Links for the 23 files for the 2001

https://www.nissan-techinfo.com/nissan/pdfs/sm/2001/xterra/fwd.pdf
https://www.nissan-techinfo.com/nissan/pdfs/sm/2001/xterra/gi.pdf
https://www.nissan-techinfo.com/nissan/pdfs/sm/2001/xterra/ma.pdf
https://www.nissan-techinfo.com/nissan/pdfs/sm/2001/xterra/em.pdf
https://www.nissan-techinfo.com/nissan/pdfs/sm/2001/xterra/lc.pdf
https://www.nissan-techinfo.com/nissan/pdfs/sm/2001/xterra/ec.pdf
https://www.nissan-techinfo.com/nissan/pdfs/sm/2001/xterra/fe.pdf
https://www.nissan-techinfo.com/nissan/pdfs/sm/2001/xterra/cl.pdf
https://www.nissan-techinfo.com/nissan/pdfs/sm/2001/xterra/mt.pdf
https://www.nissan-techinfo.com/nissan/pdfs/sm/2001/xterra/at.pdf
https://www.nissan-techinfo.com/nissan/pdfs/sm/2001/xterra/tf.pdf
https://www.nissan-techinfo.com/nissan/pdfs/sm/2001/xterra/pd.pdf
https://www.nissan-techinfo.com/nissan/pdfs/sm/2001/xterra/ax.pdf
https://www.nissan-techinfo.com/nissan/pdfs/sm/2001/xterra/su.pdf
https://www.nissan-techinfo.com/nissan/pdfs/sm/2001/xterra/br.pdf
https://www.nissan-techinfo.com/nissan/pdfs/sm/2001/xterra/st.pdf
https://www.nissan-techinfo.com/nissan/pdfs/sm/2001/xterra/rs.pdf
https://www.nissan-techinfo.com/nissan/pdfs/sm/2001/xterra/bt.pdf
https://www.nissan-techinfo.com/nissan/pdfs/sm/2001/xterra/ha.pdf
https://www.nissan-techinfo.com/nissan/pdfs/sm/2001/xterra/sc.pdf
https://www.nissan-techinfo.com/nissan/pdfs/sm/2001/xterra/el.pdf
https://www.nissan-techinfo.com/nissan/pdfs/sm/2001/xterra/idx.pdf
https://www.nissan-techinfo.com/nissan/pdfs/sm/2001/xterra/foldout.pdf

Put them all in the same directory and you can navigate from file to file with the index.