JJ Engine Parts
Cummins ISX12 OEM Diesel Engine Control Module ECM ECU 4993120 4993121 CM2250
$1,000.00Unit price /UnavailableJJ Engine Parts
Detroit DD15 OEM Diesel Engine Control Module ECM ECU A0024460935
$800.00Unit price /UnavailableJJ Engine Parts
Cummins N14 Celect Plus Diesel Engine Valve Cover 3075016
$150.00Unit price /UnavailableJJ Engine Parts
Mercedes Benz OM460LA OEM Diesel Engine Control Module ECM ECU 0014466440
$550.00Unit price /UnavailableJJ Engine Parts
Caterpillar 3456 Engine Control Module ECU ECU 9BZ 212-9449 235-1571 176-5782
$2,000.00Unit price /UnavailableJJ Engine Parts
Detroit DD15 OEM Diesel Engine Control Module ECM ECU A0014465835
$800.00Unit price /UnavailableJJ Engine Parts
Cummins QSB6.7 OEM Engine Control Module ECM ECU 4993120 4993121 CM2250
$1,000.00Unit price /Unavailable- Sold out
JJ Engine Parts
International Maxxforce 9 OEM Engine Control Module ECM ECU 7095136C91
$2,500.00Unit price /Unavailable JJ Engine Parts
Cummins QSB4.5L Diesel Engine Control Module ECM ECU 5317106 5317107 CM2350
$1,000.00Unit price /UnavailableJJ Engine Parts
Detroit Diesel After-treatment Control Module ACM 2.1 A0004469454
$800.00Unit price /UnavailableJJ Engine Parts
Cummins ISL9 Control Module ECM ECU 5290170 5290171 CM2350 5317107 5317106
$1,000.00Unit price /UnavailableJJ Engine Parts
Cummins ISM OEM Engine Control Module ECM ECU 3103533 CM875
$1,500.00Unit price /UnavailableJJ Engine Parts
Caterpillar C9.3 Diesel Engine Control Module ECM ECU 521-0791-02 521-0791
$2,000.00Unit price /UnavailableJJ Engine Parts
International VT365 Control Module ECM 1839368C4 4307224R1
$800.00Unit price /UnavailableJJ Engine Parts
International DT570 Control Module ECM 1839368C2 1874251C91 1845117C5
$1,000.00Unit price /UnavailableJJ Engine Parts
Caterpillar C4.4 OEM Diesel Engine Control Module ECU ECM 331-7539-00
$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.