Bosch 66860 Direct Injection High Pressure Fuel Pump

Bosch GDI High Pressure Pump for BMW

Bosch GDI High Pressure Pump 66860 is a direct injection high pressure fuel pump for gasoline applications. It is built on Bosch production lines and tested to the same quality standards used for Bosch OE fuel pumps, making it a practical replacement for BMW models that rely on stable high-pressure fuel delivery.

This Bosch GDI High Pressure Pump line focuses on premium fuel system performance for direct injection engines. Part number 66860 is a new, electric, external in-line pump with a metal housing, threaded inlet and compression outlet, and included fuel filter, gasket, O-ring, and seal components.

Key Features

• Direct injection high pressure fuel pump for gas engines
• New Bosch premium replacement, part number 66860
• External, bolt-on, electric in-line design
• Metal housing with threaded inlet and compression outlet
• Includes fuel filter, gasket, and O-ring
• Female square/rectangle connector with blade terminals
• OE-style Bosch manufacturing and testing standards

Detailed Product Overview

Bosch 66860 is engineered for BMW direct injection fuel systems that require consistent high-pressure fuel delivery. It uses a 14 mm inlet and 14 mm outlet, M14 x 1.5 inlet thread, M16 x 1.5 outlet thread, and a metered electric pump design. The unit is intended for gasoline fuel systems and is listed as an external, bolt-on replacement with one connector and two ports.

Compatible With BMW 230i, 230i xDrive, M240i, M240i xDrive, 430i, 430i Gran Coupe, 430i xDrive, 430i xDrive Gran Coupe, 440i, 440i Gran Coupe, 440i xDrive, 440i xDrive Gran Coupe, 530e, 530e xDrive, 530i, 530i xDrive, 540i, 540i xDrive, 330i, 330i GT xDrive, 330i xDrive, 340i GT xDrive, 640i xDrive Gran Turismo, 740e xDrive, 740i, 740i xDrive, X3, and X4 applications listed for 2016-2021 model years. This part cross-references BMW 13517642466 for the same application.

Common Problems This Pump Can Address

• Hard starting caused by insufficient high-pressure fuel delivery
• Fuel pressure loss in direct injection BMW engines
• Engine hesitation or stumble under load
• Fuel system faults related to pump wear or internal leakage
• Driveability issues tied to inconsistent injector supply pressure

Installation Notes and Tips

Verify the inlet and outlet thread sizes, connector style, and external mounting layout before installation. Replace worn seals and confirm the fuel filter and gasket surfaces are clean before assembly. Because this is a direct injection high pressure fuel pump, proper fuel system diagnosis and pressure verification are recommended before replacing related components.

Fits 2017-2021 BMW 230i, N/A; Fits 2017-2021 BMW 230i xDrive, N/A; Fits 2017-2021 BMW M240i, N/A; Fits 2017-2021 BMW M240i xDrive, N/A; Fits 2017-2020 BMW 430i, N/A; Fits 2017-2020 BMW 430i Gran Coupe, N/A; Fits 2017-2020 BMW 430i xDrive, N/A; Fits 2017-2020 BMW 430i xDrive Gran Coupe, N/A; Fits 2017-2020 BMW 440i, N/A; Fits 2017-2020 BMW 440i Gran Coupe, N/A; Fits 2017-2020 BMW 440i xDrive, N/A; Fits 2017-2020 BMW 440i xDrive Gran Coupe, N/A; Fits 2018-2020 BMW 530e, N/A; Fits 2018-2020 BMW 530e xDrive, N/A; Fits 2017-2020 BMW 530i, N/A; Fits 2017-2020 BMW 530i xDrive, N/A; Fits 2017-2020 BMW 540i, N/A; Fits 2017-2020 BMW 540i xDrive, N/A; Fits 2017-2019 BMW 330i, N/A; Fits 2017-2019 BMW 330i GT xDrive, N/A; Fits 2017-2019 BMW 330i xDrive, N/A; Fits 2017-2019 BMW 340i GT xDrive, N/A; Fits 2018-2019 BMW 640i xDrive Gran Turismo, N/A; Fits 2017-2019 BMW 740e xDrive, N/A; Fits 2016-2019 BMW 740i, N/A; Fits 2017-2019 BMW 740i xDrive, N/A; Fits 2018-2019 BMW X3, N/A; Fits 2019 BMW X4, N/A; Fits 2016-2018 BMW 330e, N/A; Fits 2016-2018 BMW 340i, N/A; Fits 2016-2018 BMW 340i xDrive, N/A.

Quality Assurance

Bosch builds this fuel pump on the same production lines used for Bosch OE fuel pumps and tests it to the same exacting standards. That manufacturing approach supports consistent fit and service life for BMW direct injection fuel system repairs.