This is a used ECM that fits UD 2600 trucks with the FE6TA engine from 2001-2004. OEM: Part#: 25947-Z5668, 25947-Z5579. Call for pricing and availability or if you have any further questions at 1-877-564-6307 and ask for Doug, RJ, RT, Ronnie, Louis, or Erika. 02-16-15