It plugs into the fuel rail and the fuel line. there's another hose on top, which I THINK is a vacuum line, and a 3 prong electrical connector. the part that plugs into the fuel line has a blue washer on it, and it's held on with 2 10mm hex head screws... AutoZone, O'Reily's, and Napa had no clue what the part is, or where I could get it replaced other than 'check with Ford'... sooooo... help?!

Cars & Trucks - Ford - Focus - 2003 Ford Focus