Dorman 904-838 Vacuum Pump

Reliable Vacuum Pump for Audi and Volkswagen Vehicles

The Dorman 904-838 vacuum pump is engineered to support emission control systems in select Audi and Volkswagen models. Designed with durable aluminum housing and a gear drive system, this vacuum pump ensures consistent performance for vehicles like the Audi Q3 and Volkswagen Tiguan.

• Aluminum housing for lightweight durability
• Gear drive vacuum pump drive system
• Includes relief valve for pressure regulation
• Barbed vacuum pump connector for secure hose attachment
• Inside diameter of 0.346 inches for inlet and connector
• Package includes 1 pump assembly and 1 gasket
• No pulley, mounting hardware, or additional seals included

Technical Details and Construction

The Dorman 904-838 vacuum pump features a robust aluminum housing that provides corrosion resistance and long service life. Its gear drive system ensures reliable vacuum generation necessary for emission control and brake booster functions. The included relief valve helps maintain proper pressure levels, preventing system damage. The barbed vacuum pump connector and 0.346-inch inside diameter inlet facilitate secure and efficient hose connections. This pump is supplied with a gasket to ensure a proper seal during installation.

Compatible Vehicles and Applications

This vacuum pump is compatible with various Audi and Volkswagen models, including the Audi Q3, Q3 Quattro, and Volkswagen Beetle, GTI, Tiguan, and Tiguan Limited. It is designed specifically for emission control vacuum systems in these vehicles, helping to maintain optimal engine performance and reduce emissions.

• Supports emission control system vacuum requirements
• Helps maintain brake booster vacuum for safe braking
• Addresses vacuum leaks that cause engine performance issues
• Prevents rough idling caused by vacuum system failures
• Reduces emission control malfunctions related to vacuum loss

Installation Notes and Tips

When installing the Dorman 904-838 vacuum pump, ensure the gasket is properly seated to prevent vacuum leaks. The pump does not include mounting hardware or a pulley, so reuse existing components or source compatible parts as needed. Verify the barbed connector and inlet size match your vehicle’s vacuum lines for a secure fit. Proper torque specifications should be followed to avoid damage to the aluminum housing.

Quality Assurance and Warranty

Dorman vacuum pumps are manufactured to meet or exceed OEM specifications for fit, form, and function. The 904-838 part number undergoes rigorous quality control to ensure durability and reliable operation in emission control systems. Warranty coverage details can be obtained from the product documentation or manufacturer.