Delphi HM10109 Direct Injection High Pressure Fuel Pump

Overview of Delphi HM10109 Direct Injection High Pressure Fuel Pump

The Delphi HM10109 is a mechanical direct injection high pressure fuel pump designed for select Infiniti and Mercedes-Benz models. Engineered with a durable metal housing and precise inlet and outlet fittings, this fuel pump supports efficient fuel delivery for gas engines requiring reliable performance.

• Compatible with Infiniti Q50, Q60, and Mercedes-Benz C300, C350e, E300, GLC300, GLC350e, Metris, SLC300, SLK300, Sprinter 1500, and Sprinter 2500
• Mechanical pump type with external mounting
• Metal housing in silver finish for durability
• Inlet outside diameter of 0.313 inches with hose inlet type
• Two threaded outlets with M14-1.5 fitting size
• Blade terminal type with two male terminals
• Includes gasket or seal; mounting hardware and wiring harness not included
• Standard replacement grade with instruction sheet included

Technical Details and Specifications

The HM10109 fuel pump features a mechanical design optimized for direct injection systems in gas-powered vehicles. Its external mounting configuration allows for straightforward installation on compatible Infiniti and Mercedes-Benz models. The pump’s inlet uses a hose connection with a 0.313-inch outside diameter, while the two threaded outlets utilize M14-1.5 fittings to ensure secure fuel line attachment. The metal housing provides structural integrity and heat resistance, finished in silver for corrosion protection. Electrical connections are made via two male blade terminals, supporting reliable power delivery without included wiring harness. This pump comes with a gasket or seal to maintain a proper fuel-tight installation.

Compatible Vehicles and Applications

This Delphi direct injection high pressure fuel pump is compatible with a range of Infiniti and Mercedes-Benz vehicles, including:

• Infiniti Q50 and Q60
• Mercedes-Benz C300, C350e, E300
• Mercedes-Benz GLC300, GLC350e
• Mercedes-Benz Metris
• Mercedes-Benz SLC300, SLK300
• Mercedes-Benz Sprinter 1500 and 2500

It is designed to replace the original mechanical fuel pump in these models, ensuring consistent fuel pressure for optimal engine performance.

Common Issues Addressed by HM10109 Fuel Pump

• Fuel delivery interruptions causing engine hesitation or stalling
• Low fuel pressure affecting direct injection system efficiency
• Fuel pump noise or mechanical failure
• Leaks due to worn seals or damaged pump housing
• Inconsistent engine performance under load or acceleration

Installation Notes and Tips

Installation of the Delphi HM10109 requires removal of the existing external mechanical fuel pump. Ensure the fuel system is depressurized before beginning work. The included gasket or seal must be properly seated to prevent leaks. Note that mounting hardware and wiring harness are not included and may need to be reused or sourced separately. Verify terminal connections match the vehicle’s wiring configuration. Follow the instruction sheet carefully to maintain correct torque specifications and alignment.

Quality Assurance and Warranty

Delphi manufactures the HM10109 as a standard replacement part meeting OEM specifications for fit, form, and function. The metal housing and quality components contribute to reliable operation under normal driving conditions. This fuel pump includes a gasket or seal to support proper installation. Warranty coverage details should be confirmed with the point of purchase or Delphi directly, as coverage may vary.