JJ Engine Parts
2013 Cummins OEM ISX15 Control Module ECM ECU 5317106 5290171 5317107 5297106 CM2350
$1,000.00Unit price /UnavailableJJ Engine Parts
2004 Cummins OEM ISX Diesel Engine ECM ECU 3683289 3684008 3684009 3684008 CM870
$750.00Unit price /UnavailableJJ Engine Parts
Cummins OEM ISC Diesel Engine Control Module ECM ECU 4921776 4921797 CM850 EPA04
$750.00Unit price /UnavailableJJ Engine Parts
Cummins OEM ISX15 Control Module ECM ECU 5290171 5290170 CM2350
$1,000.00Unit price /UnavailableJJ Engine Parts
Cummins OEM Diesel Engine Control Module ECM ECU 4993120 4993121 CM2250
$1,000.00Unit price /UnavailableJJ Engine Parts
2010 Cummins OEM ISX15 Engine Control Module ECM ECU 4993121 4993120 CM2250
$1,000.00Unit price /UnavailableJJ Engine Parts
Cummins OEM QSM11 Engine Control Module ECM ECU 3408501 3408504 CM570
$2,000.00Unit price /UnavailableJJ Engine Parts
2017 Cummins OEM X15 Engine Control Module, ECM, ECU, 4384413, 4384412, CM2350
$1,500.00Unit price /UnavailableJJ Engine Parts
2015 Cummins OEM ISX15 Diesel Engine Control Module ECM ECU 5317106 5317107 CM2350
$1,000.00Unit price /UnavailableJJ Engine Parts
2012 Cummins OEM ISL Control Module ECM ECU 4993120 4993121 CM2250
$1,000.00Unit price /UnavailableJJ Engine Parts
2015 Cummins OEM ISX12 Control Module ECM ECU CM2350 5317106 5317107
$1,000.00Unit price /Unavailable- Sold out
JJ Engine Parts
Cummins OEM QSB4.5 Engine Control Module, ECM, ECU, 4993120, 4993121, CM2250
$1,000.00Unit price /Unavailable JJ Engine Parts
Cummins OEM ISX Diesel Engine Control Module ECM ECU 3683289 3684008 3684009 CM870
$750.00Unit price /Unavailable- Sold out
JJ Engine Parts
2012 Cummins OEM QSB4.5 Engine Control Module ECM ECU 4993120 4993121 CM2250
$1,000.00Unit price /Unavailable JJ Engine Parts
2012 Cummins OEM ISB6.7 Engine Control Module ECM ECU 4993120 4993121 CM2250
$1,000.00Unit price /UnavailableJJ Engine Parts
2012 Cummins OEM ISX15 Engine Control Module, ECM, ECU, 4993121, 4993120, CM2250
$1,000.00Unit price /UnavailableJJ Engine Parts
2020 Cummins OEM B6.7 Engine Control Module ECM ECU 4384412 4384413 CM2350
$1,000.00Unit price /Unavailable- Sold out
JJ Engine Parts
2010 Cummins OEM ISB6.7 Engine Control Module ECM ECU 4993120 4993121
$1,000.00Unit price /Unavailable

Used Diesel Engine Parts for Trucks & Fleet Repairs
JJ Engine Parts supports fleet operators, repair shops, and independent diesel mechanics who need dependable used diesel engine parts. Whether you are sourcing Cummins or Detroit engine parts, or supporting other diesel platforms, selecting the correct component is critical.
That’s why we focus on parts that match OEM specifications and real-world applications. Our inventory is structured to help customers quickly find the right solution for rebuilds, replacements, and legacy engine repairs.
Used Engine Components Available
Our collection includes used truck engine parts for sale that are commonly required in diesel repair and maintenance. Availability changes based on inventory, but supported components often include:
- Used ECM ECU for sale (OEM and inspected used options)
- Used turbochargers for sale
- Cooling system components
- Affordable used engine parts for budget-conscious repairs
- Used OEM components for major diesel platforms, including Detroit and Cummins engine parts
Each listing is reviewed for compatibility with specific engine models whenever possible and verified prior to shipment.

Nationwide Shipping & Fitment Assistance at JJ Engine Parts
We ship used diesel engine parts across the United States, depending on part size and destination. JJ Engine Parts regularly supports major diesel platforms, including Cummins, Detroit Diesel, Caterpillar, Volvo, and PACCAR engines. Browse our selection of used engine parts, or contact our team to help you source the right component for your diesel truck.
Frequently Asked Questions About Used Engine Parts
How do I find the correct used engine part?
How do I find the correct used engine part?
Fitment depends on your engine model and serial number. Contact us for assistance before ordering.
Are used ECM or ECU units available?
Are used ECM or ECU units available?
Yes. Used ECM ECU units are available in OEM and inspected options when in stock.
Do you sell used turbochargers?
Do you sell used turbochargers?
Yes. Used turbochargers are offered based on availability.
Are used OEM engine components reliable?
Are used OEM engine components reliable?
When properly inspected and matched to the correct engine, used OEM components can provide dependable performance.
Do you ship used truck engine parts nationwide?
Do you ship used truck engine parts nationwide?
Yes, we ship used engine parts across the United States, depending on part size and destination.