4 0 Mack V-Mac Engine Control Module (ECM) $1,000 USD (GOOD USED) Mack V-MAC E7 Diesel Engine Control Module, ECM, ECU, for sale!!!!!! Part #:12MS51M5;Other Part:12MS51M, 12MS51M2, 12MS51M3, 12MS51M4, 12MS51M5, 12MS51M6, 12MS51M7; Stock #:... ConditionUsedPart Number12MS51M5Stock NumberE4367 MLS Number14011288CategoryEngine Control Modules (ECM) Last Updated12/4/2025 LocationHialeah, FL, US Sold ByJJ Rebuilders Inc. (844) 385-___ SHOWNUMBERCall Seller Email Seller Save More Info