- Sold out
JJ Engine Parts
Caterpillar Water Temperature Regulator Housing Thermostat Housing 150-8002
$40.00Unit price /Unavailable - Sold out
JJ Engine Parts
OEM Cummins ISX15 Diesel Engine Wiring Harness 3686749 4312327
$650.00Unit price /Unavailable - Sold out
JJ Engine Parts
Transtron Control Module, ECM for Isuzu 4JJ1 4HK1 Engine 8982995492, 8983627500
$1,000.00Unit price /Unavailable - Sold out
JJ Engine Parts
Allison 3000 HS Transmission Control Module 29558098 28525612
$950.00Unit price /Unavailable JJ Engine Parts
Eaton Fuller FM-14E310B-LAS 10 Speed Automated Transmission TCM ETC2008A02
$799.99Unit price /UnavailableJJ Engine Parts
2012 Freightliner Cascadia LH Aluminum Fuel Tank 379L
$450.00Unit price /UnavailableJJ Engine Parts
Eaton Fuller FM-14E310B-LAS 10 Speed Automated Manual Transmission
$2,000.00Unit price /UnavailableJJ Engine Parts
Horton Fan Clutch for Mercedes Benz OM460LA Engine 799843 989843
$300.00Unit price /UnavailableJJ Engine Parts
International Rear Engine Motor Mount Equipped with Caterpillar Engine 3559607C3
$75.00Unit price /UnavailableJJ Engine Parts
Trackunit M7MG Telematics GPS Cellular Tracking Module 113663
$50.00Unit price /UnavailableJJ Engine Parts
Detroit DD13 EPA17 Diesel Engine Control Module ECM ECU A0014465835
$800.00Unit price /Unavailable- Sold out
JJ Engine Parts
Detroit DD13 EPA17 Diesel Engine Control Module ECM ECU A0014465835
$800.00Unit price /Unavailable JJ Engine Parts
QP7H15 A/C Compressor TCCI Sanden QP4418S 3582435C3
$150.00Unit price /UnavailableJJ Engine Parts
International DT466E OEM Diesel Engine Fuel Filter Base 1841327C96
$450.00Unit price /UnavailableJJ Engine Parts
ZF Astronic Automated Manual Transmission 10AS2310B
$2,000.00Unit price /UnavailableJJ Engine Parts
Paccar PX-8 Cummins ISC8.3 Engine 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.