Buy 2191864PE - Genuine Paccar SCR Outlet Catalyst Module MX-13 - 2 - wisentpartscenter.com

Description

The Genuine PACCAR SCR Outlet Catalyst Module is an exhaust aftertreatment component for PACCAR MX-13 12.9L diesel engines. It uses selective catalytic reduction (SCR) technology to convert nitrogen oxides (NOx) into nitrogen and water vapor through a reaction with ammonia derived from diesel exhaust fluid (DEF). The catalyst helps reduce NOx emissions and maintain proper aftertreatment system operation.

Fitment & Specifications

- Brand: PACCAR
- Part Type: SCR Outlet Catalyst Module
- Engine: PACCAR MX-13 12.9L
- Emissions Generation: EPA 2017
- Model Years: Select 2018–2021 applications
- Vehicles: Kenworth and Peterbilt trucks
- System: Selective Catalytic Reduction (SCR)

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

Purpose of the Part

The PACCAR SCR Outlet Catalyst Module reduces NOx emissions from diesel exhaust. DEF injected upstream produces ammonia, which reacts with NOx inside the SCR catalyst to form nitrogen and water vapor. Proper catalyst operation maintains NOx conversion efficiency and helps prevent emissions-related engine derates.

Issue Symptoms / When to Replace

A damaged or ineffective SCR catalyst may cause:

- Check Engine light or SCR system warnings.
- High NOx emissions or low SCR conversion efficiency.
- Engine derate or speed limitation.
- Failed SCR efficiency tests.
- Exhaust leaks around the catalyst connections.
- Excessive exhaust restriction if the catalyst is physically damaged or blocked.

Similar symptoms can result from a faulty DEF doser, contaminated DEF, damaged NOx sensors, exhaust leaks, or incorrect exhaust temperatures.

Brand Information

PACCAR manufactures MX-series diesel engines for Kenworth and Peterbilt trucks. Its exhaust aftertreatment systems use SCR technology to meet diesel emissions requirements. Genuine PACCAR catalyst modules are specified for the corresponding vehicle and emissions-system configuration.

Installation Notes

Before installing the SCR Outlet Catalyst Module, inspect the exhaust connections, clamps, and gaskets for damage or leaks. Check the DEF dosing system and related sensors for faults. Replace required seals and perform the applicable SCR diagnostic tests using PACCAR DAVIE4 after installation.

How to Identify an OEM Part

Identify the Genuine PACCAR SCR Outlet Catalyst Module by its factory identification label or stamped OEM part number on the housing.

Why Buy 2191864PE From Wisent Parts Center?

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    Warranty

  • Genuine Parts

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  • 30-Day Returns

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Warranty & Return Information
Warranty Information

Wisent Parts offers a 1-year 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.