Dorman 904-849 Vacuum Pump

Reliable Vacuum Pump for Mercedes-Benz Models

The Dorman 904-849 vacuum pump is engineered to support the emission control and vacuum system needs of select Mercedes-Benz vehicles. Designed with durable aluminum housing and a gear drive system, this vacuum pump ensures consistent performance for models like the E350, GL350, ML350, R320, R350, and S350.

• Compatible with Mercedes-Benz E350, GL350, ML350, R320, R350, and S350 models
• Durable aluminum housing for long-lasting use
• Includes gasket for proper sealing
• Equipped with a relief valve for system protection
• Gear-driven vacuum pump with 0.320 inch inside diameter inlet and connector
• Barbed vacuum pump connector for secure hose attachment
• Part number 904-849 for precise identification

Product Features and Specifications

This vacuum pump features a gear drive system that provides reliable vacuum pressure essential for emission control and other vacuum-operated components in your Mercedes-Benz. The aluminum housing offers corrosion resistance and durability under engine bay conditions. The included gasket ensures a proper seal during installation, preventing leaks. A built-in relief valve protects the system from overpressure, enhancing safety and longevity. The vacuum pump inlet and connector both measure 0.320 inches in diameter, compatible with standard vacuum hoses. Note that this pump does not include a pulley or mounting hardware, so existing components must be reused or sourced separately.

Applications and Problem Resolution

• Restores vacuum pressure for brake boosters and emission control systems
• Replaces faulty or worn vacuum pumps causing engine performance issues
• Addresses vacuum leaks that trigger check engine lights or emission faults
• Supports proper operation of vacuum-operated accessories in Mercedes-Benz E350, GL350, ML350, R320, R350, and S350
• Prevents vacuum-related drivability problems such as rough idling or stalling

Installation Notes and Tips

When installing the Dorman 904-849 vacuum pump, ensure the gasket is properly seated to avoid vacuum leaks. Since mounting hardware and pulley are not included, verify that existing components are in good condition or obtain replacements as needed. The barbed connector requires secure hose attachment to maintain vacuum integrity. Follow vehicle-specific service manual instructions for removal and installation to ensure correct alignment and torque specifications.

Quality Assurance and Warranty

Dorman vacuum pumps are manufactured to meet or exceed OEM standards for fit, form, and function. The 904-849 part undergoes quality inspections to ensure reliable operation in Mercedes-Benz vacuum systems. This product includes a gasket to facilitate proper sealing and system performance. Warranty coverage details can be found through Dorman's official channels, providing assurance of product reliability.