Kubota V3800T SCR Filter 2018-2024: OEM 1j586-19103

Reliable SCR Emissions Performance for Cummins QSB 3.3L Engines (2018–2024)

What is it?
The Cummins QSB 3.3L SCR Filter (OEM 4353971) is an aftertreatment component designed for Cummins QSB 3.3L diesel engines produced between 2018 and 2024. As part of the Selective Catalytic Reduction (SCR) system, this filter enables the conversion of nitrogen oxides (NOx) into less harmful gases using Diesel Exhaust Fluid (DEF), helping reduce overall emissions output.

Why choose this SCR Filter?
Engineered to meet Cummins’ original specifications, this SCR filter is built for proper fitment and seamless integration with factory aftertreatment systems. SCR components are essential for emissions compliance—if efficiency drops due to contamination or wear, it can lead to system alerts or reduced performance. Replacing the unit with the correct OEM-specified filter helps restore proper exhaust treatment and maintain system balance.

This type of aftertreatment device is commonly used on Tier 4 QSB 3.3L engines to support regulated emissions performance. 

Key Benefits
✅ Designed for Cummins QSB 3.3L engines (2018–2024)
✅ Supports NOx reduction through SCR operation
✅ Helps maintain proper DEF-based emissions treatment
✅ Direct replacement — no modifications required
✅ Built for high-temperature, heavy-duty environments

Applications
This SCR filter is commonly used in light- to medium-duty equipment powered by Cummins QSB 3.3L engines. Typical applications include construction machinery, industrial equipment, compact loaders, and utility vehicles where emissions compliance and consistent aftertreatment performance are required.

Installation Notes
Before servicing, allow the exhaust and aftertreatment system to fully cool. Remove the existing SCR filter and inspect surrounding components such as DEF injectors, sensors, and mounting hardware for buildup or damage. Install the replacement unit using proper clamps and seals to ensure a secure fit. After installation, clear any stored fault codes and verify proper SCR system operation using diagnostics.

Final Thoughts
If your Cummins QSB 3.3L-equipped equipment is experiencing emissions warnings or inconsistent aftertreatment performance, replacing the SCR filter with the correct OEM component can help restore efficient exhaust treatment. The Cummins QSB 3.3L SCR Filter (OEM 4353971) plays a key role in maintaining compliant emissions output and dependable engine operation.