Dales Super Store - DEF Injectors / Dosing Units

Diesel Exhaust Fluid (DEF) System - DEF Injectors / Dosing Units

DEF injectors, also known as Diesel Exhaust Fluid injectors, are critical components in vehicles equipped with Selective Catalytic Reduction (SCR) systems. DEF injectors play a key role in the reduction of harmful nitrogen oxide (NOx) emissions produced by diesel engines.

These injectors are typically located downstream of the diesel oxidation catalyst (DOC) and upstream of the SCR catalyst. They are electronically controlled and regulated by the engine control unit (ECU) based on input from various sensors monitoring exhaust gas temperature, pressure, and NOx levels.

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Description: OEM Cross: 4377650, 5578983, CMI2520184C1, CMI2520184C2, 5472967, 5578983RX
Item #: 5578983
Condition: New
Price: $784.95
Sale: $599.95
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Description: OE CROSS-REFERENCE: 4309349, 5633617, 2880277, 2881761, 2881761NX, 4309349NX
Item #: 4309349
Condition: New
Price: $1,895.00
Sale: $595.95
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Description: Direct Cross OE Numbers: 030P708, 0444043007, 0444043008, 0444043017, 0444043018, 0444043031, 0444043032, 0444043033, 0444043034, 2880112, 2880156, 2888173, 2888174, 68086408AA
Item #: 030P708
Condition: New
Price: $610.00
Sale: $195.95
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Description: Direct Cross OE Numbers: 0444043008, 2871878, 2871878NX
Item #: 2871878
Condition: New
Price: $610.00
Sale: $195.95
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Description: Direct Cross OE Numbers: 030707, 0444043008, 0444043018, 0444043031, 0444043033, 0444043034, 098644F286, 1819798, 1819798PE, 2511446C1, 2871878, 2871878NX, 2880156, 2880156NX, 2880156RX,...More Details »
Item #: A030P707
Condition: New
Price: $610.00
Sale: $125.95
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Save: $484.05

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Description: OEM Cross: 0444043107, 0444043108, 098644D286, 1819798, 1819798PE, 1819798PEX, 1975291, 2511446C1, 2871878, 2871878CUM, 2871878NX, 2871878RX, 2880156, 2880156NX, 2880156RX, 2888112, 2888112NX,...More Details »
Item #: 0444043107
Condition: New
Price: $584.95
Sale: $295.95
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Description: OEM Cross: 21143106 21089231 20996384 20805774 20996385 20920745
Item #: 21503936
Condition: New
Price: $584.95

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Description: Direct Cross OE Numbers: 22009269, 21407621
Item #: 22009269
Condition: New
Price: $290.00
Sale: $119.95
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Save: $170.05

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Description: Direct Cross OE Numbers: Paccar: 1819798, 1819798PE Volvo: 21575532, 22391563, 22391565, 22391567, 21243945, 21332704, 21332711, 21577030 Cummins: 2888112, 2888114, 2888173, 5305254,...More Details »
Item #: 21575532
Condition: New
Price: $199.95
Sale: $195.95
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Description: OE cross reference 0444021036, 12635928, 12647372, 12656061, 55573939, DFI1008
Item #: 12635928
Condition: New
Price: $104.95

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Price: $215.95
Sale: $189.95
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Save: $26.00

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Description: OE cross reference 12635928, 12640359, DFI2, 904435, EM1203IJ
Item #: 12647372
Condition: New
Price: $118.00
Sale: $117.95
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Description: OE cross reference Ford: AL3Z5J281A, AC3Z5J213C ; AC3Z5J213B ; AC3Z5J213A Dorman: 904-504
Item #: AL3Z-5J281-A
Condition: New
Price: $209.00
Sale: $159.95
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Description: OE cross reference Ford: FC4Z5J281B 
Item #: FC4Z5J281B
Condition: New
Price: $209.00
Sale: $159.95
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Description: OE cross reference S17J0-E0020, 0444043034, A030P707
Item #: S17J0-E0020
Condition: New
Price: $209.95
Sale: $159.95
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Save: $50.00

