This part will work on the following models:

NTL15920 - NORDICTRACK NORDIC TRACK 3100R NTL15921 - NORDICTRACK NORDIC TRACK 3100R NTTL18510 - NORDICTRACK NORDIC TRACK 5100 R TREADMILL NTTL18511 - NORDICTRACK NORDIC TRACK 5100 R TREADMILL NTTL18512 - NORDICTRACK NORDIC TRACK 5100 R TREADMILL NTTL18513 - NORDICTRACK NORDIC TRACK 5100 R TREADMILL NTTL18900 - NORDICTRACK NORDIC TRACK APEX 4100i TREADMILL NTTL18901 - NORDICTRACK NORDIC TRACK APEX 4100i TREADMILL NTTL18903 - NORDICTRACK NORDIC TRACK APEX 4100i TREADMILL NTTL18904 - NORDICTRACK NORDIC TRACK APEX 4100i TREADMILL NTTL18905 - NORDICTRACK NORDIC TRACK APEX 4100i TREADMILL NTTL18906 - NORDICTRACK NORDIC TRACK APEX 4100i TREADMILL NTTL18990 - NORDICTRACK NORDIC TRACK,APEX 4100 TREADMILL NTTL18991 - NORDICTRACK NORDIC TRACK,APEX 4100 TREADMILL NTTL18992 - NORDICTRACK NORDIC TRACK,APEX 4100 TREADMILL NTTL21990 - NORDICTRACK NORDIC TRACK,APEX 5100 TREADMILL NTTL21991 - NORDICTRACK NORDIC TRACK,APEX 5100 TREADMILL NTTL22900 - NORDICTRACK NORDIC TRACK APEX 5100i TREADMILL 298010 - NORDIC TRACK APEX 4100i TREADMILL 298011 - NORDIC TRACK APEX 4100i TREADMILL 298013 - NORDIC TRACK APEX 4100i TREADMILL 298014 - NORDIC TRACK APEX 4100i TREADMILL 298015 - NORDIC TRACK APEX 4100i TREADMILL 298016 - NORDIC TRACK APEX 4100i TREADMILL