- Sold out
JJ Engine Parts
Cummins ISM OEM Diesel Engine Control Module ECM ECU 3103533 CM875
$0.00Unit price /Unavailable - Sold out
JJ Engine Parts
Allison 3500RDS Automatic Transmission 6511092613 PTO Application
$3,250.00Unit price /Unavailable JJ Engine Parts
Detroit Diesel After-treatment Control Module ACM 2.2 A0004461554
$800.00Unit price /UnavailableJJ Engine Parts
Cummins ISB QSB4.5L Electronic Control Module Wiring Harness 5444412 CM2250
$650.00Unit price /UnavailableJJ Engine Parts
Eaton Fuller FM-14E310B-LAS Automatic off Freightliner Cascadia
$2,800.00Unit price /UnavailableJJ Engine Parts
Dayco Cummins Belt Tensioner P568352 0655164 180892 3281583 3934821
$45.00Unit price /UnavailableJJ Engine Parts
Detroit DD13 Diesel Engine Control Module ECM ECU A0004467635 EPA10
$800.00Unit price /Unavailable- Sold out
JJ Engine Parts
Mack AMI Diesel Engine Control Module ECM ECU 12MS530AM
$600.00Unit price /Unavailable JJ Engine Parts
Paccar MX-13 Diesel Engine Electronic Unit Pump 1827043 1861200
$350.00Unit price /UnavailableJJ Engine Parts
Cummins ISX12 Engine Control Module ECM ECU 4993120 4993121 CM2250
$1,000.00Unit price /UnavailableJJ Engine Parts
Caterpillar C11 KCA Control Module ECM ECU 10R4094-08 225-3159 223-1236 348-2375
$1,000.00Unit price /UnavailableJJ Engine Parts
Cummins X15 EPA17 Diesel Engine Control Module ECM ECU CM2350 4384413 4384412
$1,500.00Unit price /Unavailable- Sold out
JJ Engine Parts
Detroit Series 60 14.0L Engine Control Module ECM ECU P23535798 6DD4408E07
$2,500.00Unit price /Unavailable JJ Engine Parts
Caterpillar C4.4 OEM Diesel Engine Control Module ECU ECM 286-3683-00 331-7539
$1,000.00Unit price /UnavailableJJ Engine Parts
BorgWarner Fan Clutch for Detroit DD13 DD15 Engine 1090-09600-01B 010023588
$199.99Unit price /UnavailableJJ Engine Parts
BorgWarner Fan Clutch for Detroit DD13 DD15 Engine 1090-09600-01B 010028934
$199.99Unit price /Unavailable- Sold out
JJ Engine Parts
Horton Fan Clutch for Caterpillar C15 C16 Engine 79A9313 98A9313 999313
$450.00Unit price /Unavailable - Sold out

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.