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Cummins ISB 5.9L Engine Control Modules (ECM) For Sale

Browse Cummins ISB 5.9L Engine Control Modules (ECM) for sale on MyLittleSalesman.com. Compare prices, photos, and seller details across 48 listings. Cummins ISB 5.9L Engine Control Module (ECM) pricing ranges from $200 to $1,200 based on recent marketplace data. Filter by condition, price, or year to find the right Cummins ISB 5.9L Engine Control Module (ECM).
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Showing 1 - 25 of 48 Engine Control Module (ECM) Listings

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Cummins ISB 5.9L Engine Control Module (ECM) for a Cummins ISBCR5.9

Cummins ISB 5.9L Engine Control Module (ECM) for a Cummins ISBCR5.9

Recently Updated
$500 USD
Good used, cleaned, tested and inspected Cummins ISB5.9 ECM. Part Number: 4921776. 30 Day Guarantee for swap or refund if not programmable. ECM's need to be programmed for your application.
Quantity3
ConditionUsed
Fits To Make(s)CUMMINS
Fits To Model(s)ISBCR5.9
Part Number4921776
Stock NumberRyd 4921776
MLS Number10205076
CategoryEngine Control Modules (ECM)
Last Updated4/14/2026
Location
Fitchburg, MA, US
Sold By
Rydemore Heavy Duty Truck Parts
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Rydemore Heavy Duty Truck Parts
Cummins ISB 5.9L Engine Control Module (ECM) for a Cummins ISB5.9

Cummins ISB 5.9L Engine Control Module (ECM) for a Cummins ISB5.9

$500 USD
Good used, cleaned, tested and inspected Cummins ISB5.9 ECM. Part Number: 3944124, 3945868, 3990517. 30 Day Guarantee for swap or refund if not programmable. ECM's need to be programmed for...
Quantity2
ConditionUsed
Fits To Make(s)CUMMINS
Fits To Model(s)ISB5.9
Part Number3944124
Stock NumberRyd 3944124
MLS Number10205094
CategoryEngine Control Modules (ECM)
Last Updated3/10/2026
Location
Fitchburg, MA, US
Sold By
Rydemore Heavy Duty Truck Parts
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Rydemore Heavy Duty Truck Parts
Cummins ISB 5.9L Engine Control Module (ECM) for a Cummins ISBCR5.9

Cummins ISB 5.9L Engine Control Module (ECM) for a Cummins ISBCR5.9

$200 USD
Good used, cleaned and inspected Cummins ISBCR5.9 ECM cooling plate. Part number: 3955039.
Quantity3
ConditionUsed
Fits To Make(s)CUMMINS
Fits To Model(s)ISBCR5.9
Part Number3955039
Stock NumberRyd 3955039
MLS Number14110963
CategoryEngine Control Modules (ECM)
Last Updated1/27/2026
Location
Fitchburg, MA, US
Sold By
Rydemore Heavy Duty Truck Parts
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Cummins IB5.9 Engine Computer Module, ECM, ECU 4921797 4921776 CM850

Cummins IB5.9 Engine Computer Module, ECM, ECU 4921797 4921776 CM850

$750 USD
(GOOD USED/ TESTED) Cummins ISB5.9 OEM Engine Computer Module, ECM, ECU, for sale!!!! P/N: 4921776; Supersession Part #: 4941797; Service Model Name: CM850; Stock #: E4358 For more...
ConditionUsed
Part Number4921797
Stock NumberE4358
MLS Number14000741
CategoryEngine Control Modules (ECM)
Last Updated11/25/2025
Location
Hialeah, FL, US
Sold By
JJ Rebuilders Inc.
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JJ Rebuilders Inc.
2007 Cummins ISB 5.9L Engine Control Module (ECM)

2007 Cummins ISB 5.9L Engine Control Module (ECM)

$450 USD
This is a used ISB 260 Cummins 5.9L engine computer. This will fit several years in models, however please match the part number to ensure an exact fit. The part number is 4921776. This is a...
ConditionUsed
Part Number4921776
Stock Number25242
MLS Number13885298
CategoryEngine Control Modules (ECM)
Last Updated10/15/2025
Location
Spartanburg, SC, US
Sold By
Tony's Truck Parts
(877) 350-___  SHOW
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Tony's Truck Parts
Cummins ISB 5.9L Engine Control Module (ECM)

Cummins ISB 5.9L Engine Control Module (ECM)

