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Showing 1 - 25 of 122 Engine Control Module (ECM) Listings

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Cummins 5.9L Engine Control Module (ECM)
5 0

Cummins 5.9L Engine Control Module (ECM)

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(Core) 2018 Cummins ISB, ENGINE ECM- Part Number: 3990517, SerialNumber: 0A05021943, 2 Rectangular Plug with 50 Pins each!! Reference images for condition. For more information about this o,...
ConditionUsed
Part Number3990517
Stock NumberP-113717
MLS Number13972277
CategoryEngine Control Modules (ECM)
Last Updated11/7/2025
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 Cummins ISB5.9
2 0

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

$450 USD
Good used, cleaned, tested and inspected Cummins ISB5.9 ECM. Part number: 3990517 30 day guarantee for swap or refund if not programmable. ECM's need to be programmed to your application
Quantity2
ConditionUsed
Fits To Make(s)CUMMINS
Fits To Model(s)ISB5.9
Part Number3990517
Stock NumberRyd 3990517
MLS Number13644587
CategoryEngine Control Modules (ECM)
Last Updated11/7/2025
Location
Fitchburg, MA, US
Sold By
Rydemore Heavy Duty Truck Parts
(888) 519-___  SHOW
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Rydemore Heavy Duty Truck Parts
2007 Cummins ISB 5.9L Engine Control Module (ECM)
3 0

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)
2 0

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
(888) 595-___  SHOW
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Camions Gilbert
Cummins ISB 5.9L 24-Valve Diesel Engine CM550 Control Module ECM ECU Computer P# 3942860, P3942860
16 0

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
(844) 835-___  SHOW
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Machinery and Truck Parts
Cummins ISB 5.9L Engine Control Module (ECM)
7 0

Cummins ISB 5.9L Engine Control Module (ECM)

Contact for price
(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 Updated4/25/2025
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 CM550 ECM ECU Computer OEM P3944124 Tested Part
5 0

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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Machinery and Truck Parts
Cummins 5.9L Engine Control Module (ECM) for a Freightliner MT55 Chassis
5 0

Cummins 5.9L Engine Control Module (ECM) for a Freightliner MT55 Chassis

$199.99 USD
(Used) Cummins 5.9L, ENGINE ECM- Part Number: P3944124, Serial Number: 0C03011498, Engine Information- Displacement: 5.9L, 2 Rectangular Plug with 50 Pins each!! Reference images for...
ConditionUsed
Fits To Make(s)Freightliner
Fits To Model(s)MT55 Chassis
Part NumberP3944124
Stock NumberP-80829
MLS Number12884444
CategoryEngine Control Modules (ECM)
Last Updated5/22/2024
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
3 0

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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CRG Heavy Truck Parts
Cummins ISB 5.9L Engine Control Module (ECM) for a 2005 Freightliner MT45 Chassis
7 0

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

$599.99 USD
(Used) 2004 Cummins ISB 5.9L, ENGINE ECM- Part Number: 3965159, Serial Number: 23024670, E/C: Z90030.12, Displacement: 5.9L, Horsepower: 185, ESN: 57227137, CPL: 8136, Model: ISB CM850,...
ConditionUsed
Fits To Make(s)Freightliner
Fits To Model(s)MT45 Chassis
Will Fit Year(s)2005
Part Number3965159
Stock NumberP-42449
MLS Number11946790
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 2006 Freightliner MT45 Chassis
6 0

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

$599.99 USD
(Used) 2006 Cummins ISB 5.9L, ENGINE ECM- Part Number: 4921776, Serial Number: 26021752, ESN: 46517512, E/C: Z90030.18, Family Number: 6CEXH0359BAG, Displacement: 5.9L, Horsepower: 185,...
ConditionUsed
Fits To Make(s)Freightliner
Fits To Model(s)MT45 Chassis
Will Fit Year(s)2006
Part Number4921776
Stock NumberP-40407
MLS Number11891693
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 24-Valve Engine Control Module ECM ECU Non-Egr CM550 Part# P3990517
5 0

Cummins ISB 5.9L 24-Valve Engine Control Module ECM ECU Non-Egr CM550 Part# P3990517

$599.99 USD
(TESTED PART) FITSCUMMINS ISB 5.9L 24-Valve Diesel Engine CM550, NON-EGR Model DIESEL ENGINE, PART# P3990517,(PROGRAMMING MAY BE REQUIRED)INCLUDES WARRANTY. STOCK# 323578. MACHINERY AND...
Warranty
ConditionUsed
Assembly NumberP3990517
Engine ModelISB 5.9L 24-Valve CM550
Fits To Make(s)Cummins
Fits To Model(s)ISB 5.9L 24-Valve Non-Egr CM550
Will Fit Year(s)1998 1999 2000 2001 2002 2003
Part NumberP3990517
Stock Number323578
MLS Number12340726
CategoryEngine Control Modules (ECM)
Last Updated9/26/2023
Location
Rockwood, TN, US
Sold By
Machinery and Truck Parts
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(Tested Good) ECM Computer from Cummins CM550 ISB 5.9L 24valve Diesel Engine fits 98-03 P# P3944124
5 0

(Tested Good) ECM Computer from Cummins CM550 ISB 5.9L 24valve Diesel Engine fits 98-03 P# P3944124

