Dorman 603-642 Brake Master Cylinder Reservoir

Overview of Dorman Brake Master Cylinder Reservoir 603-642

The Dorman brake master cylinder reservoir 603-642 is designed for reliable brake fluid containment in select Audi and Volkswagen models. Constructed from durable plastic with a white finish, this reservoir includes a cap and features a single mounting hole for straightforward installation.

• Material: Durable plastic construction
• Color: White for easy fluid level visibility
• Includes cap for secure sealing
• Single mount hole for direct fitment
• Non-pressurized design
• Package contains one brake master cylinder reservoir

Product Details and Specifications

This brake master cylinder reservoir by Dorman is engineered to meet the specifications required for various Audi and Volkswagen vehicles, including models such as the Audi 80, 80 Quattro, 90, 90 Quattro, 100, 100 Quattro, 200, 200 Quattro, 5000 Quattro, A4, A4 Quattro, A6, A6 Quattro, Cabriolet, Coupe Quattro, Passat, and S4. The plastic material ensures resistance to brake fluid corrosion while maintaining structural integrity. The white color allows for quick visual inspection of brake fluid levels. The included cap helps prevent contamination and fluid leakage. The single mounting hole simplifies installation without the need for additional hardware, which is not included.

Compatible Vehicles and Common Applications

This reservoir is compatible with a range of Audi and Volkswagen models, making it suitable for brake system maintenance and repairs on these vehicles. It is commonly used to address issues such as:

• Brake fluid leaks from a damaged or cracked reservoir
• Contaminated or deteriorated reservoir caps causing fluid contamination
• Inaccurate brake fluid level readings due to discolored or opaque reservoirs
• Replacement during brake system overhauls or master cylinder repairs
• Preventing air entry into the brake hydraulic system

Installation Notes and Tips

When installing the Dorman brake master cylinder reservoir 603-642, ensure the brake system is depressurized and the vehicle is securely supported. Carefully remove the old reservoir and clean the mounting area before installing the new part. Since mounting hardware is not included, retain original fasteners or source compatible hardware. Verify the cap is properly seated to maintain system integrity. After installation, bleed the brake system as necessary to remove air and check for leaks.

Quality Assurance and Warranty Information

Dorman manufactures this brake master cylinder reservoir to meet or exceed OEM standards for fit, form, and function. The plastic construction is designed to resist brake fluid corrosion and maintain durability under normal operating conditions. While specific warranty details are not provided here, Dorman typically offers limited warranties on their replacement parts. Consult product documentation or the supplier for exact warranty terms.