Dorman 310-504 Evaporative Emissions System Leak Detection Pump

Evaporative Leak Detection Pump for BMW

Dorman 310-504 is an evaporative emissions system leak detection pump built to match the fit and function of the original unit on specified BMW applications. It uses a plastic housing, a black finish, and a male 3-blade connector to support reliable EVAP system operation.

Compatible with BMW 535i GT, 550i GT xDrive, 640i, 650i, X3, X4, X5, X6, 528i, 535i, 550i, 740i, 750i, M5, M6, and ActiveHybrid 5 applications across model years 2009-2017. Part number 310-504 is also cross-referenced to Standard Ignition LDP36 for the same application.

Key Features

• Direct-fit evaporative emissions system leak detection pump
• Designed to match original pump fit and function on listed BMW vehicles
• Plastic construction with black finish
• Includes a filter for the pump assembly
• Male 3-blade connector/terminal configuration
• Single-port design with 0.633 in. inlet and outlet outside diameters
• Measures 7.5 in. long and 2.2 in. in diameter

Detailed Description

Dorman 310-504 is an EVAP leak detection pump for BMW models that rely on a sealed evaporative emissions system to monitor fuel vapor integrity. It is engineered to replicate the original pump’s fit and function, helping restore proper system operation when the factory unit is no longer performing as expected. This part number 310-504 is a practical replacement for BMW 535i, 550i, X3, X5, and related applications listed in the fitment data.

This part cross-references Standard Ignition LDP36 for the same application.

What It Helps Address

• EVAP leak detection faults
• Check engine lights related to evaporative emissions monitoring
• Failed or inconsistent leak detection pump operation
• Fuel vapor system diagnostic trouble codes
• Emissions inspection issues tied to EVAP system faults

Installation Notes and Tips

Verify connector style, port size, and vehicle fitment before installation. This pump uses a male 3-blade connector and a single-port layout, so matching the original electrical and hose connections is important. Confirm the application against the listed BMW model and year range for Dorman 310-504 before replacing the existing unit.

Quality Assurance

Dorman designs this evaporative emissions leak detection pump to match original equipment fit and function on specified applications, with construction intended for dependable service in the EVAP system. The included filter supports proper pump operation within the emissions control system.