DLLA146P2437 Injector Nozzle Replacement for Bosch 0433172437
New DLLA146P2437 common rail injector nozzle (Bosch 0433172437) for the CRIN2-16-BL injector 0445120377, DCEC number C5307809, used on DCEC Dongfeng Cummins ISL9.5 and ISLe 9.5 engines. A Vidishi Auto compatible replacement, 12-month warranty. Single package 30 x 15 x 15 cm, 1.950 kg gross. MOQ 10 pcs. Wholesale export supply.
Original price was: $48.00.$15.00Current price is: $15.00.
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Product Specifications
| Weight | 1.95 kg |
|---|---|
| Dimensions | 30 × 15 × 15 cm |
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| model | |
| engine | |
| position |
Product Details
DLLA146P2437 Injector Nozzle by the Numbers
Verified identity and fitment data for this CRIN2-16-BL nozzle, supplied for the 0445120377 injector family.
The DLLA146P2437 injector nozzle is a bench-fit component rather than a complete injector: it seats inside the 0445120377 body, where its needle lifts to release the charge the injector has pressurised. A single dlla146p2437 nozzle serves one injector, so a rebuild usually calls for one nozzle per unit being refreshed. Reading the correction value each cylinder reports is the quickest way to tell whether the nozzle at that cylinder has started to drift out of trim.
Engine Compatibility for DLLA146P2437
This nozzle serves the Bosch CRIN2-16-BL injectors below, and through them the DCEC Dongfeng Cummins ISL applications. Match the injector number and the engine code before ordering.
| Injector | Bosch reference | Application |
|---|---|---|
| 0445120377 | 0 445 120 377 | DCEC Dongfeng Cummins ISL9.5 / ISLe 9.5 |
| C5307809 | DCEC OEM number | Same injector, DCEC catalogue number |
Vehicle applications (via the 0445120377 injector)
| Make | Model | Engine | Years | Injector |
|---|---|---|---|---|
| Dongfeng Cummins | DCEC trucks (ISL powered) | Cummins ISL9.5 | DCEC build | 0445120377 |
| Cummins | ISL9.5 / ISLe 9.5 engines | ISL9.5 | 2010- | 0445120377 |
| Cummins | ISL8.9 / QSL8.9 engines | ISL8.9 | catalogue-listed | 0445120377 |
Part number match
Match the number on your old nozzle to DLLA146P2437, or to the reference Bosch 0433172437. If your injector carries 0445120377, or the DCEC number C5307809 stamped alongside it, then the 0445120377 nozzle, the cummins injector nozzle built for that assembly and the diesel injector nozzles sold under either number are the same article group as this one.
Where the number is hard to read, a photograph of the injector body and the engine code plate is usually enough for us to confirm the build.
As a cummins nozzle for the DCEC-built ISL it covers the Dongfeng Cummins truck range, and the same reference serves as a cummins isl9.5 nozzle across the ISL9.5 and ISLe 9.5 engine builds listed above.
Fitment verification
- Injector part number — match the etched code on the injector body to 0445120377 or its DCEC number C5307809.
- Engine code plate — the plate on the block must read an ISL9.5 unit on Bosch common rail injection, not another family.
- Photo of the old nozzle — a picture of the nozzle and injector body so we match the code and not just the engine.
What the nozzle does in the injector
Inside a Bosch CRIN2-16-BL injector the nozzle is the last element in the fuel path, and the only one the combustion chamber ever sees.
On a common rail diesel a shared rail holds fuel at pressure and each injector is triggered electronically to release its charge. Inside the injector the nozzle is the last element in the chain: pressurised fuel reaches the nozzle holder, and when the injector opens, the nozzle needle lifts off its lapped seat so the fuel is forced through the spray holes and atomised into the combustion chamber. A common rail nozzle that has worn no longer meters cleanly, and the effect is felt across the whole engine rather than at one cylinder alone.
