Caterpillar 3126, ECMs, (GOOD USED & BENCH TESTED w/ WARRANTY) Caterpillar 3126 Part # 145 7807-00 ECM For Sale, 40-PIN ECM, 1WM Prefix, Part # 145 7807 00, 145780700, UENDOL-NO, Off CAT 3126 40 PIN, Personality Part # 1438591-00, ECM Serial # 21970159CB, Stock # 8160 | Tested & Inspected!