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ECM Authority specializes in diesel engine control module (ECM) and Freightliner CPC4 repair for heavy-duty trucks. We provide component-level diagnostics and repair for Cummins, Detroit Diesel, and PACCAR systems with fast turnaround and nationwide mail-in service.

Precision component-level repair with lab-grade diagnostics, professional programming, and bench testing. All modules can be coded to your VIN number and specifications.