Mercedes Sprinter High-Pressure Fuel Pump – Genuine OEM | NCV3 & VS30 2.1L OM651 BlueTEC | #6510702801 (2010–2018)

A failing high-pressure fuel pump on a Sprinter OM651 collapses the rail pressure the common-rail injection system requires to atomize fuel effectively — causing hard starts, power loss under load, rough idle, limp mode, and fuel pressure fault codes that won't resolve until the pump is replaced. This is the Genuine Mercedes-Benz OEM high-pressure fuel pump for NCV3 and VS30 Sprinters equipped with the 2.1L OM651 BlueTEC diesel engine, a direct replacement that restores correct common-rail fuel pressure and reliable injection system performance.

What This Part Does

The high-pressure fuel pump is a camshaft-driven plunger pump that takes low-pressure fuel from the lift pump and compresses it to the pressure required for the OM651's common-rail direct injection system. It feeds this pressurized fuel continuously into the fuel rail, which distributes it to the injectors. The pump's output pressure is regulated by a metering valve that the ECU controls — allowing the system to vary rail pressure based on engine load, RPM, and injection strategy. When the pump's internal plungers or check valves wear, or its metering valve develops a fault, rail pressure becomes unstable — causing the rough running, extended cranking, power loss, and fuel pressure fault codes that signal pump failure.

Common Symptoms of a Failing High-Pressure Fuel Pump

• Hard starting or extended cranking before the engine fires, particularly when cold
• Loss of power or sluggish acceleration under load, especially at highway speeds
• Rough idle that worsens as the pump's output drops further below specification
• Fuel pressure fault codes or rail pressure plausibility codes from the ECU
• Engine entering limp mode from fuel system pressure monitoring failure
• Black smoke under acceleration from incomplete combustion caused by low rail pressure

When to Replace

Replace when rail pressure testing confirms the pump cannot reach or sustain specification under load. Always replace the fuel filter at the same time — contaminated fuel is a primary cause of pump failure, and a new pump on a dirty filter will fail prematurely. Flush the fuel system before installation to remove any debris from the failed pump.

NCV3 & VS30 OM651 Specific — VIN Verification Required

This high-pressure fuel pump is for NCV3 and VS30 Sprinters equipped with the 2.1L OM651 BlueTEC diesel engine. It is not compatible with OM642 or OM654 engines. Always verify your engine code and VIN before ordering. Contact us and we'll confirm fitment before you buy.

Fitment

• 2010–2018 Mercedes-Benz Sprinter 2500 / 3500 – 2.1L OM651 BlueTEC (NCV3/W906)
• 2010–2018 Freightliner Sprinter 2500 / 3500 – 2.1L OM651 BlueTEC (NCV3)
• 2019+ Mercedes-Benz Sprinter 1500 / 2500 / 3500 – 2.1L OM651 BlueTEC (VS30/W907)

✔ Always replace fuel filter when replacing the high-pressure pump
✔ OM651 2.1L only — not compatible with OM642 or OM654
✔ Always verify VIN before ordering

Part Numbers

• Mercedes OEM: 6510702801 / A6510702801 / 651-070-28-01
• Full OEM with suffix: 651070280187
• Manufacturer: Genuine Mercedes-Benz
• SKU: 651070280187OE