Two names describe the same article. In Bosch service literature it is filed as a nozzle, and on a diesel engine as a diesel injector nozzle; in parts catalogues the same piece is listed as a common rail injector nozzle or a fuel injector nozzle, and distributors shelve it under the plural forms common rail injector nozzles and diesel injector nozzles. Either way it is the small, precision-lapped part at the tip of the injector, and it is the component a spray-pattern problem usually points to.
Atomisation
Turns pressurised fuel into the fine mist the combustion chamber can burn cleanly.
Spray pattern
Sets the number, angle and direction of the jets through the spray holes.
Sealing
The needle and body are lapped as a pair, so the nozzle holds rail pressure between injections.
The injector nozzle assembly is a matched pair rather than a single part: the nozzle body carries the spray holes and the nozzle needle valve is lapped into it, so the two are renewed together. On this architecture the DLLA-type body is a slim pencil nozzle that sits in the injector’s nozzle holder and is clamped by the retaining nut, with the needle free to lift a few microns on every injection. Once the lapped fit between needle and body is lost, no cleaning routine brings it back.
Because the nozzle is the final metering element, a worn body changes the shape of the spray long before it stops the engine. Soot loading rises, the burn gets lazy and the correction values the ECU applies drift away from zero. That is why a nozzle is judged on spray pattern and on the balance the ECU reports, not on whether the engine still runs.
Two numbers worth separating: the nozzle number identifies the article you are holding, and the injector number identifies the assembly it seats in. A nozzle that carries the right number but is fitted to the wrong injector revision will still allow the engine to run, and the balance values will look almost plausible — which is why we ask for the injector number rather than the model name.
Fuel injector nozzle, diesel injector nozzle, common rail nozzle — three trade names
Which of those names a supplier writes on the offer depends on who is buying. A workshop ordering for a bench rebuild asks for the spray component and quotes the injector number. A fleet parts desk sourcing for a van or a light truck quotes the engine code instead. A distributor stocking the Bosch range quotes the trailing DLLA digits. The article behind all three labels is the same piece, and so is the test that settles the match: the number etched on the body, not the wording on the invoice.
That is the reason we ask for the injector number rather than the model name. Whether your own paperwork calls this a fuel injector nozzle, a diesel injector nozzle or simply a Bosch replacement nozzle, the code on the part is what we confirm, and the code we ship against is the one you state.
Stock is held by reference rather than by model year, which is why the same diesel injector nozzles serve the truck and engine applications set out above. A rebuild batch spanning more than one of those bodies still draws on a single article number.
Technical Specifications
Verified parameters for this CRIN2-16-BL nozzle, graded at the ISL9.5 platform level. Items the manufacturer does not publish are flagged, not guessed.
- Confirmed — taken from the reference part records and injector fitment data.
- Reference — numbers that describe the same article group or the injectors it fits, not a claim of OE equivalence.
- Not published — values that depend on the bench test report or the injector revision; we do not state a figure we have not verified.
| Reference / OE number | DLLA146P2437 (Bosch 0433172437) |
|---|---|
| Fits injectors | 0445120377 (DCEC C5307809) |
| Interchange (injector) reference | 0 445 120 377 (DCEC C5307809) |
| Component type | Common rail injector nozzle (DLLA P-code) |
| Fuel system | Bosch common rail (CRIN2-16-BL) |
| Spray angle | 146 degrees |
| Engine code | ISL9.5 family (ISLe 9.5, ISL8.9) |
| Displacement | 8.9 L / 9.5 L |
| Application | Via 0445120377: DCEC (Dongfeng Cummins) trucks and Cummins ISL9.5 / ISLe 9.5 engine builds |
| Condition | New |
| Warranty | 12 months |
| Nozzle hole count | Not published |
| Needle lift | Not published |
| Opening pressure | Not published |
| Emission | Not published (platform-dependent) |
Parameters marked Not published are not asserted anywhere on this page, and no figure is substituted for them further down. Where your workshop needs a specific reading, request the test report for the unit you receive.
