Dales Super Store - DEF Injectors / Dosing Units

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

Diesel Exhaust Fluid (DEF) injectors, integral components of Selective Catalytic Reduction (SCR) systems, are instrumental in reducing harmful nitrogen oxide (NOx) emissions from diesel engines.

Strategically positioned within the exhaust system, DEF injectors are typically located downstream of the Diesel Oxidation Catalyst (DOC) and upstream of the SCR catalyst. These electronically controlled injectors are precisely regulated by the Engine Control Unit (ECU), which relies on input from various sensors monitoring exhaust gas temperature, pressure, and NOx levels.

The primary function of DEF injectors is to deliver a precisely measured amount of DEF fluid into the exhaust stream. This fluid reacts with the NOx in the SCR catalyst, effectively converting it into harmless nitrogen, water (H2O), and carbon dioxide (CO2). NOx sensors located before and after the catalyst continuously monitor the NOx levels, ensuring optimal performance of the SCR system and compliance with emissions regulations.

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Items 1-48 of 48
Description: Direct Cross OE Numbers: 030P708, 0444043007, 0444043008, 0444043017, 0444043018, 0444043031, 0444043032, 0444043033, 0444043034, 2880112, 2880156, 2888173, 2888174, 68086408AA
Item #: 0444043017 
Condition: New
Price: $610.00
Sale: $109.95
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Description: Direct Cross OE Numbers: 0444043008, 2871878, 2871878NX
Item #: 0444043008
Condition: New
Price: $610.00
Sale: $109.95
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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 #: FI-0444043107
Condition: New
Price: $584.95
Sale: $124.95
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Save: $460.00

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Description: OE Cross: S17J0-E0020, 0444043034, A030P707
Item #: S17J0E0020
Condition: New
Price: $209.95
Sale: $159.95
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Save: $50.00

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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: $109.95
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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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Save: $185.00

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Description: OE Cross: 1408078, DDE EA1408078, DDE RA1408078, EA1408078, RA1408078, A1408078, 1404778, DDE EA1404778, DDE RA1404778, EA1404778, RA1404778, A1404778, 1407278, DDE EA1407278, DDE RA1407278,...More Details »
Item #: 1408078
Condition: New
Price: $724.95
Sale: $595.95
Save: 18%
Save: $129.00

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Description: OE Cross: 4388105, 4388105CUM, 4388105RX, 4388105RXCUM, 5506956, 5506956CUM, 5506956NX, 5506956RX, 5506956RXCUM, 5506956RXCUM, 5506956CUM
Item #: 4388105
Condition: New
Price: $799.95
Sale: $749.95
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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
Sale: $595.95
Save: 15%
Save: $104.00

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Description: OEM Cross: RA4720700555, A4720700555, 10R-046888, 0444031009, DDE RA4720700555
Item #: A4720700555
Condition: New
Price: $499.95
Sale: $395.95
Save: 21%
Save: $104.00

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Description: OEM Cross: 21143106 21089231 20996384 20805774 20996385 20920745
Item #: 21503936
Condition: New
Price: $584.95
Sale: $295.95
Save: 49%
Save: $289.00

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Description: OEM Cross: 23185531, 21534115, 21870667, 22452551
Item #: 21534115
Condition: New
Price: $235.95
Sale: $195.95
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Save: $40.00

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Description: Direct Cross OE Numbers: 22009269, 21407621
Item #: 22009269
Condition: New
Price: $290.00
Sale: $99.95
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Price: $59.95

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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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Save: $9.05

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Price: $199.95
Sale: $129.95
Save: 35%
Save: $70.00

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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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Description: OE cross reference Ford: AL3Z5J281A, AC3Z5J213C ; AC3Z5J213B ; AC3Z5J213A Dorman: 904-504
Item #: AL3Z5J281A
Condition: New
Price: $209.00
Sale: $129.95
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Save: $79.05

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Description: OE cross reference Ford: FC4Z5J281B 
Item #: FC4Z5J281B
Condition: New
Price: $209.00
Sale: $159.95
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Save: $49.05

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Description: OE Cross: 12670033, 12688993
Item #: 12688993
Condition: New
Price: $159.95

