How do I confirm pilotpart809235 fits my machine?

Compare the OEM or reference part number, machine model, engine model, and serial number. You can also submit a fitment inquiry before ordering.

In Stock

Fuel Injector 3939401 4089727 for Cummins Engine 4B3.9 6C8.3 B3.3 B4.5 ISB6.7 QSB6.7 4BT3.9 6BT

For Cummins Injectors & Nozzle

Injectors & Nozzle 3939401 for Cummins

Q: What part numbers are associated with this Injectors & Nozzle?

3939401, 4089727, 4089727nx, 6C8.3, B3.3, 4BT3.9, B4.5, ISB6.7, QSB6.7, 4089727rx

OEM / REF: 3939401SKU: pilotpart809235

Fuel Injector 3939401 4089727 for Cummins Engine 4B3.9 6C8.3 B3.3 B4.5 ISB6.7 QSB6.7 4BT3.9 6BT is a Injectors & Nozzle replacement part for Cummins Engine Spare Parts, categorized under Engine Spare Parts > Injectors & Nozzle. Use OEM part number 3939401 and confirm machine model, engine model, and serial details b...

Stock: In stock
Condition: New
Fitment: Cummins Engine Spare Parts
Category: Injectors & Nozzle

Fitment support before you order
Worldwide delivery options

In stock — ready to order

$64.00USD/EA

Estimated delivery by quantity

Estimated delivery windows
Qty	Estimated delivery
1	Oct 22 – Oct 29
10	Oct 20 – Oct 27
50	Oct 18 – Oct 25

Estimates from today; confirm exact lead time before payment.

Quantity

Buy online now or add to your quote list for bulk pricing and fitment confirmation.

Confirm fitment before ordering →

Lead times can vary by freight route and customs. Contact support for expedited shipping.

Injectors & Nozzle Description

This Injectors & Nozzle is indexed for Cummins s : 4B3.9, 6C8.3, B3.3, 4BT3.9, 6BT, B4.5, ISB6.7, QSB6.7, ISB6.7 CM2350 B101, QSB6.7 CM2250. Compare reference number 3939401 against the label on your existing Cummins component before ordering.

Additional cross references on file: 4089727, 4089727nx, 6C8.3. If your machine plate shows a different number, submit a fitment inquiry with photos before checkout.

Part Numbers and Cross References

3939401 4089727 4089727nx6C8.3B3.34BT3.9B4.5ISB6.7 QSB6.7 4089727rx

Applications

Cummins s : 4B3.9, 6C8.3, B3.3, 4BT3.9, 6BT, B4.5, ISB6.7, QSB6.7, ISB6.7 CM2350 B101, QSB6.7 CM2250

Fitment Notes

Brand or application signal: Cummins Engine Spare Parts
Product family: Injectors & Nozzle
System category: Engine Spare Parts > Fuel System > Injectors & Nozzle
Recommended verification: OEM number, engine model, serial number, old part photos, and dimensions.

Shipping & Returns

Availability: InStock
Shipping: Shipping quotes can be confirmed before payment for heavy or urgent orders.
Returns: Returns are easier when fitment is confirmed before ordering.
B2B support: Bulk, fleet, and repair-shop requests can be handled through the inquiry form.

Frequently Asked Questions

How do I confirm this part fits my machine?

Match the OEM or reference number first, then verify machine model, engine model, serial number, connector layout, mounting points, and old part photos.

Can I order if my part number is not listed?

Yes. Send the old part number, machine plate, and photos through the fitment inquiry form. Support can review possible replacements or alternatives.

Is this an OEM part?

Products are indexed as replacement parts unless explicitly marked otherwise. Always compare reference numbers and confirm fitment before purchase.