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

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Showing 26 - 47 of 47 Engine Control Module (ECM) Listings

26 - 47 of 47 listings
26 - 47 of 47 listings
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

$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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Rydemore Heavy Duty Truck Parts
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 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
(844) 835-___  SHOW
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Machinery and Truck Parts
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)

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

(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
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Cummins ISB 5.9L Engine Control Module (ECM) for EPA04

Cummins ISB 5.9L Engine Control Module (ECM) for EPA04

$750 USD
(GOOD USED/ TESTED) Cummins ISB, EPA04, Diesel Engine Control Module, ECM, ECU, for sale!!!!Part #: 4921776; Service Model Name: CM850; Stock #: E2920 For more information about this listing...
ConditionUsed
Fits To Model(s)EPA04
Part Number4921776
Stock NumberE2920
MLS Number11577026
CategoryEngine Control Modules (ECM)
Last Updated9/2/2022
Location
Hialeah, FL, US
Sold By
JJ Rebuilders Inc.
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2006 Cummins ISB 5.9L Engine Control Module (ECM) Part # 4921776 for 2004 2005 2006 ISB EGR-Model CM850 Diesel Engines

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

$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 # 3480 | Tested Inspected! All...
ConditionUsed
CPL/ARR8136
Fits To EquipmentDiesel Engines
Fits To Make(s)Cummins
Fits To Model(s)ISB EGR-Model CM850
Will Fit Year(s)2004 2005 2006
Part Number4921776
Stock Number3480
MLS Number11355918
CategoryEngine Control Modules (ECM)
Last Updated4/21/2022
Location
Opa Locka, FL, US
Sold By
CA Truck Parts Inc.
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2006 Cummins ISB 5.9L Engine Control Module (ECM) for CM850

2006 Cummins ISB 5.9L Engine Control Module (ECM) for CM850

$750 USD
(GOOD USED) OEM 2006 Cummins ISB 5.9 Engine Control Module, ECM, ECU, for sale!!!!, P/N: 4921776, CM850, 300HP, Stock #: E1977 For more information about this listing, shipping,...
ConditionUsed
Fits To Model(s)CM850
Part Number4921776
Stock NumberE1977
MLS Number10295409
CategoryEngine Control Modules (ECM)
Last Updated7/22/2020
Location
Hialeah, FL, US
Sold By
JJ Rebuilders Inc.
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2005 Cummins ISB 5.9L Engine Control Module (ECM) for CM850

2005 Cummins ISB 5.9L Engine Control Module (ECM) for CM850

$750 USD
(GOOD USED) 2005 Cummins ISB 5.9 Engine Computer Module, ECM, ECU, for sale!!!!, P/N: 3965159, CM850, CPL8136, 215HP, Stock #: E1882 For more information about this listing, shipping,...
ConditionUsed
CPL/ARR8136
Horse Power215 HP
Engine ModelISB
Fits To Model(s)CM850
Part Number3965159
Stock NumberE1882
MLS Number10168427
CategoryEngine Control Modules (ECM)
Last Updated4/14/2020
Location
Hialeah, FL, US
Sold By
JJ Rebuilders Inc.
(844) 385-___  SHOW
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Cummins ISB 5.9L Engine Control Module (ECM) Part # 3944124, CM550

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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2006 Cummins ISB 5.9L Engine Control Module (ECM)

2006 Cummins ISB 5.9L Engine Control Module (ECM)

$750 USD
(USED) 2006 Cummins ISB 5.9 Diesel Engine Computer Module, ECM, ECU, for sale!!!!, P/N: 4921797, 4921776, CM850, 245HP, CPL8135, Stock #: E1839 For more information about this...
ConditionUsed
CPL/ARR8135
Part Number4921776
Stock NumberE1839
MLS Number10077393
CategoryEngine Control Modules (ECM)
Last Updated2/6/2020
Location
Hialeah, FL, US
Sold By
JJ Rebuilders Inc.
(844) 385-___  SHOW
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JJ Rebuilders Inc.
2006 Cummins ISB 5.9L ECM, P/N 4921776 Engine Computer

2006 Cummins ISB 5.9L ECM, P/N 4921776 Engine Computer

$695 USD
(GOOD USED/TESTED) 2006 Cummins ISB 5.9L ECM Part # 4921776, EGR-Model, Engine Control Module, Engine Computer, ISB, ECM Serial # A37218082, Pulled of a 2006 Cummins Remanufactured in 2016,...
ConditionUsed
Part Number4921776
Stock NumberECM0151
MLS Number9486297
CategoryEngine Control Modules (ECM)
Last Updated8/24/2018
Location
Opa Locka, FL, US
Sold By
CA Truck Parts Inc.
(305) 688-___  SHOW
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CA Truck Parts Inc.
2005 Cummins ISB 5.9L Engine Control Module (ECM) for CM850

2005 Cummins ISB 5.9L Engine Control Module (ECM) for CM850

$750 USD
(GOOD USED/ TESTED) Cummins ISB, EPA04, Diesel Engine Control Module, ECM, ECU, for sale!!!!Part #: 4921776; Service Model Name: CM850; Stock #: E2920 For more information about this listing...
ConditionUsed
Fits To Model(s)CM850
Part Number4921776
Stock NumberE2920
MLS Number11576653
CategoryEngine Control Modules (ECM)
Last Updated9/2/2022
Location
Hialeah, FL, US
Sold By
JJ Rebuilders Inc.
(844) 385-___  SHOW
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JJ Rebuilders Inc.
2006 Cummins ISB 5.9L Engine Control Module (ECM) for CM850

2006 Cummins ISB 5.9L Engine Control Module (ECM) for CM850

$750 USD
(GOOD USED) 2006 Cummins ISB 5.9 Diesel Engine Control Module, ECM, ECU, for sale!!!!!, P/N: 3965159RX, CM850, Stock #: E2081 For more information about this listing, shipping, technical...
ConditionUsed
Fits To Model(s)CM850
Part Number3965159-RX
Stock NumberE2081
MLS Number10521572
CategoryEngine Control Modules (ECM)
Last Updated11/6/2020
Location
Hialeah, FL, US
Sold By
JJ Rebuilders Inc.
(844) 385-___  SHOW
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JJ Rebuilders Inc.
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