View 2 Photos View 0 Videos Caterpillar 3126 Engine Control Module (ECM) $800 USD Good used, cleaned, tested and inspected CAT 3126 ECM. Part Number: 179-1747, 10R-8732. 30 Day Guarantee for swap or refund if not programmable. ECM's need to be programmed for your... ConditionUsedFits To Make(s)CATERPILLARFits To Model(s)3126Part Number179-1747Stock NumberRyd 179-1747 MLS Number10263033CategoryEngine Control Modules (ECM) Last Updated4/14/2026 LocationFitchburg, MA, US Sold ByRydemore Heavy Duty Truck Parts (888) 519-___ SHOWNUMBERCall Seller Email Seller Save More Info