$1,200 USD
Nous livrons partout au Canada et États-Unis. We ship anywhere in Canada USA. - Cummins ISB 5.9 Engine Control Module - P/N 3942860 - Stock: 2860ECM - CORE REFUND : 200$, Serial#: Other...
ConditionUsed
Part Number3942860
Stock Number2860ECM
MLS Number13709051
CategoryEngine Control Modules (ECM)
Last Updated7/18/2025
Location
Beauceville, QC, Canada
Sold By
Camions Gilbert
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Camions Gilbert
Cummins ISB 5.9L 24-Valve Diesel Engine CM550 Control Module ECM ECU Computer P# 3942860, P3942860

Cummins ISB 5.9L 24-Valve Diesel Engine CM550 Control Module ECM ECU Computer P# 3942860, P3942860

$499.99 USD
ITEM DESCRIPTION, (TESTED PART) FITS 1998 CUMMINS ISC 5.9L 24-VALVE Diesel Engine, NON-EGR Model (PROGRAMMING MAY BE REQUIRED) PART# P3942860, GUARANTEED TO BE PROGRAMMABLE AND INCLUDES...
Warranty
Quantity2
ConditionUsed
CPL/ARR2232
Engine ModelISB 5.9L 24-Valve Inline 6 Turbocharged Diesel Engine
Fits To EquipmentCummins 5.9L 24-Valve Diesel Engine CM550 ECM ECU ICM Computer Control Module
Fits To Make(s)Cummins
Fits To Model(s)ISB 5.9L 24-Valve Non-Egr CM550
Will Fit Year(s)1998 - 2003
Part Number3942860
Stock Number321715, 321776
MLS Number11734144
CategoryEngine Control Modules (ECM)
Last Updated5/5/2025
Location
Rockwood, TN, US
Sold By
Machinery and Truck Parts
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Cummins ISB 5.9L Engine Control Module (ECM)

Cummins ISB 5.9L Engine Control Module (ECM)

$599.98 USD
(Used) Cummins ISB 5.9, ENGINE ECM- CM: CM850, Part Number: 4921776, Engine information- Displacement: 5.9L, 1 Rectangular Plug with 4 Pins, 1 Rectangular Plug with 60 Pins, 1 Rectangular...
ConditionUsed
Part Number4921776,
Stock NumberP-100941
MLS Number13539578
CategoryEngine Control Modules (ECM)
Last Updated3/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
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Cummins ISB 5.9L CM550 ECM ECU Computer OEM P3944124 Tested Part

Cummins ISB 5.9L CM550 ECM ECU Computer OEM P3944124 Tested Part

$349.99 USD
ECM SPECIFICS Condition: GOOD - Tested with Warranty, Price USD: $349 (NO CORE), Make: CUMMINS DIESEL ENGINE, Part#: P3944124 CM550, Stock#: 324742 For more...
Warranty
ConditionUsed
Assembly NumberP3944124
Engine ModelISB 5.9L 24-Valve Inline 6 Turbocharged Diesel Engine
Fits To EquipmentCummins ISB 5.9L ECM Computer P3944124 CM550
Fits To Make(s)Cummins ISB 5.9L CM550 ECM ECU Computer P3944124
Fits To Model(s)ISB 5.9L 24-Valve Non-EGR P3944124
Part NumberP3944124
Stock Number324743
MLS Number13326956
CategoryEngine Control Modules (ECM)
Last Updated1/14/2025
Location
Rockwood, TN, US
Sold By
Machinery and Truck Parts
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Cummins ISB 5.9L Engine Control Module (ECM) for a 2006 Freightliner MT45 Chassis

Cummins ISB 5.9L Engine Control Module (ECM) for a 2006 Freightliner MT45 Chassis

$599.98 USD
(Used) 2005 Cummins ISB 5.9, ENGINE ECM- CM: CM850, Part Number: 4921776, Serial Number: 26021803, E/C: Z90030.18, Engine information- Serial Number: 46517562, Displacement: 5.9L, 1...
ConditionUsed
Fits To Make(s)Freightliner
Fits To Model(s)MT45 Chassis
Will Fit Year(s)2006
Part Number4921776
Stock NumberP-95205
MLS Number13326526
CategoryEngine Control Modules (ECM)
Last Updated3/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
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Cummins ISB 5.9L Engine Control Module (ECM) for a 2006 Freightliner MT45 Chassis

Cummins ISB 5.9L Engine Control Module (ECM) for a 2006 Freightliner MT45 Chassis

$599.98 USD
(Used) 2006 Cummins ISB, ENGINE ECM- Part Number: 4921776 Serial Number: 37024497, ECM CODE: Z90005. 30 Engine information- Family Number: 6CEXH0359BAG, Serial Number: 60271684 2 Plugs with...
ConditionUsed
Fits To Make(s)Freightliner
Fits To Model(s)MT45 Chassis
Will Fit Year(s)2006
Part Number4921776
Stock NumberP-95002
MLS Number13321077
CategoryEngine Control Modules (ECM)
Last Updated3/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
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Cummins ISB 5.9L Engine Control Module (ECM) for a 2006 Freightliner MT45 Chassis

