Buy Genuine Paccar Engine Backpressure Valve w/Actuator - wisentpartscenter.com

Description

The Genuine PACCAR Engine Backpressure Valve 2459938 with Electronic Actuator is designed PACCAR MX-13 12.9L diesel engines. This electronically controlled assembly regulates exhaust backpressure to support engine braking, exhaust gas management, and proper emissions system operation.

Fitment / Applications

  • Engine Manufacturer: PACCAR
  • Engine: MX-13 12.9L
  • Emissions Configuration: EPA17
  • Application Years: 2018–2025
  • Component Type: Electronic Exhaust Backpressure Valve / Exhaust Brake Valve
  • Coolant Connections: Bolt-on coolant line configuration

What's Included

  • 1 × Engine Backpressure Valve Assembly with Integrated Electronic Actuator

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

Purpose of the Part

The engine backpressure valve controls exhaust gas flow by adjusting a valve in the exhaust system. It helps improve engine braking, manage exhaust temperatures, and support the engine's emissions control system during different operating conditions.

Issue Symptoms / When to Replace

Possible signs of backpressure valve problems may include:

  • Reduced or inconsistent engine braking performance
  • Check Engine light or backpressure valve-related fault codes
  • Reduced engine power or poor acceleration
  • Exhaust aftertreatment or regeneration-related warnings

These symptoms may also be caused by other exhaust, electrical, or engine control issues. Proper diagnosis is recommended before replacing the valve.

Brand Information

PACCAR developed its MX engine platform with advanced electronic engine management and integrated braking technology. The MX-13 engine braking system coordinates the exhaust backpressure valve with the variable geometry turbocharger to control braking performance. This technology reflects PACCAR's focus on combining engine efficiency, exhaust management, and braking capability in heavy-duty diesel applications.

Installation Notes
  • Cooling System: Ensure actuator coolant connections are properly secured and leak-free.
  • Valve Operation: Check for exhaust soot restrictions and verify valve operation using PACCAR DAVIE diagnostic software after installation.

How to Identify an OEM Part

Look for the PACCAR name cast directly into the metal valve housing and the actuator identification label displaying the part number and Pierburg markings.

Why Buy 2459938 From Wisent Parts Center?

  • 1 Year
    Warranty

  • Genuine Parts

    Authentic OEM parts

  • 30-Day Returns

    Conditions apply

Shop with confidence

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.