Bosch 66839 Direct Injection High Pressure Fuel Pump

Bosch GDI High Pressure Pump 66839

Bosch GDI High Pressure Pump 66839 is a new electric direct injection high pressure fuel pump for gasoline applications. It is built for external, in-line mounting and is engineered to support precise fuel delivery for vehicles that rely on high-pressure gasoline direct injection systems.

Compatible With 2017-2019 Nissan Sentra and 2015-2017 Nissan Juke, this Bosch fuel pump is a direct injection high pressure fuel pump that supports consistent fuel pressure at the engine. The Bosch 66839 is part of the Bosch GDI High Pressure Pump line, which focuses on premium aftermarket fuel delivery components built to OE-level production and testing standards.

Key Features

• Direct injection high pressure fuel pump for gasoline engines
• Electric, battery-powered fuel pump design
• External, in-line mounting with bolt-on installation
• Metal and steel housing construction
• Includes filter, gasket, and O-ring
• Single female connector with blade terminals
• Quick-connect/threaded inlet and compression outlet
• New premium-grade replacement part

Product Details

Bosch 66839 is built for fuel injection systems that require a high-pressure pump to maintain proper delivery to the engine. It features a square/rectangle connector shape, one inlet and one outlet, and a metered design for controlled fuel flow. The pump uses a synthetic or NBR rubber gasket material and a metal housing for durability in demanding underhood conditions. This part cross-references 16630HY00A for the same application.

Common Issues This Pump Can Help Address

• Low fuel pressure in a gasoline direct injection system
• Hard starting caused by inadequate high-pressure fuel delivery
• Engine hesitation or stumble under load
• Fuel delivery faults related to a worn external high pressure pump
• Pressure loss from a failing pump housing, seal, or internal wear

Installation Notes

Verify the inlet and outlet sizes, connector style, and mounting layout before installation. This Bosch fuel pump is an external, bolt-on unit with no wiring harness included, so the existing vehicle harness and fuel line connections must match the pump configuration. Confirm vehicle application by year, make, and model before ordering; this part is listed for 2017-2019 Nissan Sentra and 2015-2017 Nissan Juke.

Quality Assurance

Bosch manufactures these aftermarket fuel pumps on the same production lines used for Bosch OE fuel pumps and tests them to the same quality standards. That manufacturing approach supports reliable service life and consistent performance for direct injection fuel systems.