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Description: OE cross reference 16072EZ40A
Item #: 16072EZ40A
Condition: New
Price: $795.95
Sale: $495.95
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Save: $300.00

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Description: OE cross reference 4627241AA, 4627241AB, 4627241AD, 4627241AE, 4627241AF
Item #: 4627241AF
Condition: New
Price: $209.00
Sale: $159.95
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Price: $199.95
Sale: $179.95
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Description: OE Cross: 0 444 043 059, 0444043059, 0-444-043-059, 30063000015. 300630-00015, 7248682, 7248682REM
Item #: 0444043059
Condition: New
Price: $900.00
Sale: $499.95
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Save: $400.05

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Description: OE cross reference 4627710AA, 4627710AB, 4627710AC, 68155791AA, 68155791AB, 68155791AC, 68167878AA, 68186710AA, 68186710AB, 68186710AC, 68232842AA, 68232842AB, 68232842AC, 68232842AD
Item #: 68232842AD
Condition: New
Price: $144.00
Sale: $134.95
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Description: OE Cross Reference: 4388105, 4388105CUM, 4388105RX, 4388105RXCUM, 5506956, 5506956CUM, 5506956NX, 5506956RX, 5506956RXCUM, 5506956RXCUM, 5506956CUM
Item #: 4388105
Condition: New
Price: $799.95

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Description: OEM Cross: 1402478, DDE EA1402478, DDE RA1402478, EA1402478, RA1402478, A1402478, 1404378, DDE EA1404378, DDE RA1404378, EA1404378, RA1404378, A1404378, DDE EA0001402478, EA0001402478,...More Details »
Item #: A0001402478
Condition: New
Price: $699.95

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Description: OEM Cross: RA4720700555, A4720700555, 10R-046888, 0444031009, DDE RA4720700555
Item #: A4720700555
Condition: New
Price: $499.95

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Description: OE Cross Reference: 1408078, DDE EA1408078, DDE RA1408078, EA1408078, RA1408078, A1408078, 1404778, DDE EA1404778, DDE RA1404778, EA1404778, RA1404778, A1404778, 1407278, DDE EA1407278, DDE...More Details »
Item #: 1408078
Condition: New
Price: $724.95

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Description: OEM Reference #: 12641278, 12717296
Item #: 12641278
Condition: New
Price: $267.95

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Price: $39.95
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Description: OEM Cross: 23185531, 21534115, 21870667, 22452551
Item #: 21534115
Condition: New
Price: $235.95

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Description: OEM Cross: 4377650, 5578983, CMI2520184C1, CMI2520184C2, 5472967, 5578983RX, A050S599
Item #: 5578983
Condition: New
Price: $784.95
Sale: $749.95
Save: 4%
Save: $35.00

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Description: OE cross reference AL3Z5J281A 904-504
Item #: AL3Z5J281A
Condition: New
Price: $295.00
Sale: $294.95
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Save: $0.05

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Items 1-29 of 29

More About DEF Injectors / Dosing Units

DEF, or AdBlue, is a urea-based solution that is injected into the exhaust stream before it enters the SCR catalyst. DEF injectors precisely spray the DEF into the exhaust gases, allowing for the conversion of harmful NOx emissions into harmless nitrogen and water vapor through a chemical reaction within the catalyst.

The DEF injectors ensure the accurate and efficient delivery of DEF into the exhaust system, maintaining the optimal conditions for the SCR catalyst to function effectively. The injectors must operate with precision to provide the correct amount of DEF in proportion to the exhaust gas flow, allowing for complete NOx reduction while minimizing DEF consumption.

Regular maintenance and cleaning of DEF injectors are essential to prevent blockages or malfunctions that could hinder the proper injection of DEF. Clogged or faulty injectors can lead to incomplete NOx conversion, increased emissions, and potential engine performance issues.