Mercedes Sprinter High-Pressure Fuel Pump – Bosch Genuine | OM646 2.1L | #6460700401 (2007–2009)

DESCRIPTION:

The high-pressure fuel pump is the heart of the OM646's common rail fuel system — and when it fails, the consequences are immediate. Loss of power, hard starting, rough running, and low rail pressure fault codes all point to a pump that can no longer generate the pressure the system needs. This is the Bosch Genuine remanufactured CP3 high-pressure fuel pump for the NCV3 Sprinter with the OM646 2.1L 4-cylinder diesel, rebuilt to OEM specification and delivering the same fuel rail pressure as the original unit.

What This Part Does

The high-pressure fuel pump pressurizes diesel fuel from the low-pressure supply and delivers it to the common fuel rail at up to 1,600 bar, where it's stored until individual injectors release precise bursts into the combustion chambers. The OM646 uses a Bosch CP3 radial piston pump driven off the camshaft. When internal components wear, the pump can no longer maintain adequate rail pressure — causing misfires, power loss, and injector performance issues even when the injectors themselves are functional.

Bosch Genuine Remanufactured — What That Means

This unit is remanufactured by Bosch — the original manufacturer of the pump. It's rebuilt using genuine Bosch components and tested to the same pressure and flow specifications as a new unit. This is not an offshore aftermarket copy — it carries Bosch's quality assurance and is the recommended replacement when a new OEM unit is not available.

Common Symptoms of a Failing High-Pressure Pump

• Low fuel rail pressure fault codes
• Hard starting or extended crank times
• Rough idle or misfires across multiple cylinders
• Loss of power under load
• Black smoke and poor fuel economy

Important: VIN Verification Required

This pump is application-specific. Fitment varies by engine code, production date, and emissions specification. Always verify your OEM part number before ordering. Contact us with your VIN and we'll confirm fitment before you buy.

Fitment

• 2007–2009 Mercedes-Benz Sprinter 2500 – 2.1L L4 Diesel (OM646)
• 2007–2009 Mercedes-Benz Sprinter 3500 – 2.1L L4 Diesel (OM646)
• 2007–2009 Dodge Sprinter 2500/3500 – 2.1L L4 Diesel (OM646)

Part Numbers

• Mercedes OEM: 6460700401 / A6460700401 / 646-070-04-01
• Bosch Genuine Reman: 0 986 437 364 / 0986437364
• Cross Reference: 646070040160, 646070040180, 0445010143, 6480700001
• SKU: 646070040180