3990517RX | Genuine Cummins® ECM Electronic Control Module

SKU: 3990517RX MPN: 3990517RX

Control your machine's heart with this Genuine Cummins Electronic Control Module. Part Number: 3990517RX. Condition: New. Compatible with ISB, QSB, ISC, and G8.3 engines in Hyundai forklifts, loaders, and excavators.

$1,649.00
No Core Charge
3 in stock

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Contact us to check if overnight next-day delivery is available for your order - PN: 3990517RX

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Product Description

Product Name ECM Electronic Control Module Product Name ECM Electronic Control Module
Condition New Condition New
Brand Cummins® Brand Cummins®
Part Number 3990517RX Part Number 3990517RX
Cross Reference 3990517, 3990517NX Cross Reference 3990517, 3990517NX
Engine Compatibility
Cummins ISB 5.9L, 6.7L Cummins ISB 5.9L, 6.7L
Cummins QSB 3.9L, 4.5L, 5.9L, 6.7L Cummins QSB 3.9L, 4.5L, 5.9L, 6.7L
Cummins ISC 8.3L Cummins ISC 8.3L
Cummins G8.3 (CM550–CM2250 ECM) Cummins G8.3 (CM550–CM2250 ECM)
Vehicle Compatibility
Hyundai Forklift 100D-7, 120D-7, 135D-7, 160D-7 Hyundai Forklift 100D-7, 120D-7, 135D-7, 160D-7
Hyundai Wheel Loader HL740-7, HL757-7, HL760-7 Hyundai Wheel Loader HL740-7, HL757-7, HL760-7
Hyundai Wheel Loader HL740TM-7, HL757TM-7 Hyundai Wheel Loader HL740TM-7, HL757TM-7
Hyundai Crawler Excavator R290LC-7 Hyundai Crawler Excavator R290LC-7

Useful Information

Description and Purpose:

OEM ECM Electronic Control Module. Part Number: 3990517RX. Brand: Cummins. Condition: New. This engine control unit is engineered for managing fuel injection, timing, and system diagnostics across Cummins-powered industrial equipment. Specifically compatible with ISB 5.9L, ISB 6.7L, QSB and ISC 8.3 engines, it fits select Hyundai forklifts, wheel loaders, and crawler excavators. Designed for high-load environments, this ECM ensures efficient communication between engine systems for consistent operation in construction and material handling applications. Cross reference: 3990517, 3990517NX

Why Replacement is Important:

A malfunctioning ECM can cause erratic engine behavior, failed startups, or inaccurate diagnostics. Replacing it restores control over key engine systems and prevents costly downtime.

Impact on Vehicle Performance:

Reinstates fuel efficiency, smooth engine response, and accurate control over powertrain components—crucial for machines operating under continuous heavy-duty cycles.

Manufacturer Information:

Cummins® is known globally for advanced diesel engine systems and electronic modules built to meet strict OEM requirements for industrial and commercial equipment.

Tags & Category: ECM module, electronic control module, Cummins ECM, engine computer, engine control unit, fuel injection control, Hyundai forklift ECM, wheel loader ECU, excavator electronic module, ISB 5.9L, ISB 6.7L, QSB 3.9, QSB 4.5, QSB 5.9, QSB 6.7, ISC 8.3, G8.3 CM550, CM850, CM2250, industrial equipment ECM, heavy machinery ECU, construction vehicle control module

Warranty:

Parts Finder Q offers a 365-days warranty for all types of parts in any condition. The -warranty applies exclusively to purchases made directly through our website (partsfinderq.com). Please note that purchases made through third-party platforms like eBay or Amazon are not covered by this warranty.

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  • Icon Truck, Fast Delivery
    Free shipping over $199 Place an order today and receive it on Mar 6
  • Clock Icon
    Orders placed before 7-PM EST will ship same business day
  • Location icon, warehouse pickup point.
    Pickup available usually ready in 24 hours
  • Need it fast? We offer overnight shipping

    Contact us to check if overnight next-day delivery is available for your order - PN: 3990517RX