This booster is only for Sprinter models with the more common and shorter, aluminum brake master cylinder.
This is the identical unit sold at a franchise Dodge or Freightliner dealer.
It will not fit the early 2002 models with the longer, cast iron master cylinders. See other version shown below.
Sprinter 2002-2006 From VIN R400727 (later model year 2002 through 2006)