Dorman M390271 Brake Master Cylinder

Reliable Brake Master Cylinder for Volkswagen Vehicles

The Dorman M390271 brake master cylinder is engineered to provide consistent hydraulic pressure for your Volkswagen Cabrio, Corrado, Derby, EuroVan, Golf, Jetta, Passat, and Van models. Designed with precision, this aluminum master cylinder ensures durability and efficient brake system performance.

• Master cylinder bore diameter: 0.875 inches for optimal hydraulic control
• Constructed from durable aluminum material for corrosion resistance
• Includes four outlets with a secondary outlet thread diameter of 10 mm
• Rearward outlet size: M10 x 1.0 with a thread pitch of 1.0
• Does not include reservoir or sensor, sold as master cylinder only

Technical Details and Specifications

The Dorman M390271 brake master cylinder features a 0.875-inch bore diameter, which is critical for maintaining proper brake fluid pressure and pedal feel. Its aluminum construction offers a lightweight yet robust solution resistant to rust and wear. The unit includes four outlets, accommodating complex brake hydraulic systems found in various Volkswagen models. The secondary outlet thread diameter measures 10 mm, and the rearward outlet is sized M10 x 1.0 with a 1.0 thread pitch, ensuring compatibility with factory brake lines. This master cylinder is supplied without a reservoir or sensor, making it suitable for applications where these components are reused or replaced separately.

Compatible Volkswagen Models and Applications

• Volkswagen Cabrio brake hydraulic replacement
• Brake master cylinder for Volkswagen Corrado and Derby
• EuroVan brake system maintenance and repair
• Golf, Jetta, Passat, and Van brake master cylinder upgrade

Installation Notes and Tips

When installing the Dorman M390271 brake master cylinder, ensure the brake fluid reservoir and sensors are compatible and properly connected, as these are not included. Bleed the brake system thoroughly after installation to remove air and restore optimal brake performance. Verify thread sizes and outlet fittings match your vehicle’s brake lines to avoid leaks or improper fitment.

Quality Assurance and Warranty Information

Dorman manufactures this brake master cylinder to meet or exceed OEM specifications for Volkswagen vehicles. The aluminum construction provides long-lasting durability under normal operating conditions. While mounting hardware is not included, the part number M390271 is backed by Dorman’s quality standards. Please consult Dorman’s warranty policy for specific coverage details.