This is the mechanical transfer pump, which brings fuel from the fuel tank to the injection pump.Mounted on the front of the engine, this is the smaller of the two pumps and is directly above the injection pump.
The larger pump is the high pressure diesel injection pump, see below.
Both pumps are OEM Bosch manufactured and they are the identical pumps as those sold at a franchise dealership.
Detailed Description
Sprinter 2002-2003
Replaces the earlier problematic pump of a similar design.
Not used on 2004-2006 models, which have an electric pump located inside the fuel tank.