Dorman M39147 Brake Master Cylinder

Reliable Brake Master Cylinder for Volkswagen Vehicles

The Dorman M39147 brake master cylinder is engineered to provide consistent hydraulic pressure for your Volkswagen Atlantic, Jetta, and Rabbit Convertible models. Designed with durable cast iron construction, this master cylinder ensures dependable braking performance under various driving conditions.

• Master cylinder bore diameter: 0.813 inches for precise hydraulic control
• Constructed from cast iron for strength and durability
• Includes six outlets with a rearward outlet size of M10 x 1.0 and a thread pitch of 1.0
• Secondary outlet thread diameter measures 10 mm
• Package contains the master cylinder only; reservoir and mounting hardware are not included

Detailed Product Description

The Dorman M39147 brake master cylinder is designed specifically for select Volkswagen models including the Atlantic, Jetta, and Rabbit Convertible. Its cast iron material provides a robust and corrosion-resistant body, essential for maintaining brake system integrity. The 0.813-inch bore diameter allows for accurate hydraulic pressure generation, which is critical for effective brake operation. Featuring six outlets, including a rearward outlet sized M10 x 1.0 with a 1.0 thread pitch, this master cylinder supports proper brake line connections and fluid distribution. Note that this unit does not include a reservoir or mounting hardware, so those components must be sourced separately.

Common Applications and Problem Resolution

• Restores proper hydraulic pressure in brake systems experiencing spongy or unresponsive brakes
• Replaces worn or leaking master cylinders causing brake fluid loss
• Addresses brake pedal sinking or failure to maintain pressure
• Eliminates brake drag caused by internal cylinder seal failure
• Improves overall brake system reliability for Volkswagen Atlantic, Jetta, and Rabbit Convertible

Installation Notes and Tips

• Ensure compatibility with Volkswagen Atlantic, Jetta, and Rabbit Convertible models before installation
• Bleed the brake system thoroughly after installation to remove air and ensure proper hydraulic function
• Use appropriate brake fluid as specified by the vehicle manufacturer
• Verify thread sizes and outlet connections match existing brake lines for a secure fit
• Mounting hardware and reservoir must be installed separately as they are not included

Quality Assurance and Warranty

Dorman manufactures the M39147 brake master cylinder to meet or exceed OEM specifications for fit, form, and function. The cast iron construction is tested for durability and corrosion resistance to provide long service life. While specific warranty details are not provided here, Dorman products typically come with a limited warranty covering defects in materials and workmanship. Consult product documentation or the manufacturer for exact warranty terms.