This dlla146p2437 bosch nozzle — the 0433172437 nozzle in Bosch ordering form — is supplied as the nozzle and needle assembly only. The diesel nozzle seats in the injector’s nozzle holder against a lapped face, and a fuel nozzle run on contaminated fuel will score that face. The nozzle spray hole set, the nozzle spray angle and the nozzle spray tip geometry are fixed by the reference design: the 146 degrees recorded in the part number, a figure shared by every article in the DLLA 146 P family. A spray hole that has eroded will not deliver the same pattern at rail pressure, which is why the nozzle and needle are replaced as a set rather than re-lapped in the field. Buyers comparing injector nozzle size, the diesel nozzle tip profile or a common rail nozzle kit should note that only the nozzle and needle pair is supplied here and the holder stays with the injector.
In workshop use the article is grouped with other injector nozzle types by tip family, and injector nozzle size is read from the holder bore rather than from the overall length, so a bare measurement will not identify the part on its own.
Fuel nozzle and diesel nozzle: what the two trade terms cover
Both terms are used for this same assembly, and neither narrows the specification. A counter serving workshops tends to write the part up with the shorter wording and quote the article number. A parts desk buying for a diesel fleet writes it up with the other and quotes the injector it is built for. What arrives in the box is identical either way: a body carrying the spray holes, and the needle lapped into it as a matched pair.
What does change the specification is the family code. The trailing DLLA 146 P digits fix the spray angle at 146 degrees, and that figure is shared across every article in the family — so two listings that read almost the same but differ in the last digits are two different nozzles. If your own paperwork says diesel nozzle and ours says fuel nozzle, compare the trailing digits rather than the wording before you commit the order.
A diesel fuel nozzle for this platform is judged on the spray it produces at rail pressure rather than on the label on the carton, and the same holds when it is sold as a Bosch nozzle for the CRIN2-16-BL range. The clamping section in Bosch service data is the nozzle holder; in the aftermarket the same section is written up as the diesel nozzle holder, and it is part of the injector body rather than a separate item in the box.
Failure Symptoms
Bad nozzle symptoms and common rail nozzle failure signs to watch for on CRIN2-16-BL injectors before the nozzle is replaced.
- Rough idle or a persistent misfire on one cylinder
- Excess fuel knock, especially when cold
- Noticeable power loss under load
- Higher fuel consumption than the vehicle’s norm
- Black or grey smoke from the exhaust
- Hard starting or extended cranking
- Return flow readings the ECU flags as out of range
- Uneven running that clears at higher engine speed
These injector nozzle symptoms overlap with rail pressure, wiring and compression problems, so a scan tool reading plus a return-flow test is the normal way to isolate a single unit. Summaries of the stored codes are grouped on our diesel fault codes page, and the list above can be read alongside live correction values rather than trusting the parts cannon.
Most common rail nozzle failure on this platform comes from wear and fuel contamination rather than from the injector solenoid. A nozzle flow reading taken on a nozzle tester is the usual bench step, and nozzle testing with a nozzle calibration sheet can be supplied with the unit on request. The classic giveaway is a nozzle spray pattern that has gone coarse or asymmetric once nozzle wear has set in, since nozzle erosion opens the spray holes and nozzle carbon builds on the seat face: the engine still starts, but it smokes and the cylinder balance drifts. An injector nozzle cleaning routine can recover a lightly coked nozzle, yet once the lapped needle and body have worn there is nothing left to clean, and the nozzle has to be renewed. An injector nozzle replacement should follow a confirmed diagnosis: read the per-cylinder correction values, compare return flow across the four, and only then commit to the nozzle that the ECU is constantly trimming. Renewing all four nozzles as a set is worth considering on high-mileage injectors, where the remaining units are usually at a similar stage of wear.
Rebuild and installation notes
Fitting a nozzle is a cleanliness-critical job: the nozzle and needle are lapped as a matched pair and the injector body they sit in cannot be re-lapped in the field.