$499.99 USD
ITEM DESCRIPTION, (TESTED PART) FITS CUMMINS ISB 5.9L 24-Valve Diesel Engine, NON-EGR Model DIESEL ENGINE, PART# P3944124, (PROGRAMMING MAY BE REQUIRED) INCLUDES WARRANTY. STOCK# 320326...
Warranty
Quantity5
ConditionUsed
Assembly Numberp3944124
Engine ModelISB 5.9L 24-Valve
Fits To Make(s)Cummins
Fits To Model(s)ISB 5.9L 24-Valve Non-Egr CM550
Will Fit Year(s)1998 1999 2000 2001 2002 2003
Part NumberP3944124
Stock Number320326
MLS Number11056330
CategoryEngine Control Modules (ECM)
Last Updated7/10/2023
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)
7 0

Cummins ISB 5.9L Engine Control Module (ECM)

Contact for price
(Core) 2005 Cummins ISB 5.9, ECM- Part Number: 4921776 Serial Number: 26018710 E/C: Z90030.18 Engine: ISB 5.9 Displacement: 5.9L Horsepower: 215 CPL: 8136 ESN: 46510387 For more information...
ConditionUsed
Part Number4921776
Stock NumberP-51523
MLS Number12142818
CategoryEngine Control Modules (ECM)
Last Updated7/7/2023
Location
Elkton, MD, US
Sold By
CRG Heavy Truck Parts
(844) 402-___  SHOW
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CRG Heavy Truck Parts
Cummins 5.9L ISB 24-Valve EGR-Exhaust Model Diesel Engine ECM Computer P# 4921776
5 0

Cummins 5.9L ISB 24-Valve EGR-Exhaust Model Diesel Engine ECM Computer P# 4921776

$699.99 USD
ITEM DESCRIPTION, (TESTED PART) FITS 2004-2006 CUMMINS ISB 5.9L Diesel Engine CM850, EGR MODEL EXHAUST, Cummins ECM PART# P4921776, (PROGRAMMING MAY BE REQUIRED FOR YOUR APPLICATION)...
Warranty
Quantity3
ConditionUsed
Assembly NumberP4921776
Engine ModelISB 5.9L EGR
Fits To EquipmentCummins ISB 5.9L EGR
Fits To Make(s)Cummins
Fits To Model(s)ISB 5.9L EGR
Will Fit Year(s)2004 2005 2006
Part Number4921776
Stock Number321163, 321102, 321103
MLS Number11416494
CategoryEngine Control Modules (ECM)
Last Updated11/21/2022
Location
Rockwood, TN, US
Sold By
Machinery and Truck Parts
(844) 835-___  SHOW
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Machinery and Truck Parts
2006 Cummins ISB Engine Control Module (ECM) for 2004 2005 2006 ISB 5.9L CM850 EGR-Model
4 0

2006 Cummins ISB Engine Control Module (ECM) for 2004 2005 2006 ISB 5.9L CM850 EGR-Model

$695 USD
(GOOD USED) 2006 Cummins ISB ECM Part # 4921776, CM850, EGR-Model, CPL 8136, 2004-2006 Compatible, 200 HP, Pulled off Cummins ISB 5.9L Engine, Stock #3470 | Tested Inspected! All...
ConditionUsed
CPL/ARR8136
Engine ModelISB (EGR-Model)
Fits To Make(s)Cummins
Fits To Model(s)ISB 5.9L CM850 EGR-Model
Will Fit Year(s)2004 2005 2006
Part Number4921776
Stock Number3470
MLS Number11342538
CategoryEngine Control Modules (ECM)
Last Updated4/11/2022
Location
Opa Locka, FL, US
Sold By
CA Truck Parts Inc.
(305) 688-___  SHOW
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CA Truck Parts Inc.
2006 Cummins ISB Engine Control Module (ECM) Part # 4921776 for 2004 2005 2006 ISB 5.9L EGR-Model CM850
4 0

2006 Cummins ISB Engine Control Module (ECM) Part # 4921776 for 2004 2005 2006 ISB 5.9L EGR-Model CM850

$695 USD
(GOOD USED) 2006 Cummins ISB ECM Part # 4921776, CM850, EGR-Model, CPL 8136, 2004-2006 Compatible, 200 HP, Pulled off Cummins ISB 5.9L Engine, Stock #3469 | Tested Inspected! All...
ConditionUsed
CPL/ARR8136
Horse Power200 HP
Engine ModelISB 5.9L
Fits To Make(s)Cummins
Fits To Model(s)ISB 5.9L EGR-Model CM850
Will Fit Year(s)2004 2005 2006
Part Number4921776
Stock Number3469
MLS Number11323669
CategoryEngine Control Modules (ECM)
Last Updated4/8/2022
Location
Opa Locka, FL, US
Sold By
CA Truck Parts Inc.
(305) 688-___  SHOW
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CA Truck Parts Inc.
Cummins ISB 5.9L Engine Control Module (ECM) Part # 3944124, CM550
6 0

2001 Cummins ISB 5.9L Engine Control Module (ECM) Part # 3944124, CM550

$550 USD
(GOOD USED) 2001 Cummins ISB ECM Part # 3944124 For Sale, Engine Control Module, CM550, Pulled off 2001 Cummins ISB 5.9L Diesel Engine, Serial # 0AA01004611, Stock # 2172 All...
ConditionUsed
Engine ModelISB 5.9L
Fits To EquipmentDiesel Engines
Fits To Make(s)Cummins
Fits To Model(s)ISB 5.9L CM550
Will Fit Year(s)1998 1999 2000 2001 2002 2003
Part Number3944124
Stock Number2172
MLS Number10119896
CategoryEngine Control Modules (ECM)
Last Updated3/2/2020
Location
Opa Locka, FL, US
Sold By
CA Truck Parts Inc.
(305) 688-___  SHOW
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CA Truck Parts Inc.
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