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Description: OE cross reference 12635928, 12640359, DFI2, 904435, EM1203IJ
Item #: 12647372
Condition: New
Price: $118.00
Sale: $117.95
Save: 0%
Save: $0.05

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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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Description: OE cross reference 16072EZ40A
Item #: 16072EZ40A
Condition: New
Price: $795.95
Sale: $395.95
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Save: $400.00

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Price: $215.95
Sale: $189.95
Save: 12%
Save: $26.00

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

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Description: OE Cross: RE560468
Item #: 0444043045
Condition: New
Price: $498.95
Sale: $395.95
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Save: $103.00

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Description: OE Cross: RE555626
Item #: 0444043046
Condition: New
Price: $498.95
Sale: $349.95
Save: 30%
Save: $149.00

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Description: OE Cross: 424420500, 460925600, T401183
Item #: 0444043115
Condition: New
Price: $498.95
Sale: $395.95
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Save: $103.00

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Description: Cross OE: 0444043033, 0444043008, 0444043017, 2880156, 2888173, A030P707, 2 871 878, A028Y791, 030P708, 0444043007, 0444043018, 0444043031, 0444043032, 0444043034, 2880112, 2888174, 68086408AA
Item #: 0444043033
Condition: New
Price: $610.00
Sale: $198.95
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Save: $411.05

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Price: $610.00
Sale: $609.95
Save: 0%
Save: $0.05

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Description: Cross OE: 5305254, A043C088
Item #: 0444043051
Condition: New
Price: $610.00
Sale: $549.95
Save: 10%
Save: $60.05

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Description: Cross OE: 22391565, 22391563
Item #: 0444043087
Condition: New
Price: $610.00
Sale: $289.95
Save: 52%
Save: $320.05

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Description: Cross OE: 22757148
Item #: 0444043159
Condition: New
Price: $610.00
Sale: $395.95
Save: 35%
Save: $214.05

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Description: Cross OE: S17J0E0020
Item #: 0444043072
Condition: New
Price: $610.00
Sale: $289.95
Save: 52%
Save: $320.05

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Description: Cross OE: S17J0E0011
Item #: 0444043060
Condition: New
Price: $610.00
Sale: $289.95
Save: 52%
Save: $320.05

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Description: Cross OE: 21647145
Item #: 0444023067
Condition: New
Price: $610.00
Sale: $329.95
Save: 46%
Save: $280.05

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Price: $498.95
Sale: $349.95
Save: 30%
Save: $149.00

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Description: OE Cross: 84247021, 47511724
Item #: 0444043117
Condition: New
Price: $498.95
Sale: $495.95
Save: 1%
Save: $3.00

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Description: OE Cross: 84248058, 47511725
Item #: 0444023062
Condition: New
Price: $498.95
Sale: $495.95
Save: 1%
Save: $3.00

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Description: Cross OE: 22744063
Item #: 0444043155
Condition: New
Price: $610.00
Sale: $395.00
Save: 35%
Save: $215.00

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Description: OE Cross: 47581674
Item #: 0444025027
Condition: New
Price: $498.95
Sale: $295.95
Save: 41%
Save: $203.00

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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
Save: 44%
Save: $400.05

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Description: OE Cross: A063W687, 5509448
Item #: 5509448
Condition: New
Price: $795.95

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Description: OE Cross: 4388105, 4388105CUM, 4388105RX, 4388105RXCUM, 5506956, 5506956CUM, 5506956NX, 5506956RX, 5506956RXCUM, 5506956RXCUM, 5506956CUM
Item #: 4388105
Condition: New
Price: $1,495.95


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: 4309349, 5633617, 2880277, 2881761, 2881761NX, 4309349NX
Item #: 4309349RX
Condition: New
Price: $1,895.00
Sale: $595.95
Save: 69%
Save: $1299.05

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Description: OE cross reference AL3Z5J281A 904-504
Item #: AL3Z5J281A
Condition: New
Price: $295.00
Sale: $294.95
Save: 0%
Save: $0.05

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Items 1-48 of 48

More About DEF Injectors / Dosing Units

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

The injectors ensure accurate and efficient DEF delivery into the exhaust system, maintaining optimal conditions for the SCR catalyst to function effectively. Precise operation of the injectors is crucial 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.