Sensor guide
DEF Injectors: The 32-Entry Family by OE Number
The family and its names
The injector family of this catalogue holds 32 entries. The names DEF injector, doser injector, urea injector and urea nozzle all land on this one family; the comparison page on this site walks the naming in detail, and the OE number is the meeting point every name resolves to. Three groups of entries are deep-checked and are walked below: a cross-referenced set headed 0444023019, the Cummins injector 2871878, and the Iveco injector 0444023058. The remaining entries are listed by number in the family listing, and any number can be sent for a check against its entry.
One entry, many numbers
The entry headed 0444023019 carries a long reference string: 0444023019 itself, then 0444028008, 0444023048, 0444023008 and 0444023053, with the further references 21574984, 21738132 and 0444023051 carried on the same entry. Its recorded weight is 0.67 kg and its recorded size 16 × 13 × 19 cm. One line of the source record deserves a note: the entry's OEM number row prints 2238325, 2095566 and 2238324, which are the Scania pump references carried elsewhere in this catalogue — a serial overlap in the source data, reported here as printed rather than corrected. Quote the number from your old injector, and the reply states which entry covers it.
The Cummins and Iveco entries
The Cummins injector entry is referenced 2871878, with A028Y791 and 0444043008 among its further references; its recorded weight is 2.5 kg and its recorded size 30 × 5 × 5 cm. The Iveco injector entry is referenced 0444023058, with 5801730656, 504374327, 84247021 and DC465H298AA among its further references, also recorded at 2.5 kg. Those fields — references, weight, size — are what the entries state. Where two entries could claim a number, the engine the injector serves is the detail to add to the inquiry, and the reply separates them against their entries.
The supply-side record
An injector inquiry is built from a record, and the record is worth making carefully. Record the fault text from the vehicle exactly as it appears. Record any deposits you found and where you found them, and any live data you hold, with the injector's OE number and the engine type. And a weak pump or a partially blocked filter starves the spray of pressure, producing a dribble that deposits fluid exactly where it does most harm. That is why the pump and filter state belongs in the same record when it is known. When the replacement goes on, replace the sealing hardware as part of the same job.
The three groups, side by side
Read side by side, the deep-checked groups show how this family's records are built. The 0444023019 set carries the longest reference string of the three and the lightest recorded unit, at 0.67 kg in a 16 × 13 × 19 cm record. The Cummins entry 2871878 carries seven references in its string and a recorded weight of 2.5 kg at 30 × 5 × 5 cm. The Iveco entry 0444023058 carries five references in its string, also at 2.5 kg. None of the three records is interchangeable with another: a number from one string lands on its own entry, and the reply names that entry with the fields it carries.
Numbers from other families
An injector inquiry can arrive carrying a number that belongs to a neighbouring family — a pump module number, or a level sender number from the same repair. Such a number is not rejected: it is located in its own family, the reply names the family and the entry it belongs to, and the injector line of the inquiry is confirmed separately against the injector family. The same repair can therefore be quoted as one consignment — pump, injector and sender each confirmed against its own entry — without any line borrowing another line's confirmation.
The record, kept
The record described above is worth keeping after the order as well. File the fault text, the deposits noted, the live data and the bench result, where one was run, with the confirmed OE list from the order. A later inquiry for the same engine can quote that file: the earlier record is sent with the new inquiry, and the number is checked against its entry for the new order as it was for the first. The catalogue side keeps the same discipline in reverse — each order names the entry its number lands on, from that entry's own record.
Packaging and dispatch, as stated
The company states the dispatch availability that stands behind the family: more than 100 catalogued items can be dispatched within 3 days, and more than 2,700 within 15 days. The four packaging options — OEMEMBER branded, UAP branded, blue neutral and white neutral boxes — are chosen per consignment, and product certificates are available upon request.
Cleaning, as the catalogue leaves it
The catalogue entry for an injector records its references and applications; it does not record whether a given unit can be cleaned, and this page does not decide that either. Send the OE number and the engine type, and include the fault text from the vehicle: the reply confirms the entry your number lands on, and whether cleaning or replacement is the right step for your unit follows the maker's service information for that engine. The packaging options for the family are the OEMEMBER branded box, the UAP branded box, and blue or white neutral boxes. The company states that more than 100 catalogued items can be dispatched within 3 days and more than 2,700 within 15 days, and warranty terms are confirmed in the quotation before payment.
Workshop habits
Clogging risk can be reduced with workshop habits. Keep the filler neck and cap clean when the tank is filled. Record the first dosing-related fault code, with the date and the mileage, rather than clearing it and losing the sequence it belonged to. The shutdown sequence for the vehicle is the one in the maker's service information for that vehicle. Those three habits are the whole of what this page adds on prevention; the rest of an injector order is the record and the number.
Key takeaways
The DEF injector family holds 32 entries. Its deep-checked groups are the 0444023019 cross-reference set (0.67 kg, 16 × 13 × 19 cm), the Cummins injector 2871878 (2.5 kg) and the Iveco injector 0444023058 (2.5 kg). Record the fault text from the vehicle exactly as it appears, and send it with the OE number and the engine type. The entries record references and applications; they do not record whether a given unit can be cleaned, and this page does not decide that either.
Related pages: DEF injector family · DEF injector vs doser injector · DEF pumps
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Send the OE number, vehicle model and engine — fitment is confirmed against the catalogue before quoting.