The Cummins fuel injector (Part #4937065) is a high-pressure common rail (HPCR) injector designed for precision fuel delivery in modern diesel engines.

Below are its key characteristics:

Application:

This injector is commonly used in Cummins ISX engines (likely for the CM871, CM876, or related models).

It may also fit some QSX15 industrial or marine engines.

Compatibility:

Replaces older part numbers like 4937036, 4937044, or 4937057 (depending on the engine configuration).

Used in engines with high-pressure common rail (HPCR) fuel systems.

Features:

Electronically controlled (ECU-managed) for precise fuel delivery.

Designed for ultra-low sulfur diesel (ULSD) and modern emissions standards.

May include improved spray patterns for better combustion efficiency.

Common Issues:

Clogging from contaminated fuel.

Leaking seals or o-rings causing fuel dilution in oil.

Electrical failures (solenoid or wiring issues).

Carbon buildup leading to poor spray patterns.

What kind of CUMMINS QSX15 fuel injector will you get from Trade Ultra ?

1. You’ll get it all with; 100% O-ring replacement for proper sealing, a new Actuator Assembly, Spill Valve, To top it off, every nozzle is tested for 100% proper fuel delivery. It just doesn’t get much better than that.

2. Meticulous testing? You got it! This injector goes through a strict reassembling and testing process for fuel delivery, injection pressure, and timing. If you want more power and reduced emissions, this is the way to go.

3.To put things in perspective, you’re getting proper fit and function because strict OE specifications are met.

There’s no doubt you’ll get exceptional quality and consistency. Why? Each injector is completely disassembled, components are cleaned, and lastly this bad boy is checked for wear and breakage. It comes from the reconstruction of China’s top fuel system OEM manufacturing factory, you can’t beat it .