Peterbilt & Freightliner ECM Modules
Remanufactured engine control modules for Peterbilt and Freightliner Class 8 trucks. Every ECM is bench-tested, warrantied, and ready to install. No core charge. Fast shipping nationwide.
Shop by Brand
Select your truck brand to find the right ECM for your engine.
Peterbilt ECMs
ECMs for Peterbilt 379, 389, 386, 367, 365, 337, and more. Cummins ISX, ISX15, ISM, and ISL powered trucks.
View Peterbilt ECMs →Freightliner ECMs
ECMs for Freightliner Cascadia, Columbia, Century, FLD120, M2, and more. Detroit Diesel and Cummins engines.
View Freightliner ECMs →Peterbilt ECM Categories
Freightliner ECM Categories
Peterbilt & Freightliner ECM Replacement Modules
When your Peterbilt or Freightliner ECM fails, every hour of downtime costs you money. Diesel ECM Exchange gets you back on the road fast with remanufactured ECM modules that are bench-tested, warrantied, and ready to drop in. No dealer markup, no unnecessary delays.
Peterbilt ECM Modules
We carry ECMs for the most popular Peterbilt models on the road today. Whether you're running a 379 with a Cummins N14 or a 389 with an ISX15, we have the module you need:
- Peterbilt 379 — Cummins ISX, N14, Celect/Celect Plus, and Caterpillar 3406E/C15 ECMs.
- Peterbilt 389 — Cummins ISX15 and PACCAR MX-13 ECMs for the 389’s current and previous generations.
- Peterbilt 386 & 367 — Aerodynamic day cab and heavy-haul configurations with Cummins and PACCAR power.
- Peterbilt 365, 337, 330 — Vocational and medium-duty applications running PACCAR PX-7, Cummins ISB, and ISL engines.
Freightliner ECM Modules
Freightliner is the best-selling Class 8 truck in North America, and we stock ECMs for every major model in the lineup:
- Freightliner Cascadia — Detroit DD13, DD15, DD16, and Cummins ISX ECMs. The Cascadia is the workhorse of long-haul fleets, and we keep these modules in stock for fast turnaround.
- Freightliner Columbia — Detroit Series 60, Cummins ISX, and Caterpillar C15 ECMs for the Columbia’s full production run.
- Freightliner Century & FLD120 — Legacy models running Detroit Series 60, Caterpillar 3406E/C15, and Cummins N14 engines.
- Freightliner M2 — Medium-duty ECMs for Cummins ISB, ISC, ISL, and the newer Detroit DD5/DD8 platforms.
Why Choose Diesel ECM Exchange?
- Bench Tested — Every ECM goes through a full functional test before it ships.
- Lifetime Warranty — We stand behind every module we sell.
- No Core Charge — Keep your old unit or send it back. No upfront core fee.
- Fast Shipping — Same-day shipping on most orders placed before 2 PM EST.
- Expert Support — Call us at 1-800-446-0917 and talk to someone who knows diesel trucks.
Need Help Finding the Right ECM?
Not sure which ECM fits your truck? Give us a call at 1-800-446-0917 or send us your truck’s VIN and engine serial number. We’ll match you with the exact module you need — no guesswork, no returns.