This is a replacment MC-90 Motor Control Board for select Image, NordicTrack, and Reebok Treadmills. Part Number 156440 Model Numbers IMTL24490 IMTL24491 NTTL24080 RBTL19980 RBTL19981 Check Model Number in Detail Description. Maintenance Tip: #1 Reason for Motor Control Board Failure is a lack of Walking Belt Lubrication. Tryout our World Famous Treadmill Lube. There are no comparisons!