Dorman 904-828 Vacuum Pump

Reliable Vacuum Pump for BMW 128i 328i 528i and More

The Dorman 904-828 vacuum pump is engineered to support the emission control and vacuum system needs of various BMW models. Designed with durable aluminum housing and a belt drive system, this vacuum pump ensures consistent performance for vehicles like the BMW 128i, 328i xDrive, and 528i xDrive.

• Compatible with BMW 128i, 323i, 328i, 328i xDrive, 328xi, 528i, 528i xDrive, 528xi, X3, X5, and Z4 models
• Aluminum housing for lightweight durability
• Includes gasket for proper sealing
• Equipped with a relief valve for pressure regulation
• Belt drive system with barbed vacuum pump connector
• Inside diameter of 0.613 inches for inlet and connector
• Part number 904-828 ensures exact fit and function

Technical Details and Construction

The Dorman 904-828 vacuum pump features a robust aluminum housing that provides strength while minimizing weight. It operates via a belt drive system, which is common in many BMW engines, ensuring compatibility and ease of integration. The pump includes a barbed vacuum connector and an inlet with an inside diameter of 0.613 inches, matching OEM specifications. A relief valve is incorporated to maintain proper vacuum pressure and protect the system from overpressure. Although the pulley and mounting hardware are not included, the package contains one pump assembly and a gasket to ensure a secure and leak-free installation.

Applications and Problem Resolution

This vacuum pump is designed for emission control and vacuum system applications in select BMW vehicles. It addresses several common issues, including:

• Loss of vacuum pressure affecting brake booster performance
• Emission control system malfunctions due to vacuum leaks
• Engine performance issues related to vacuum-operated components
• Relief valve failures causing inconsistent vacuum levels
• Wear or damage to original vacuum pump components

Installation Notes and Tips

When installing the Dorman 904-828 vacuum pump, ensure the following:

• Verify compatibility with your specific BMW model and engine type
• Use the included gasket to prevent vacuum leaks
• Inspect the belt drive system and replace worn belts if necessary
• Confirm the vacuum pump inlet and connector sizes match your vehicle’s vacuum lines
• Torque mounting bolts to manufacturer specifications (mounting hardware not included)

Quality Assurance and Warranty

Dorman vacuum pumps are manufactured to meet or exceed OEM standards for fit, form, and function. The 904-828 part number undergoes rigorous quality control to ensure reliable operation in BMW vehicles. This product includes a gasket for proper sealing and features a relief valve to protect the vacuum system. Warranty coverage details can be obtained from the product documentation or the manufacturer’s website.