Confirm the code
Record the injector number and the calibration code before stripping the unit.
Depressurise
Work on a clean bench and depressurise the fuel system before opening an injector.
Strip and clean
Remove the retaining nut, lift out the old nozzle and needle, then clean the seat face and the nozzle sac so that no nozzle coking, carbon or swarf is trapped under the new nozzle.
Keep the pair together
Keep the new nozzle and its own needle together — mixing a used needle with a new body loses the lapped fit and the spray pattern with it.
Torque to data
Fit the nozzle squarely and torque the retaining nut to the figure your workshop data gives for the injector in front of you.
Refit with seal and test
Refit the injector with a new seal ring and any single-use fasteners, write the calibration code the ECU requires, then check for leaks at idle before a road test.
A common rail injector nozzle replacement is normally done as part of an injector rebuild rather than in the vehicle. Because the nozzle is matched to the injector revision, a nozzle replacement should be confirmed against the injector number before the assembly goes back together. A slide-hammer injector puller is the usual tool for a unit that has seized in its seat, and the seat itself must be cleaned before the assembly goes back in.
A short walkthrough on how to test a diesel injector nozzle, and the readings worth recording, sits alongside the step-by-step notes and tooling photographs on our injector installation guide. Torque values and clamp sequences are injector-specific; take them from your workshop data for the unit in front of you.
Nozzle replacement and nozzle holder notes
Most of the risk in this job sits in two places. The first is the seat: carbon left on the face the assembly clamps against holds it off its seal, and the leak shows up as a misfire long before it shows on any gauge. The second is the pairing. The needle belongs to the body it was lapped into, so an assembly built from a used needle and a new body will not hold pressure however carefully it is torqued down. Clean the recess in the fuel nozzle holder, keep the new pair together, and the two commonest comebacks on a bench rebuild are removed before they start.
Where an assembly has seized in its bore, do not lever it out against the spray face. Work it free with a puller, then check the bore for scoring before the new unit goes in. A scored bore will not be cured by renewing the nozzle alone, and in that case the whole assembly is the repair.
Reference and interchange numbers
Need a DLLA146P2437 cross reference or a DLLA146P2437 equivalent? The interchange numbers below are the ones buyers match against. All are reference interchanges only.
A bosch common rail nozzle, a bosch injector nozzle or a bosch nozzle from another family will not interchange with this article; the article listed as bosch dlla146p2437 is the one matched to the CRIN2-16-BL injectors above. A nozzle interchange against C5307809 is safe only when the injector body itself carries that number, and C5307809 is listed alongside them in the Bosch cross reference. These numbers identify the same article group; they are not a statement that this unit is an original-equipment part.
The injector assembly carries its own number and the table above deliberately stops at nozzle level. If your old unit is stamped with a number that does not appear here, send us a photograph of the injector number before ordering and we will check it against the CRIN2-16-BL injectors.
Two suppliers can quote the same article under different wording — one listing a Bosch injector nozzle, another a nozzle for the CRIN2-16-BL range, a third a short DLLA reference. None of those descriptions identifies the article on its own. The two fields that do are the trailing DLLA digits and the injector the unit is built for, which is why we record both on the offer we send.
Build quality and inspection
Every nozzle is built from precision-ground components and checked before it leaves us.
Every nozzle is built from precision-ground components: the needle is lapped into its body to the CRIN2-16-BL architecture used by the ISL9.5 engine family, so the spray pattern matches the injector it was built for. The spray holes are formed and finished so the jets keep their angle across the service interval rather than widening as they wear in.
The internal numbers inside the assembly are rev-dependent: confirm by injector revision or by the injector number on the body before ordering, because one 2.3 platform can carry more than one nozzle revision across its production years.
Units are checked mechanically and hydraulically before they leave us. Where a workshop wants figures rather than a pass or fail, the assembly can be run on a common rail injector tester with the new nozzle fitted and the report supplied with the order.
