MACK AMI, (USED) 2004 Mack AMI Diesel Engine Computer Module, ECM, ECU, Mack P/N: 12MS530M Bosch P/N: 0281020023 Stock #: E1856 For more information about this listing, shipping, technical questions email us at sales@jjrebuilders.com or call 1-800- 971-3019. We can