Send us your John Deere L12 Engine Control Module (ECM) and our certified technicians will fully recondition, test, and return it ready to install — no reprogramming needed. Compatible with part numbers RE532629, RE522527, RE532627, RE532628, RE518176, RE519774.

What's Included in the Repair Service

We perform a complete diagnostic and repair of your ECM. If the unit is not repairable or no fault is found, the diagnostic fee is $200 plus return shipping. A partial refund will be issued for the difference.

Compatible OEM Part Numbers

RE532629 | RE522527 | RE532627 | RE532628 | RE518176 | RE519774 | RE518177 | RE522528 | RE522529 | RE508774 | RE522509 | RE519775 | SE502848 | SE502849 | RE522510 | RE506664 | RM100467 | RE508842 | RE71447

Equipment Models Supported

444J / 444JR Forklift
544J Loader
120 / 120C Excavator
160CLC / 200CLC Excavator
2054 Excavator Logger
700H / 700J Crawler Dozer
750J Crawler Dozer
810D Forwarder
605C Crawler Loader
310G / 310J / 310SG Backhoe

Common ECM Failure Symptoms

Blowing fuses repeatedly
No communication with diagnostic tool
Engine shutting down unexpectedly
Active fault codes stored in the unit
Intermittent electrical faults
Oil or water intrusion damage
Machine won't start or lacks power
Restricted functionality

How the Process Works

Ship your ECM to our facility in Florida. We diagnose, repair, and return it with free return shipping. The entire process typically takes 3–5 business days after receipt.

Why Choose ECM Engineering USA

Over 15 years of ECM repair experience
More than 10,000 ECMs successfully repaired
Latest simulation and bench-testing technology
1-year warranty on all repairs
Free pre-shipment technical consultation

Warranty

Every repair is backed by a one-year warranty. Our engineers ensure your ECM is rebuilt for long-term reliability and peak performance in demanding field conditions.