SKU: 75980221340

3684009RX Genuine Cummins ECM Engine Control Module

Sale price$449.55 Regular price$499.50
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Ships within 48 hours · Estimated delivery Jul 24 - Jul 29

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Description

3684009RX Genuine Cummins ECM Engine Control ModulePart details DESCRIPTION ECM Engine Control Module CONDITION Used BRAND Cummins PART NUMBER 3684009RX OTHER OEM PART NUMBERS THAT WILL WORK 3684009, , A26032331, P3684009, P3684009RX, 3684009NX, 3682729, 3682729RX, 3682729NX, 3683289, 3683289NX, 3683289RX, 3683287, 3683287NX, 3683287RX Function of this part The engine control module (ECM) is the electronic brain of the engine. It reads information from sensors and commands fuel delivery, timing, and

Part details

DESCRIPTION ECM Engine Control Module
CONDITION Used
BRAND Cummins
PART NUMBER 3684009RX
OTHER OEM PART NUMBERS THAT WILL WORK 3684009, , A26032331, P3684009, P3684009RX, 3684009NX, 3682729, 3682729RX, 3682729NX, 3683289, 3683289NX, 3683289RX, 3683287, 3683287NX, 3683287RX

Function of this part

The engine control module (ECM) is the electronic brain of the engine. It reads information from sensors and commands fuel delivery, timing, and other actuators to keep the engine running properly.

Why this part matters

Without a functioning ECM, the engine will not start or will run poorly. A correct, working ECM is essential for performance, diagnostics, emissions control, and protecting the engine from damage.

About the brand

Cummins engine parts are trusted for reliable power in a variety of heavy-duty truck and equipment applications.

Fitment & usage

Used OEM parts are a smart choice for controlling repair costs while still using original-equipment components. Always match the OEM part number(s) listed to your existing part, and consult your service manual, dealer, or technician if you are unsure about fitment.

Note: Because this is a used component, normal signs of wear such as scratches, discoloration, or light surface corrosion may be present. Refer to the product photos and information on Second Truck Parts for the best representation of the part you will receive.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 75980221340

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Keri J.
San Leandro, US
★★★★★ 5
Helps a lot!
Color: peach+urea
This helps with dry cracked heels more than anything else I’ve tried. Will order more. I put this on, then cover with a silicone heel cup for a couple hours.
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Reviewed in the United States on February 19, 2026
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PAULETTE K. ROBBINS
Whiting, US
★★★★★ 4
Good products
Color: peach+urea
Working just fine
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Reviewed in the United States on October 12, 2025
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katty
Bozeman, US
★★★★★ 5
Smell
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Work good
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Reviewed in the United States on January 9, 2026
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Kindle Customer
Carnegie, US
★★★★★ 1
No difference
Color: peach+urea
I haven't noticed any difference whatsoever
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Reviewed in the United States on November 14, 2025
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nya
Draper, US
★★★★★ 5
Exelente
Color: peach+urea
Lo macimo. Hidrata al 100porsiento
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Reviewed in the United States on March 4, 2026

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