Cummins ISB 5.9L Engine Control Module (ECM) for a 2006 Freightliner MT45 Chassis

$599.98 USD
(Used) 2005 Cummins ISB 5.9, ENGINE ECM- CM: CM850, Part Number: 4921776, Serial Number: 26021771, E/C: Z90030.18, Engine information- Serial Number: 46517574, Displacement: 5.9L, 1...
ConditionUsed
Fits To Make(s)Freightliner
Fits To Model(s)MT45 Chassis
Will Fit Year(s)2006
Part Number4921776
Stock NumberP-94498
MLS Number13307107
CategoryEngine Control Modules (ECM)
Last Updated3/13/2026
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
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Cummins ISB 5.9L Engine Control Module (ECM)

Cummins ISB 5.9L Engine Control Module (ECM)

$750 USD
(GOOD USED/ TESTED) OEM Cummins ISB Diesel Engine Control Module, ECM, ECU, for sale!!!!!! Part #: 4921776; Service Model Name: CM850; Stock #: E3833 For more information about this listing,...
ConditionUsed
Part Number4921776
Stock NumberE3833
MLS Number12968985
CategoryEngine Control Modules (ECM)
Last Updated7/3/2024
Location
Hialeah, FL, US
Sold By
JJ Rebuilders Inc.
(844) 385-___  SHOW
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JJ Rebuilders Inc.
Cummins ISB 5.9L Engine Control Module (ECM) for a 2007 Freightliner MT45 Chassis

Cummins ISB 5.9L Engine Control Module (ECM) for a 2007 Freightliner MT45 Chassis

$699.99 USD
(Used) 2006 Cummins ISB 5.9, ENGINE ECM- Serial Number: A35000730, Part Number: P4921776-RX, DC: 1931, Engine information- Displacement: 5.9L, Serial Number: 60285931, Part Number 4018419,...
ConditionUsed
Fits To Make(s)Freightliner
Fits To Model(s)MT45 Chassis
Will Fit Year(s)2007
Part NumberP4921776-RX
Stock NumberP-48323
MLS Number12073968
CategoryEngine Control Modules (ECM)
Last Updated5/24/2024
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
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Cummins ISB 5.9L Engine Control Module (ECM) for a 2006 Freightliner MT45 Chassis

Cummins ISB 5.9L Engine Control Module (ECM) for a 2006 Freightliner MT45 Chassis

$599.99 USD
(Used) 2005 Cummins ISB 5.9, ENGINE ECM- Serial Number: 34136443, Part Number: 4921776, ECM Code: 790005.30, Engine information- Family Number: 6CEXH0359BAG, Displacement: 5.9L, Horsepower:...
ConditionUsed
Fits To Make(s)Freightliner
Fits To Model(s)MT45 Chassis
Will Fit Year(s)2006
Part Number4921776
Stock NumberP-46028
MLS Number12013614
CategoryEngine Control Modules (ECM)
Last Updated5/24/2024
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
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(GOOD USED) Cummins Engine Control Module (ECM) for ISB 5.9L 24-Valve Non-EGR Part# 3944124, P3944124

(GOOD USED) Cummins Engine Control Module (ECM) for ISB 5.9L 24-Valve Non-EGR Part# 3944124, P3944124

$499.99 USD
MACHINERY AND TRUCK PARTS ITEM DESCRIPTION, (TESTED PART) FITSCUMMINS ISB 5.9L 24-Valve Diesel Engine, NON-EGR Model DIESEL ENGINE, PART# 3944124,(PROGRAMMING MAY BE REQUIRED)INCLUDES...
Warranty
ConditionUsed
Engine ModelISB 5.9L 24-Valve Inline 6 Turbocharged Diesel Engine
Fits To Make(s)Cummins
Fits To Model(s)ISB 5.9L 24-Valve Non-EGR
Part Number3944124
Stock Number321085
MLS Number12620805
CategoryEngine Control Modules (ECM)
Last Updated2/7/2024
Location
Rockwood, TN, US
Sold By
Machinery and Truck Parts
(844) 835-___  SHOW
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Machinery and Truck Parts
Cummins ISB 5.9L Engine Control Module (ECM) for a 2007 Freightliner MT45 Chassis

Cummins ISB 5.9L Engine Control Module (ECM) for a 2007 Freightliner MT45 Chassis

