wp20540 - Genuine Cummins Aftertreatment Device - 2 - wisentpartscenter.com

Description

Cummins 4353085 Aftertreatment Device - Genuine Cummins Catalyst Module

The Cummins 4353085 is a genuine Cummins aftertreatment catalyst module. It converts regulated exhaust constituents into less harmful compounds as part of the engine's emissions system, and works together with the upstream and downstream components to keep the truck in compliance.

Key Functions:

- Converts regulated exhaust pollutants downstream of the engine

Fitment & Specifications:

- Weight: 104 lbs

Verify fitment with us before ordering to ensure the correct part for your application.

Purpose of the Part

The 4353085 is the catalyst module in the exhaust aftertreatment system. Exhaust passes through the substrate, where the catalyst coating converts regulated pollutants before the gas leaves the system. Its performance depends on the engine running correctly upstream, since exhaust temperature and engine-out conditions determine how well the catalyst works.

Issue Symptoms / When to Replace

- Aftertreatment warning lights, power derate, and catalyst efficiency or NOx conversion fault codes. Frequent regens or abnormal exhaust temperatures as the system compensates. Rising backpressure if the module becomes restricted.
- Faults that persist after sensor replacement usually point to a catalyst that is no longer active. Correct the upstream cause first: injector overfueling, oil consumption, EGR faults, boost leaks, or exhaust leaks will contaminate a new module quickly.

Brand Information

Cummins has built diesel engines since 1919 and is one of the largest independent engine manufacturers in the world. Its Cummins Emission Solutions division builds complete aftertreatment systems, with each catalyst engineered as part of a matched set alongside the other modules in the assembly.

Installation Notes

- The module is heavy at 104 lbs. Support it before breaking the joints loose so the weight does not hang on a sealing face and distort it.
- Note orientation and sensor port positions before removal. Inspect the rest of the aftertreatment assembly while it is apart. After install, check the full assembly for leaks and confirm the sensors read correctly.

How to Identify an OEM Part

A genuine unit is stamped with the Cummins part number on the housing shell.

Why Buy 4353085 from Wisent Parts

  • ⏱️
    Fast shipping
    Orders before 12PM EST ship same business day.
  • 🛡️
    180-day warranty
    All parts covered from delivery date.
  • ↩️
    Easy returns
    30-day returns.
  • ✅
    Verify fitment
    Send VIN/ESN and we’ll confirm.

Shop with confidence

Warranty & Return Information
Warranty Information

Wisent Parts offers a 180-day warranty on all parts from the date of delivery. This warranty covers orders placed directly through our website. If a part fails during this period, we’re here to help - whether it’s a replacement, repair, or refund. For full details, refer to the Warranty page.

Return Information

Wisent Parts accepts returns within 30 days of delivery. All returns are subject to a restocking fee. To qualify, parts must be unused and in their original condition. For full return instructions and restocking fee details, please refer to the Returns page.