications and Issues Addressed

• Restores brake hydraulic pressure in BMW 525i, 528i, 530i, 540i, and M5 models
• Replaces worn or leaking master cylinders causing brake fluid loss
• Eliminates spongy or unresponsive brake pedal feel
• Addresses internal seal failures leading to brake system inefficiency
• Resolves brake fluid contamination issues affecting master cylinder performance

Installation Notes and Tips

• Ensure compatibility with your specific BMW model and year before installation
• Bleed the brake system thoroughly after installation to remove air pockets
• Mounting hardware and reservoir are not included; reuse existing parts or acquire replacements as needed
• Inspect brake lines and fittings for wear or damage during installation
• Follow manufacturer torque specifications for outlet fittings (M10 x 1.0 and M12 x 1.0 threads)

Quality Assurance and Warranty

Dorman manufactures the M630069 brake master cylinder to meet or exceed OEM standards for fit, form, and function. The aluminum construction provides corrosion resistance and durability under normal operating conditions. While specific warranty details are not provided here, Dorman typically offers limited warranties on their brake hydraulic components. Consult product documentation or contact the supplier for exact warranty terms.