Cummins ISL DPF Filter 2018-2021: OEM 4354211

Particulate Filter for Cummins ISL Engines (2018–2021)

What is it?
The Cummins ISL DPF Filter (2018–2021), identified by OEM part number 4354211, is a Diesel Particulate Filter designed for Cummins ISL diesel engines made between 2018 and 2021. This component is part of the engine’s emissions aftertreatment system and is responsible for capturing and holding soot (particulate matter) produced during combustion, helping reduce visible exhaust smoke and regulated emissions.

Why choose this DPF Filter?
This DPF is manufactured to match Cummins’ original specifications for the ISL platform, ensuring accurate fitment and seamless integration with the rest of the aftertreatment hardware. A properly functioning DPF helps maintain balanced exhaust flow and supports the engine’s emissions control strategy. When a filter becomes clogged or worn, it can restrict exhaust flow, potentially leading to higher backpressure, reduced system responsiveness, or emissions system alerts. Choosing the correct OEM-specified DPF helps support steadier exhaust behavior and a more predictable operating experience.

Key Benefits
✅ Designed specifically for Cummins ISL engines (2018–2021)
✅ Captures particulate matter to curb exhaust soot emissions
✅ Helps sustain consistent exhaust flow and reduced restriction
✅ Direct replacement — no modifications required
✅ Constructed for demanding duty cycles and heavy-duty exhaust conditions

Applications
This DPF filter is suited for medium- and heavy-duty vehicles equipped with Cummins ISL engines manufactured between 2018 and 2021. It’s commonly found in delivery trucks, vocational work vehicles, regional transport rigs, and fleet equipment where particulate control and emissions compliance are essential to daily operation.

Installation Notes
Before servicing, allow the exhaust and aftertreatment system to cool completely to avoid burns or component damage. Remove the old DPF filter and inspect surrounding exhaust components, sensors, and mounting hardware for soot accumulation, cracks, or other wear. Install the replacement filter with the appropriate gaskets and clamps, ensuring a secure, leak-free fit. After installation, clear any stored fault codes and verify proper exhaust behavior using diagnostic tools.

Final Thoughts
If your Cummins ISL-equipped vehicle is showing signs of elevated backpressure, frequent soot-related alerts, or reduced aftertreatment consistency, replacing the DPF with the correct OEM-specified unit can help restore steadier emissions conditioning and more predictable exhaust flow. The Cummins ISL DPF Filter (OEM 4354211) plays a crucial role in particulate management and supports dependable engine operation across varied duty cycles.