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TG-A0021394 6PCS Fuel Injectors 3977689 for Cummins 6BT5.9 4B3.9 B5.9 Diesel Engines | High-Performance Replacement

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PRODUCT DETAILS

TG-A0021394 6PCS Fuel Injectors 3977689 for Cummins 6BT5.9 4B3.9 B5.9 Diesel Engines | High-Performance Replacement

OEM / Compatible Part Numbers

3977689
3802644
SDLLA155M37670 3977689R

Product Description

This 6-piece fuel injector set is designed as a replacement for Cummins diesel engines using injector part number 3977689, including 6BT5.9, 6B5.9, 4B3.9 and B5.9 applications. The injector is engineered to provide accurate fuel delivery and effective atomization for reliable combustion, stable engine operation and consistent performance. It is suitable for replacing worn, clogged or malfunctioning injectors and is supplied as a complete six-piece set for applications requiring replacement of all engine injectors.

Product Specifications

Specification	Details
Product Type	Diesel Fuel Injector
Part Number	3977689
Quantity	6 Pieces
Compatible Brand	Cummins
Compatible Engines	6BT5.9, 6B5.9, 4B3.9, B5.9
Fuel System	Mechanical Direct-Injection Diesel
Injector Nozzle Reference	SDLLA155M37670
Condition	New Aftermarket Replacement
Application	Diesel Engine Fuel Injection
Product Weight	Approx. 1.00 kg (1000 g), Estimated
Gross Weight	Approx. 1.50 kg （1500 g), Estimated
Package Dimensions	Approx. 30 × 22 × 12 cm, Estimated

PRODUCT HIGHLIGHTS

Product Highlights

Feature	Description	Benefit
Direct Replacement	Replaces injector 3977689	Simplifies replacement
Precise Fuel Delivery	Designed for consistent diesel injection	Supports stable combustion
6-Piece Set	Complete injector set for 6-cylinder applications	Convenient full-set replacement

SHIPPING

Item Details

Processing Time Orders are processed within 1-3 business days after payment confirmation

Shipping Methods DHL/UPS/ FedEx/ TNT/ Air Freight/ Sea Freight

Estimated Delivery Time Express shipping: 3-7 business days, depending on destination

Packaging Export-standard cartons with protective inner packing

Tracking Tracking number will be provided once the order is shipped

Shipping Cost Calculated based on weight, dimensions, and destination

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WARRANTY POLICY

All new aftermarket parts come with a 1-Year warranty. Quality is the first thing we consider. Check out our Warranty Assistance for more details.

SHIPPING POLICY

We offer express and standard shipping options to ensure your off-road machine gets back in action—fast and reliably. For more details, please visit our Shipping Policy .

EASY RETURN POLICY

We prioritize your satisfaction. If your order doesn't meet your expectations within 90 days, you may be eligible for a refund. See our Easy Return Policy for details.

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