Sensor guide
NOx Sensors for Cummins: The Catalogued References
The three deep-checked Cummins references
Three Cummins references in the NOx family are deep-checked. The first is 5WK96751C, carried under article number OE212148. The second is 5WK96740, article OE211906. The third is 5WK96741B, article OE212211. For each of the three, the catalogue record holds the reference itself, its article number and its application as listed. That is the extent of the per-entry record reported here: the entries do not print a specification block of the flagship's depth, and this article does not supply one from elsewhere. A buyer holding any of these numbers sends it, and the reply confirms the entry it lands on before quoting.
What the entries do not record
The Cummins entries do not record which position on a given engine a reference serves, and they do not record construction or calibration detail. Which reference serves which position on your engine is a property of the individual entry read together with the engine maker's service information; it is confirmed at inquiry against your OE number, not inferred from the existence of three references. Where readings from the vehicle are part of the record, they are filed with the inquiry as recorded: neither reading is declared true or false on its own; the pair is judged together, against the engine's operating conditions and the maker's service information. The catalogue side works from the number, the engine model and the position wording your fault text supplies.
Cummins references elsewhere in the catalogue
Cummins applications appear in neighbouring families as well. The injector family carries the Cummins injector 2871878 with further references including A028Y791 and 0444043008, walked on the DEF injector article of this blog. A pump-family cross-reference string lists 2871879RX among its numbers, reported here as the string prints it. Within the NOx family listing itself, further Cummins-titled entries are listed by number only, among them the reference 5WK96752C; a title-only entry is confirmed the same way as a deep-checked one — by sending the number — with the reply stating what the entry records and what it does not.
Each reference, quoted back
A confirmation for a Cummins number quotes the entry back to the buyer: the reference itself, its article number, and its application as listed. For 5WK96751C that is article OE212148; for 5WK96740, article OE211906; for 5WK96741B, article OE212211. Quoting the entry back is what makes the confirmation checkable: the buyer compares the quoted application against the engine in front of them, and any mismatch is visible before an order is placed rather than after a part arrives. Where the application as listed does not cover the buyer's engine, the reply says so, and the number is checked against the family's remaining entries.
Title-only Cummins entries
Beyond the three deep-checked references, the family listing carries further Cummins-titled entries by number alone, the reference 5WK96752C among them. A title-only entry records its title, its number and its place in the listing; it does not record an article-number walk of the deep-checked kind. Such an entry is ordered the same way: the number is sent, the entry is named in the reply with what it records, and anything the order turns on beyond that record is confirmed at inquiry against the old part and the engine model. The depth of an entry changes what can be quoted from it, never the route by which it is confirmed.
Mixed Cummins orders
A Cummins inquiry can carry more than the NOx number. The injector family's Cummins entry 2871878 and the pump family's Cummins-referenced modules are separate entries in their own families, and a single inquiry can list a number from each family: every line is matched against its own family's entry, and the reply answers line by line. Distributors building a Cummins stock list can send the numbers as a spreadsheet and receive the same line-by-line matched or not-matched reply. The discipline does not change with the size of the list: one number, one entry, one confirmation.
What a reply contains
The reply to a Cummins NOx inquiry names the entry the number lands on, quotes its article number and application as listed, and states price, packaging and dispatch for that entry. Dispatch follows the company's stated availability, and the line applying to your entry is confirmed with the quote. If the doser is being replaced in the same repair, that line is answered from the injector family's entry in the same reply, each part confirmed against its own record.
The wider NOx family behind the Cummins page
The Cummins references sit inside the 109-entry NOx family, whose deep-checked entries also carry Scania, Volvo, Iveco and Mercedes-Benz applications. A Cummins number that lands on no Cummins-titled entry is still checked against the whole family before the reply is written, and the reply names the entry it belongs to, whichever brand its title carries. The family is one shelf for this purpose: the brand pages draw their references from it, and the confirmation standard — the entry quoted back — is the same on every one of them.
What to send with a Cummins NOx inquiry
Send the OE number from the old sensor's module or cable label, the engine model, and the position wording from your fault text where it names one. If the doser is being replaced in the same repair, say so: the Cummins DEF injector 2871878 is catalogued in the injector family and can be quoted on the same inquiry. The company's FAQ states that a single-piece NOx sample order is accepted when the item is in stock. The company states that more than 100 catalogued items can be dispatched within 3 days and more than 2,700 within 15 days. Packaging is the buyer's choice among OEMEMBER branded, UAP branded, blue neutral and white neutral boxes, and warranty terms are confirmed in the quotation before payment.
The 5WK prefix
Many references in the NOx family carry the 5WK prefix as printed — the flagship 5WK96612E, the Cummins references 5WK96751C, 5WK96740 and 5WK96741B, the Iveco 5WK96733B and the 5WK97373 entry among them. The prefix is part of the number: quote it in full, with the digits that follow it, because the confirmation is made against the complete reference. A partial number is checked as far as it goes, but the entry named in the reply is the entry for the full number sent.
Key takeaways
The catalogued Cummins references are 5WK96751C (Art. OE212148), 5WK96740 (Art. OE211906) and 5WK96741B (Art. OE212211). Their entries record title, article number and application as listed; they do not record position, construction or calibration detail, which is confirmed at inquiry against your number and the engine maker's service information. Send the OE number, the engine model and the position wording from your fault text where it names one. The Cummins injector 2871878 can be quoted on the same inquiry.
Related pages: NOx sensors for Cummins · DEF injectors · the NOx sensor family
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Send the OE number, vehicle model and engine — fitment is confirmed against the catalogue before quoting.