6 0 2003 Mack AC380/410 Engine Control Module (ECM) $800 USD (GOOD USED) 2003 Mack AC Diesel Engine Control Module, ECM, ECU, for sale!!!!, P/N: 12MS534M, Stock #: E2125 For more information about this listing, shipping, technical questions email... ConditionUsedPart Number12MS534MStock NumberE2125 MLS Number10612405CategoryEngine Control Modules (ECM) Last Updated1/6/2021 LocationHialeah, FL, US Sold ByJJ Rebuilders Inc. (844) 385-___ SHOWNUMBERCall Seller Email Seller Save More Info