John Deere RE532629 | L12 ECM Repair

Original price was: $890.00.Current price is: $790.00.

Is your John Deere L12 malfunctioning due to a faulty ECM (RE532629)? Our expert repair service can diagnose and fix your existing unit, saving you money on replacements. Get your machine or tractor back on track, fast!

We diagnose the unit, and if it’s not repairable or no problems are found, it costs $200 plus return shipping.

In this case, we will process a partial refund for the difference.


John Deere RE532629 L12 ECM Repair. Your ECM will be returned fully reconditioned, tested, and ready to be installed back to the exact vehicle it came off, saving you the time & expense of having a new ECM programmed to your machine.


John Deere RE532629 |  S/N: 340354

We first diagnose the unit; if it’s not repairable or no problems are found, it costs $200.

In this case, we will process a partial refund for the difference.


Our ECM repair service even has a one-year warranty. Our experts not only repair your ECM but also ensure that it’s built for reliability and long-lasting performance.

Other OEM Part Numbers:

RE518177, RE532628, RE519774, RE522528 , RE522529, RE508774, RE522509, RE508774, RE519774, RE519775, RE532628, SE502848, RE532627, RE532629, RE71447, SE502849, RE522510, RE506664, RE518176

Replaces previous part number RE522529.  Engine controller fits these John Deere equipment models:

  • 444JR Forklift
  • 120 Excavator
  • 700H Crawler Dozer
  • 810D Forwarder
  • 700J Crawler Dozer
  • 444J, 544J Loader
  • 160CLC, 200CLC Excavator
  • 120C Excavator
  • 2054 Excavator Logger
  • 750J Crawler Dozer
  • 605C Crawler Loader

Common Problems

  • Blowing fuses
  • No communication
  • Engine shutting down
  • Fault codes in the unit
  • Intermittent faults
  • Oil intrusion
  • Water damaged
  • Injector driver faults


You only need to ship your unit to us, and we will diagnose the faults and ship the fixed unit back.

Why trust us

Our engineering team has over 15 years of experience, more than 10K repaired ECMs, and the latest simulation technology. We are always happy to provide technical assistance. Before sending in your parts, feel free to contact us to discuss the faults you are experiencing.

The RE532629 ECM L12 is a crucial component, acting as the brain of your machine’s engine. It’s an Engine Control Module designed explicitly for L12 engines used in various John Deere applications, including agricultural equipment, construction machinery, and generators.

Key Features:
  • 24V Operation: Designed for 24V systems typically found in heavy-duty equipment.
  • Advanced Control: Manages critical engine functions like fuel injection, timing, turbocharger control, and exhaust gas recirculation (EGR) for optimal performance and emissions.
  • Durability: Built to withstand harsh operating conditions and vibrations commonly encountered in heavy machinery.
  • Diagnostics: Equipped with sophisticated diagnostic tools to help technicians quickly identify and resolve engine issues.
  • Software Updates: This may be upgradeable with newer software to improve performance or address evolving emissions regulations.


ECM Engineering USA / ECM Repair USA


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4 Steps

Additional information

Weight100 oz
Dimensions11 × 14 × 7 in