- Sold out
JJ Engine Parts
Mack MP8 OEM Diesel Engine Control Module OEM ECM ECU 21358126
$2,000.00Unit price /Unavailable JJ Engine Parts
International DT466E Control Module ECM 1839368C3 1845117C4
$800.00Unit price /UnavailableJJ Engine Parts
International Maxxforce 9 OEM Engine Control Module ECM ECU 7091546C92
$2,500.00Unit price /UnavailableJJ Engine Parts
International OEM Turn Signal Switch 4057712C4 K125858
$80.00Unit price /UnavailableJJ Engine Parts
Detroit DD15 OEM Diesel Engine Control Module ECM ECU A0024460935
$800.00Unit price /Unavailable- Sold out
JJ Engine Parts
Freightliner Cascadia SAM Chassis Module A06-75982-000
$350.00Unit price /Unavailable JJ Engine Parts
Allison B500RM 4th GEN Automatic Transmission 9420012268 29537725
$0.00Unit price /UnavailableJJ Engine Parts
Allison 3000RM Automatic Transmission 9330022802 29537726
$2,000.00Unit price /UnavailableJJ Engine Parts
Paccar MX-13 OEM Engine Control Module ECM ECU 2298833 2037394 2160700 2295122
$2,000.00Unit price /UnavailableJJ Engine Parts
Cummins ISM OEM Engine Control Module ECM ECU 3103533 CM875
$1,500.00Unit price /Unavailable- Sold out
JJ Engine Parts
Cummins ISB 5.9 Control Module ECM ECU 3990517 3944124 3944868 CM550
$1,000.00Unit price /Unavailable JJ Engine Parts
Cummins OEM QSB Diesel Engine Control Module ECM ECU OEM 4921776 4921797 CM850
$750.00Unit price /Unavailable- Sold out
JJ Engine Parts
Mack AMI OEM Diesel Engine Control Module ECM ECU 12MS530M
$600.00Unit price /Unavailable JJ Engine Parts
Cummins ISX15 OEM Engine Control Module ECM ECU 5317106 5317107 CM2350
$1,000.00Unit price /UnavailableJJ Engine Parts
Cummins ISX15 QSX15 OEM Fuel Accumulator Fuel Rail 4307128
$250.00Unit price /Unavailable- Sold out
JJ Engine Parts
Sam Chassis Control Module for Freightliner Cascadia Fuse Box A06-60971-012
$350.00Unit 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.