Dorman 603-645 Brake Master Cylinder Reservoir

Overview of the Dorman Brake Master Cylinder Reservoir

The Dorman 603-645 Brake Master Cylinder Reservoir is designed to provide reliable fluid containment for your vehicle's brake system. Made from durable white plastic, this reservoir is compatible with select Audi and Volkswagen models, ensuring proper fit and function.

• Constructed from durable white plastic material
• Includes a cap for secure fluid sealing
• Non-pressurized design suitable for brake hydraulics
• Compatible with Audi A4, A4 Quattro, A6, A6 Quattro, Allroad Quattro, RS4, S4, and Volkswagen Passat
• Part number 603-645 for precise identification

Product Details and Specifications

This brake master cylinder reservoir by Dorman is engineered to meet the specifications required for proper brake fluid storage and delivery. The white plastic construction resists corrosion and fluid contamination, while the included cap helps maintain system integrity. The reservoir does not include mounting hardware and features zero mount holes, designed to fit directly onto the master cylinder assembly. This part is non-pressurized, aligning with standard brake hydraulic system requirements.

Compatible Vehicles and Applications

The Dorman 603-645 reservoir is compatible with a range of Audi and Volkswagen vehicles, including the Audi A4, A4 Quattro, A6, A6 Quattro, Allroad Quattro, RS4, S4, and the Volkswagen Passat. This ensures a proper fit for brake system maintenance or repair on these specific models.

Common Issues Addressed by This Reservoir

• Brake fluid leaks due to cracked or damaged reservoirs
• Contamination of brake fluid from deteriorated reservoir materials
• Inadequate fluid containment causing brake system performance issues
• Replacement of worn or faulty brake master cylinder reservoirs
• Maintaining proper brake fluid levels for safe braking operation

Installation Notes and Tips

Installation of the Dorman 603-645 brake master cylinder reservoir requires removal of the old reservoir from the master cylinder. Since mounting hardware is not included, retain or replace any necessary fasteners during installation. Ensure the reservoir cap is securely tightened to prevent fluid leaks. After installation, bleed the brake system as needed to remove air and verify proper brake function.

Quality Assurance and Warranty

Dorman manufactures this brake master cylinder reservoir to meet or exceed OEM standards for fit and function. The plastic material is selected for durability and resistance to brake fluid corrosion. While specific warranty details are not provided, Dorman products typically come with a limited warranty against defects in material and workmanship.