Standard Ignition AC504 Idle Air Control Valve

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Standard Ignition AC504 Idle Air Control Valve

Brand	Standard Ignition AC504
Gaskets Included	Yes
Hardware Included	No
Fits	Ford, Mazda, and Mercury · 49 vehicles

Precision-ground valve components. Ensure accurate flow for consistent idle control.

High-grade materials. Built for prolonged life and dependable performance.

Idle air control valve. Regulates airflow in the fuel injection system.

Cross-references HOLSTEIN 2IAC0025, T Series AC504T and 1F2020660 for the same application. See all 13.

$99.88Free shipping

In stock · usually ships same day before 1pm CST

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Step 2 — Quantity

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Free returns within 60 days if it doesn't fit when fitment is verified.

Not what you need? See all Idle Air Control Valve options

Idle Air Control Valve for Ford and Mazda

Standard Ignition AC504 is an idle air control valve for select Ford Ranger, Ford Focus, Ford EcoSport, Mazda B2300, and Mercury Marauder applications. It is built with precision-ground valve components to support accurate airflow control at idle, helping restore stable engine operation in the vehicles listed below.

Key Features

Precision-ground valve components for accurate flow control
Manufactured with high-grade materials for durability and consistent performance
Gaskets included for installation
1-port, 2-terminal design
Standard Ignition AC504 for fuel injection system idle air control service

Product Details

This idle air control valve is part of Standard Ignition’s emissions control and fuel delivery lineup, backed by the company’s long history in the automotive aftermarket since 1919. The AC504 is engineered for direct replacement service on select Ford Ranger and Mazda B2300 models, along with additional Ford Focus, Ford EcoSport, and Mercury Marauder applications. Standard Ignition AC504 is built to deliver controlled idle airflow using precision-machined internal components and durable materials for dependable operation.

This part cross-references Holstein 2IAC0025 for the same application.

What It Helps Fix

Unstable or fluctuating idle speed
Stalling when coming to a stop
Idle speed that is too high or too low
Rough idle after startup
Airflow control issues related to the idle air control circuit

Installation Notes

Verify connector style, port count, and terminal count before installation.
Use the included gasket to help ensure a proper seal.
Inspect the throttle body and intake passage for carbon buildup before replacing the valve.
Confirm vehicle application by year, make, and model before ordering.

Quality Assurance

Standard Ignition manufactures emissions control components with in-house process control from parts to finished product. The AC504 is produced with durable materials and precision-ground valve components to support consistent idle control in the listed Ford and Mazda applications.

Vehicle Fitment

Fits 2001-2012 Ford Ranger, N/A
Fits 2001-2010 Mazda B2300, N/A
Fits 2010 Mazda B2300, N/A
Fits 2003-2008 Mazda B2300, N/A
Fits 2004-2007 Ford EcoSport, N/A
Fits 2003-2007 Ford Focus, N/A
Fits 2005-2007 Ford Focus, N/A
Fits 2003 Ford Focus, N/A
Fits 2004-2005 Ford EcoSport, N/A
Fits 2004 Mercury Marauder, N/A

This part fits 49 vehicles

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

Year	Make	Model	Liters	Cylinders	Position	Notes
2012	Ford	Ranger	2.3L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2011	Ford	Ranger	2.3L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2010	Ford	Ranger	2.3L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2010	Mazda	B2300	2.3L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2010	Mazda	B2300	2.3L	L4	N/A	Compatible with various car models.
2009	Ford	Ranger	2.3L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2009	Mazda	B2300	2.3L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2008	Ford	Ranger	2.3L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2008	Mazda	B2300	2.3L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2008	Mazda	B2300	2.3L	L4	N/A	Compatible with various car models.
2007	Ford	EcoSport	2.0L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2007	Ford	Focus	2.0L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2007	Ford	Focus	2.3L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2007	Ford	Focus	2.0L	L4	N/A	Compatible with various car models.
2007	Ford	Focus	2.3L	L4	N/A	Compatible with various car models.
2007	Ford	Ranger	2.3L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2007	Mazda	B2300	2.3L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2007	Mazda	B2300	2.3L	L4	N/A	Compatible with various car models.
2006	Ford	EcoSport	2.0L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2006	Ford	Focus	—	—	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2006	Ford	Focus	2.0L	L4	N/A	Compatible with various car models.
2006	Ford	Focus	2.3L	L4	N/A	Compatible with various car models.
2006	Ford	Ranger	2.3L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2006	Mazda	B2300	2.3L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2006	Mazda	B2300	2.3L	L4	N/A	Compatible with various car models.
2005	Ford	EcoSport	2.0L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2005	Ford	EcoSport	2.0L	L4	N/A	Compatible with various car models.
2005	Ford	Focus	—	—	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2005	Ford	Focus	2.0L	L4	N/A	Compatible with various car models.
2005	Ford	Focus	2.3L	L4	N/A	Compatible with various car models.
2005	Ford	Ranger	2.3L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2005	Mazda	B2300	2.3L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2005	Mazda	B2300	2.3L	L4	N/A	Compatible with various car models.
2004	Ford	EcoSport	2.0L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2004	Ford	EcoSport	2.0L	L4	N/A	Compatible with various car models.
2004	Ford	Focus	2.3L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2004	Ford	Ranger	2.3L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2004	Mazda	B2300	2.3L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2004	Mazda	B2300	2.3L	L4	N/A	Compatible with various car models.
2004	Mercury	Marauder	4.6L	V8	N/A	Compatible with various car models.
2003	Ford	Focus	2.3L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2003	Ford	Focus	2.3L	L4	N/A	Compatible with various car models.
2003	Ford	Ranger	2.3L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2003	Mazda	B2300	2.3L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2003	Mazda	B2300	2.3L	L4	N/A	Compatible with various car models.
2002	Ford	Ranger	2.3L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2002	Mazda	B2300	—	—	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2001	Ford	Ranger	2.3L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
2001	Mazda	B2300	2.3L	L4	N/A	Primary application for specific vehicle models ~ Idle Air Control Valve
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Directly replaces or cross-references 13 part numbers

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

HOLSTEIN — 2IAC0025T Series — AC504T1F20206601S7Z9F715AA2-167893-167894J106673-48735061819239404ACVB10015CX1773IAC56