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SKU:
NLT2E02225
Ships for free in 2–4 business days.
Diesel Fuel Injector for Isuzu 4JB1 4JB1T NKR NHR Trooper 2.8L Replaces 48-3220
$57.99
In Stock
$57.99
Sale price
$57.99
Regular price
This aftermarket diesel fuel injector replaces 48-3220 for compatible Isuzu 4JB1 and turbocharged 4JB1T 2.8L engines.
Estimated delivery between
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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
- Isuzu 4JB1 2.8L diesel engine
- Isuzu 4JB1T 2.8L turbo-diesel engine
- Isuzu NKR with compatible 4JB1 / 4JB1T engine
- Isuzu NHR with compatible 4JB1 / 4JB1T engine
- Isuzu Trooper 2.8 TD with compatible injector specification
Product Overview
White smoke, diesel knock, rough idle, hard starting, or one cylinder running cooler can point to a poor injector spray pattern—but low compression and injection-pump timing can look similar.
For the repair to hold up, the part still has to match the original application. This replacement injector is for compatible 4JB1-family engines. Have injectors bench-tested for opening pressure, leakage, and atomization before deciding whether one injector or the complete matched set needs service.
Key Features & Performance
- Mechanical diesel injector assembly
- Made for compatible 2.8L 4JB1 applications
- High-pressure threaded fuel connection
- Aftermarket replacement for listed references
Replaces Part Numbers
- 48-3220
- 48-3220G
- 9-432610325
- 9432610325
Common Uses
- Replacing a confirmed failed or damaged diesel fuel injector
- Correcting the symptoms described in the product overview after testing related parts
- Restoring dependable operation during repair or scheduled service
- Matching one of the listed reference numbers or compatible applications
Technical Specifications
- Product Type: Diesel fuel injector
- Engine Family: Isuzu 4JB1 / 4JB1T
- Quantity: 1 injector unless photos state otherwise
- Replacement Type: Aftermarket
Installation & Fitment
- Keep the injection system surgically clean
- Never test diesel spray against skin
- Use new seals and torque to service specifications
- Bleed air and check high-pressure fittings without touching them while running
Compatibility Notice
Northline Parts does its best to list all known compatible models, but the correct part may fit an application not shown.
Model names alone do not guarantee fitment. Production dates, serial-number breaks, engine packages, wiring, and installed options can change the part used on otherwise similar equipment.
Frequently Asked Questions
Q: What problem is this part commonly used to address? A: White smoke, diesel knock, rough idle, hard starting, or one cylinder running cooler can point to a poor injector spray pattern—but low compression and injection-pump timing can look similar.
Q: How should fitment be confirmed? A: Match the original part number first, then compare the connector or fittings, mounting points, dimensions, and machine or engine serial information.
Q: Is this an original equipment manufacturer part? A: No. This is an aftermarket replacement part for compatible applications.
Q: Can another fault cause similar symptoms? A: Yes. Wiring, grounds, hoses, filters, related controls, and mechanical wear should be tested as part of the diagnosis.
Q: What should be checked after installation? A: Confirm secure connections, normal operation, and no leaks, heat, binding, or warning indications before returning the equipment to service.
Part Summary
keywords: Isuzu 48-3220 injector, 4JB1 diesel injector replacement, 4JB1T rough idle repair, NKR 2.8 fuel injector, Trooper diesel smoke part, aftermarket Isuzu injector
Brand names, model numbers, and reference part numbers are used for identification and compatibility purposes only. Verify the original component, dimensions, and application before purchase.