$599.99 USD
(Used) 2006 Cummins ISB 5.9, ENGINE ECM- Serial Number: 37014456, Part Number: 4921776, E/C: Z90030.23, Family Number: 6CEXH0359BAG, Displacement: 5.9L, Horsepower: 185, CPL: 8136, Serial...
ConditionUsed
Fits To Make(s)Freightliner
Fits To Model(s)MT45 Chassis
Will Fit Year(s)2007
Part Number4921776
Stock NumberP-49841
MLS Number12103887
CategoryEngine Control Modules (ECM)
Last Updated12/18/2023
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
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CRG Heavy Truck Parts
Cummins ISB 5.9L Engine Control Module (ECM) for a 2007 Freightliner MT45 Chassis

Cummins ISB 5.9L Engine Control Module (ECM) for a 2007 Freightliner MT45 Chassis

$599.99 USD
(Used) 2006 Cummins ISB 5.9L, ENGINE ECM- Serial Number: 31016315, Part Number: 4921776, E/C: Z90030.23, Family Number: 6CEXH0359BAG, Displacement: 5.9L, Horsepower: 185, CPL: 8136, ESN:...
ConditionUsed
Fits To Make(s)Freightliner
Fits To Model(s)MT45 Chassis
Will Fit Year(s)2007
Part Number4921776
Stock NumberP-49838
MLS Number12103884
CategoryEngine Control Modules (ECM)
Last Updated12/18/2023
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
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Cummins ISB 5.9L Engine Control Module (ECM) for a 2005 Freightliner MT45 Chassis

Cummins ISB 5.9L Engine Control Module (ECM) for a 2005 Freightliner MT45 Chassis

$599.99 USD
(Used) 2004 Cummins ISB 5.9, ENGINE ECM- Serial Number: 23021632, Part Number: 3965159, E/C: Z90030.12, Family Number: 4CEXH0359BAG, Displacement: 5.9L, Horsepower: 185, Ar.No./CPL: 8136,...
ConditionUsed
Fits To Make(s)Freightliner
Fits To Model(s)MT45 Chassis
Will Fit Year(s)2005
Part Number3965159
Stock NumberP-49529
MLS Number12094584
CategoryEngine Control Modules (ECM)
Last Updated12/18/2023
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
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CRG Heavy Truck Parts
Cummins ISB 5.9L Engine Control Module (ECM) for a 2007 Freightliner MT45 Chassis

Cummins ISB 5.9L Engine Control Module (ECM) for a 2007 Freightliner MT45 Chassis

$599.99 USD
(Used) 2006 Cummins ISB 5.9, ENGINE ECM- Serial Number: 29041061, Part Number: 4921776, E/C: Z90030.18, Family Number: 6CEXH0359BAG, Displacement: 5.9L, Horsepower: 185, Ar.No./CPL: 8136,...
ConditionUsed
Fits To Make(s)Freightliner
Fits To Model(s)MT45 Chassis
Will Fit Year(s)2007
Part Number4921776
Stock NumberP-49528
MLS Number12094583
CategoryEngine Control Modules (ECM)
Last Updated12/18/2023
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
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CRG Heavy Truck Parts
Cummins ISB 5.9L Engine Control Module (ECM) for a 2007 Freightliner MT45 Chassis

Cummins ISB 5.9L Engine Control Module (ECM) for a 2007 Freightliner MT45 Chassis

$599.99 USD
(Used) 2006 Cummins ISB 5.9, ENGINE ECM- Serial Number: 30002970, Part Number: 4921776, E/C: Z90030.18, Family Number: 6CEXH0359BAG, Displacement: 5.9L, Horsepower: 185, Ar.No./CPL: 8136,...
ConditionUsed
Fits To Make(s)Freightliner
Fits To Model(s)MT45 Chassis
Will Fit Year(s)2007
Part Number4921776
Stock NumberP-48472
MLS Number12074112
CategoryEngine Control Modules (ECM)
Last Updated12/18/2023
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
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CRG Heavy Truck Parts
Cummins ISB 5.9L Engine Control Module (ECM) for a 2007 Freightliner MT45 Chassis

Cummins ISB 5.9L Engine Control Module (ECM) for a 2007 Freightliner MT45 Chassis

$599.99 USD
(Used) 2006 Cummins ISB 5.9, ENGINE ECM- Serial Number: 29042748, Part Number: 4921776, E/C: Z90030.18, Engine Information- Family Number: 6CEXH0359BAG, Displacement: 5.9L, Horsepower: 185,...
ConditionUsed
Fits To Make(s)Freightliner
Fits To Model(s)MT45 Chassis
Will Fit Year(s)2007
Part Number4921776
Stock NumberP-48471
MLS Number12074111
CategoryEngine Control Modules (ECM)
Last Updated1/29/2024
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
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