Skip to product information
12_4539b66c-4744-479d-b355-fe2044de950a - Northline Parts

4-Pack Fuel Injector Nozzle 4W7015 OR3419 for Caterpillar 3204 931B 943 953 D3B

SKU: NLT2T04141
$323.99 In Stock
$323.99
Sale price  $323.99 Regular price 
Ships for free in 2–4 business days.
This is a four-piece replacement fuel injector nozzle for Caterpillar 3204, 931B, 943, 953, D3B; replaces 4W7015, OR3419.
Estimated delivery between
Shop at Northline Parts Best Customer Service Best Online Parts

Let Northline Parts Do the Heavy Lifting for You!

Not sure which part you need? Our team can help you find the right replacement.

Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT

Live Chat: Available 24/7

I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks

Edward H. — Verified customer

Compatible Models

We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.

Compatible equipment / model
Caterpillar 3204, 931B, 943, 953, D3B
Engine Series: Caterpillar 3204

Product Overview

Hard starting, rough running, smoke, diesel knock or poor cylinder balance can be caused by a worn injection nozzle, although compression, pump timing and fuel quality should be checked before parts are replaced.

This replacement nozzle restores the controlled spray pattern at the combustion chamber. It is suited to an injector-service job where the original nozzle is worn, leaking or no longer atomizing fuel correctly.

Key Features & Performance

  • Replacement fuel injector nozzle for the listed application
  • Built for repair of the original component when inspection confirms it is worn, damaged or failed
  • Match the original mounting, connections and part number before installation
  • Cross-references 4W7015, OR3419

Replaces / Cross-References

  • 4W7015
  • OR3419

What Is Included

4 replacement components as described in the product title.

Fitment Notes

Match the original part number, machine or engine model, mounting points, connector or hose/fitting style, and any serial-number restrictions before ordering. When a manufacturer uses multiple revisions within the same model family, the equipment serial number and original component should be the final fitment check.

Frequently Asked Questions

Is this a genuine OEM part?
No, unless the product page specifically states otherwise. This listing is for a replacement, accessory, upgrade or repair component as described above. OE and interchange numbers are provided for identification and fitment reference.

How should I verify fitment before ordering?
Compare the original part number, machine or engine model, mounting arrangement and electrical or hydraulic connections with the information above. For equipment parts, also verify the machine serial number whenever the manufacturer catalog uses serial breaks.

Part Summary

Keywords: fuel injector nozzle, Caterpillar 3204, 931B, 943, 953, D3B, Engine Series: Caterpillar 3204, 4W7015, OR3419.

Customers also purchased