Caterpillar 3126, ECMs, (GOOD USED & BENCH TESTED W/ WARRANTY) Caterpillar 3126 Part # 145-7807-00 ECM For Sale, 40-PIN ECM, 1WM Serial, Part # 145 7807 00, 145780700, Off CAT 3126 40 PIN Engine, Personality # 1554523-00, NEUNSK-NO, 211HP @2400 RPM, ECM Serial # 27370016CB, Stock # 8091 | Tested & Inspected!