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Dorman 911-155 Secondary Air Injection Check ValveOE Quality 60-Day Returns
Part #: 911-155

Dorman 911-155 Secondary Air Injection Check Valve

N/A
13 vehicles fit this part
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Fitment: Ford, Focus
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Secondary Air Injection Check Valve for Ford Focus

This Dorman secondary air injection check valve is built to match the fit and function of the original valve on specified vehicles. Designed for the 2003-2011 Ford Focus, Part Number 911-155 supports proper secondary air injection system operation with a cast aluminum body and reed valve design.

  • Direct-fit secondary air injection check valve for specified Ford Focus applications
  • Cast aluminum construction for durability
  • Reed valve design for controlled air flow in the emission system
  • Black and silver finish
  • Operating temperature range: -40C to 125C
  • Maximum pressure rating: 15 psi
  • Inlet size: 0.748 in; outlet size: 0.629 in

Detailed Product Overview

Dorman 911-155 is a secondary air injection check valve engineered for emission control service in the air injection system. It is designed to match the original valve’s fit and function on 2003-2011 Ford Focus models, helping maintain proper one-way airflow through the secondary air system. The cast aluminum housing and reed valve construction are selected for reliable performance across a wide temperature range. This part cross-references Standard Ignition DV153 for the same application.

Common Issues This Part Can Address

  • Secondary air injection check valve leakage
  • Restricted or improper air flow in the emission control system
  • Check valve wear from heat cycling and age
  • Faults related to secondary air injection system performance
  • Fitment replacement needs on 2003-2011 Ford Focus, N/A

Installation Notes and Tips

Verify inlet and outlet sizing before installation and confirm the valve orientation matches the original air injection routing. For best results, inspect connected hoses and adjoining emission components for wear, carbon buildup, or damage before installing Part Number 911-155. This part is listed for 2003-2011 Ford Focus, N/A, and should be installed on the vehicle application shown in the fitment data.

Quality Assurance

Dorman designs this secondary air injection check valve to match original fit and function and to deliver durable, reliable service in the emission control system. Part Number 911-155 is built for specified Ford Focus applications and is backed by Dorman’s product engineering standards.

BrandDorman
Part Number911-155
Color/FinishBlack and Silver
Inlet Size (in)0.748 in
MaterialCast Aluminum
Maximum Pressure Rating (psi)15
Outlet Size (in)0.629 in
Package Contents1 Secondary Air Injection Check Valve
Valve TypeReed Valve
Working Temperature Range-40C To 125C

This part fits 13 vehicles. Search below:

YearMakeModelLitersCylindersPositionNotes
2011FordFocus2.0LL4N/AProper installation of the ABS Wheel Speed Sensor is crucial for optimal performance.
2010FordFocus2.0LL4N/AProper installation of the ABS Wheel Speed Sensor is crucial for optimal performance.
2009FordFocus2.0LL4N/AProper installation of the ABS Wheel Speed Sensor is crucial for optimal performance.
2008FordFocus2.0LL4N/AProper installation of the ABS Wheel Speed Sensor is crucial for optimal performance.
2007FordFocus2.3LL4N/AProper installation of the ABS Wheel Speed Sensor is crucial for optimal performance.
2007FordFocus2.0LL4N/AProper installation of the ABS Wheel Speed Sensor is crucial for optimal performance.
2006FordFocus2.3LL4N/AProper installation of the ABS Wheel Speed Sensor is crucial for optimal performance.
2006FordFocus2.0LL4N/AProper installation of the ABS Wheel Speed Sensor is crucial for optimal performance.
2005FordFocus2.3LL4N/AProper installation of the ABS Wheel Speed Sensor is crucial for optimal performance.
2005FordFocus2.0LL4N/AProper installation of the ABS Wheel Speed Sensor is crucial for optimal performance.
2004FordFocus2.3LL4N/AProper installation of the ABS Wheel Speed Sensor is crucial for optimal performance.
2004FordFocus2.0LL4N/AProper installation of the ABS Wheel Speed Sensor is crucial for optimal performance.
2003FordFocus2.3LL4N/AProper installation of the ABS Wheel Speed Sensor is crucial for optimal performance.

* Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

This part directly replaces or is cross-referenced with the following part numbers:

3S4Z9F491ACDV153EC1357

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

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