JJ Engine Parts
2014 Cummins ISX12 Control Module, ECM, ECU, CM2350, 5317106, 5317107
$1,000.00Unit price /Unavailable- Sold out
JJ Engine Parts
Cummins ISB OEM Diesel Engine Control Module ECM ECU 3965159 CM850
$750.00Unit price /Unavailable JJ Engine Parts
Cummins ISX15 EPA10 Computer Module ECM ECU 4993120 4993121 CM2250
$1,000.00Unit price /UnavailableJJ Engine Parts
Cummins QSX11.9 Engine Control Module ECM ECU 4993120 4993121 CM2250
$1,000.00Unit price /UnavailableJJ Engine Parts
Cummins ISX15 OEM Engine Control Module ECM ECU 4358814 4358817 CM2350
$1,000.00Unit price /UnavailableJJ Engine Parts
Cummins QSX15 OEM Diesel Engine Control Module ECM ECU 5317106 5317107 CM2350
$1,000.00Unit price /UnavailableJJ Engine Parts
Cummins ISX OEM Engine Control Module ECM ECU 3684275 3684276 CM871
$2,000.00Unit price /UnavailableJJ Engine Parts
Cummins ISC Diesel Engine Control Module, ECM, ECU, 4921776, 4921797, CM850
$750.00Unit price /Unavailable- Sold out
JJ Engine Parts
Cummins ISL9 Diesel Engine Control Module ECM ECU 5317106 5317107 CM2350
$1,000.00Unit price /Unavailable JJ Engine Parts
Cummins QSB OEM 6.7L Diesel Engine Control Module ECM ECU 5317107 5317106 CM2350
$1,500.00Unit price /UnavailableJJ Engine Parts
Cummins ISX12 OEM Computer Module, ECM, ECU, 4993120, 4993121, CM2250
$1,000.00Unit price /UnavailableJJ Engine Parts
Cummins ISX Diesel Engine ECM, ECU, CM870, 3684009RX, 3684008
$750.00Unit price /UnavailableJJ Engine Parts
Cummins ISX12 OEM Engine Control Module ECM ECU 4993120, 4993121, CM2250
$1,000.00Unit price /UnavailableJJ Engine Parts
Cummins ISX OEM Engine Control Module ECM ECU 3684275 3684276 CM871
$2,000.00Unit price /UnavailableJJ Engine Parts
Cummins X15 OEM Engine Control Module ECM ECU 4384413 4384412 CM2350
$1,500.00Unit price /UnavailableJJ Engine Parts
Cummins ISL G OEM Engine Control Module, 4359433, 5291537, 2897462, 4940696
$750.00Unit price /UnavailableJJ Engine Parts
Cummins ISX15 OEM CM2350 Diesel Engine ECM, ECU, 5290170, 5290171
$0.00Unit price /UnavailableJJ Engine Parts
Cummins ISX12 OEM Control Module ECM ECU 4993120 4993121 CM2250
$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.