Dorman M39703 Brake Master Cylinder

Reliable Brake Master Cylinder for Mercedes-Benz Models

The Dorman M39703 brake master cylinder is engineered to restore proper brake hydraulics in select Mercedes-Benz vehicles. Designed with precision, this aluminum master cylinder ensures consistent brake fluid pressure for safe and effective braking performance.

• Constructed from durable aluminum for corrosion resistance
• Dual bore diameters: 0.75 inch and 0.938 inch for precise hydraulic control
• Includes three outlets with a rearward outlet size of M10 x 1.0 and 1.0 thread pitch
• Does not include mounting hardware or reservoir, allowing compatibility with existing components
• Compatible with multiple Mercedes-Benz models including 260E, 300CE, 300D, 300E, 300TD, 300TE, C36 AMG, C220, C280, and E320

Detailed Product Description

The Dorman M39703 brake master cylinder is designed to meet the specific hydraulic requirements of various Mercedes-Benz vehicles. Featuring an aluminum construction, this master cylinder offers durability and resistance to corrosion, which is critical for maintaining brake system integrity over time. The dual bore diameters of 0.75 inch and 0.938 inch provide balanced hydraulic pressure to the brake system, ensuring responsive and reliable braking. With three outlets, including a rearward outlet sized M10 x 1.0 and a thread pitch of 1.0, this master cylinder integrates seamlessly with the brake lines of compatible Mercedes-Benz models. Note that this unit does not include a reservoir or mounting hardware, making it suitable for installations where these components are already in place or replaced separately.

Common Applications and Issues Addressed

• Restores brake fluid pressure in Mercedes-Benz 260E, 300CE, 300D, 300E, 300TD, 300TE, C36 AMG, C220, C280, and E320 models
• Resolves spongy or unresponsive brake pedal feel caused by master cylinder wear
• Addresses internal leaks that reduce braking efficiency
• Eliminates brake fluid contamination issues related to master cylinder failure
• Prevents brake system failure due to worn or damaged master cylinder components

Installation Notes and Tips

• Ensure compatibility with your specific Mercedes-Benz model before installation
• Bleed the brake system thoroughly after installation to remove air and ensure proper hydraulic pressure
• Use appropriate brake fluid as specified by the vehicle manufacturer
• Inspect and replace mounting hardware and reservoir if necessary, as these are not included
• Follow all safety precautions when working with brake hydraulics

Quality Assurance and Warranty

Dorman manufactures the M39703 brake master cylinder to meet or exceed OEM standards for fit, form, and function. The aluminum construction provides long-lasting durability under normal operating conditions. While specific warranty details should be confirmed at the time of purchase, Dorman typically offers limited warranties covering defects in material and workmanship to ensure customer confidence in product reliability.