0 0 1994 Mack E7 Engine Control Module (ECM) for a Mack CH $1,275 USD (USED) Mack E7 Serial #: 1252420 CPL/Arr: - HP: 400 Ref# 12MS51M7X ConditionUsedFits To Make(s)MackFits To Model(s)CHPart Number12MS51M7XStock Number25890495 MLS Number13962294CategoryEngine Control Modules (ECM) Last Updated11/2/2025 LocationKansas City, MO, US Sold ByVander Haag's Inc. (855) 370-___ SHOWNUMBERCall Seller Email Seller Save More Info