Follow this link to a list of downloadable xterra factory service manuals (.pdf files). The FSM's are a much more thorough and detailed guide to both routine maintenance and repairs. Click on your year model xterra then download the individual files.
You click the link he posted above, then click the link for the year of Xterra you have.
Inside that "folder" you'll see all of the PDF's. Each PDF is a section of the owners manual, and the FWD.pdf should be the front section that lists what letter code the other sections are (Example: EM.PDF would be Engine Mechanical).
I know the 2001 version I have, if you download all of the PDF's into the same folder, you can click links built into the PDF that will take you to the page you need even if it's in one of the other sections PDF files (I know this works with Foxit PDF Reader anyhow, and should with Adobe)
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