Alongside complete injector nozzles we hold common rail injector parts for this family, so a rebuilder can service an assembly instead of replacing it whole. Where a workshop is ordering an injector nozzle kit rather than the nozzle on its own, the internal numbers are confirmed against the injector revision you send us.
Wholesale & bulk supply
Vidishi Auto is an export supplier of diesel fuel system parts, serving workshops, injector rebuilders and distributors who service Bosch CRIN2-16-BL injectors in volume.
10 pcs, with tiered terms as quantity rises.
Matched batches for rebuild benches and workshop stock.
Each nozzle is individually tubed and carton-sealed for freight.
Our injector nozzle wholesale programme runs from a small batch through to container quantities, and as one of the common rail nozzle suppliers serving export workshops we consolidate mixed fuel system orders into a single shipment. Rebuild benches and distributors who buy fuel injector nozzles as a standing line are quoted on tiered terms rather than on a single carton. We serve diesel nozzle suppliers and diesel nozzle wholesale accounts in several markets, and nozzle bulk orders are packed to a single shipping mark. Send your required quantity and destination port for a quotation. Tiered terms and lead times are on our wholesale pricing page. Mixed orders across the fuel system range can be consolidated into one shipment to keep freight cost per unit down.
Packaging, weight and shipping
Export packing and freight for single boxes through container volumes, quoted per order.
30 × 15 × 15 cm.
1.950 kg gross per pack.
10 pcs.
Individual protective tube, wrap, carton sealed.
The 30 × 15 × 15 cm pack is sized for tubed nozzles, so a set for a six-cylinder rebuild ships as a compact carton rather than a stack of oversize boxes. The packaged shipping weight is 1.950 kg gross per pack, which includes the nozzles, the protective tubes and the sealed bag. Freight options and delivery estimates are set out on our shipping information page; returns and cancellations are covered under returns.
The diesel nozzle price for this reference moves with quantity and freight, so the figure that applies to your order is the one quoted and confirmed before dispatch. Whether you are comparing a quotation from a local distributor or a figure from another exporter, ask for it to include freight and the warranty terms so the comparison is like for like.
Export paperwork for injector nozzle export orders is issued with the dispatch documents so customs clearance is not delayed at the destination.
For a small rebuild batch the courier option is usually the fastest route; for a workshop quantity, a consolidated carton or a pallet brings the freight cost per piece down. Where a shipment is going to a resale address, ask for the commercial invoice and packing list to be issued with the dispatch documents so customs clearance is not held up at the destination.
Frequently Asked
Common questions about the DLLA146P2437 injector nozzle and ordering a compatible replacement.
Is DLLA146P2437 an original Bosch nozzle?
Which injectors does this nozzle fit?
Is this a complete injector?
How do I know it fits my injector?
What is the minimum order quantity?
What is the spray angle, and does it matter?
Does the nozzle come with its needle?
What warranty applies?
Which other numbers refer to the same article?
How long does a nozzle replacement take?
Can I replace the nozzle myself?
What is the lead time, and can I return an unused nozzle?
Need Help matching?
Send the engine nameplate and the old injector photo; we confirm the DLLA146P2437 match before you pay.
Injector number and engine code confirmed against the CRIN2-16-BL applications.
Available for the unit that is shipped, on request.
Help reading return-flow and rail pressure results before you commit to a replacement.
Order the DLLA146P2437 nozzle
Confirm your injector number and we will match the nozzle to your CRIN2-16-BL injector. Minimum order ten pieces, with wholesale quantities available.
Brand and compliance note
Vidishi Auto is an independent supplier of compatible replacement parts. Brand names are used only to describe the application.
Vidishi Auto is an independent supplier of compatible replacement parts. Reference to Bosch, Dongfeng and Cummins is made only to describe the application and the reference design. Those names, and the part numbers quoted on this page, are the property of their respective owners, and this page does not imply any affiliation with or endorsement by them.
The assembly described here is not a Bosch-branded product. It is offered for the 0433172437 application and is warranted by Vidishi Auto for 12 months.
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