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Caterpillar ECM — Replacement Engine Control Modules for All CAT Diesel Engines
OrderECM is a dedicated source for Caterpillar Engine Control Modules (ECM / ECU) covering the full range of CAT HEUI, MEUI, and ADEM-series diesel engines. Our CAT ECM stock spans the ADEM II, ADEM III, ADEM A4, and ADEM 4 generations — the four ECM platforms that underpin Caterpillar's engine lineup from the 3116 through to the C32 and G3500-series industrial engines.
We carry new OEM units, CAT Remanufactured (Reman, 10R/20R prefix) units, and verified used ECMs. All units are matched to engine model and serial number range before dispatch. Programming via Caterpillar ET software with the correct ESN is required after installation.
Browse by CAT Engine Model
- Caterpillar C7 / 3126 ECM — ADEM III HEUI, 70-pin and 120-pin
- Caterpillar C9 / C9.3 ECM — Excavator, truck, and industrial
- Caterpillar C10 / C12 ECM — 3406E cross-reference range
- Caterpillar C13 / C15 ECM — ACERT on-highway and industrial
- Caterpillar C6.4 / C6.6 ECM — Compact excavator and loader range
- Caterpillar Generator ECM — 3412, 3508, 3512, 3516 genset controllers
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365-day replacement warranty · Free worldwide shipping · ESN verification service available