2003 Ford Mustang Engine Control Modules (ECM)
Keep Your 2003 Ford Mustang in Top Shape with Quality Engine Control Modules (ECM)
Whether you’re repairing or upgrading your Engine Control Modules (ECM), using high-quality parts is key to keeping your 2003 Ford Mustang looking sharp and performing at its best. At Advance Auto Parts we carry a wide selection of dependable options, including Engine Control Module Connectors, Engine Control Module Relays, and Body Control Computers. Whether you’re replacing a damaged part or enhancing your truck’s style and protection, you’ll find exactly what you need to get the job done right.
Competitive Prices and Extensive Inventory
The average price for a 2003 Ford Mustang Engine Control Modules (ECM) at Advance Auto Parts is around $103.91, with a range that starts at $62.99 and goes up to $166.99. With 4 options in stock from 3 trusted brands, finding the right fit is easy. Popular picks like Carquest Multi-Purpose Relay, RAA1257 and Holley EFI EFI ECU Bracket – HP/Terminator/Terminator X, 554-157 start at just $62.99 and offer a great balance of form and function.
Explore Related Parts
While you’re upgrading or replacing your Engine Control Modules (ECM), don’t forget to check out other key components like Engine Gaskets and Seals and Engine Timing Parts. At Advance Auto Parts, we’re here to help you keep your 2003 Ford Mustang in peak condition, inside and out.
Find Your Specific 2003 Ford Mustang Engine Control Modules (ECM)s
Looking for the perfect Engine Control Modules (ECM) for your 2003 Ford Mustang? You’re in the right place. Below, you’ll find links to various types of Engine Control Modules (ECM) that fit your vehicle. At Advance Auto Parts, we offer only the highest quality OEM and aftermarket Engine Control Modules (ECM)s, ensuring durability and a precise fit for your Ford Mustang. Whether you’re driving a 2003 model or another popular model year like
1992,
1993,
1994,
1995,
1996,
1997,
1998,
1999, and
2000, we’ve got you covered. Purchasing Engine Control Modules (ECM)s from Advance Auto Parts is a smart choice, giving you access to trusted brands and parts built to perform. Below, you’ll find links to various types of Engine Control Modules (ECM)s that fit your vehicle.
Essential 2003 Ford Mustang Engine Control Modules (ECM)
Cardone – Cardone Remanufactured Relay Control Module, 73-70013 (Part No.73-70013)
from
$119.99
CARDONE Remanufactured Relay Control Modules are engineered for quick installation and no comebacks. Each unit is engineered to meet or exceed O.E.M performance. All modules are 100 percent computerized tested and resolder of critical components, as well as 100 percent replacement of common ware components, ensuring superior electrical connections.
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Cardone – Cardone Remanufactured Relay Control Module, 73-70012 (Part No.73-70012)
from
$166.99
CARDONE Remanufactured Relay Control Modules are engineered for quick installation and no comebacks. Each unit is engineered to meet or exceed O.E.M performance. All modules are 100 percent computerized tested and resolder of critical components, as well as 100 percent replacement of common ware components, ensuring superior electrical connections.
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Holley EFI – Holley EFI EFI ECU Bracket – HP/Terminator/Terminator X, 554-157 (Part No.554-157)
from
$116.99
Introducing Holley EFI ECU mounting bracket, allowing you to safely mount your ECU under the seat of a Foxbody Mustang.
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Carquest Premium – Carquest Multi-Purpose Relay, RAA1257 (Part No.RAA1257)
from
$62.99
Relays are electrical switches used to convert a small electrical load into a circuit capable of handling a high amperage load. Computers and small switches are not designed to carry the higher amperage requirement of a circuit that may have an electric motor, solenoid, or high amperage lighting fixture. Within a relay are contacts that are controlled with electromagnetism, when the circuit switch commands the device on or off, magnetism will pull or release the contact arm closing or opening the contacts within the relay that carry the voltage.
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Popular 2003 Ford Mustang Engine Control Modules (ECM) Categories
Most Popular Engine Control Module Connector for 2003 Ford Mustangs
Enhance your 2003 Ford Mustang with this popular Engine Control Module Connector we have in stock, for $116.99.
Holley EFI – Holley EFI EFI ECU Bracket – HP/Terminator/Terminator X, 554-157 (Part No.554-157)
from
$116.99
Introducing Holley EFI ECU mounting bracket, allowing you to safely mount your ECU under the seat of a Foxbody Mustang.
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Best-Selling 2003 Ford Mustang Engine Control Module Relay
Upgrade your Mustang with our best-selling Engine Control Module Relay.
Carquest Premium – Carquest Multi-Purpose Relay, RAA1257 (Part No.RAA1257)
from
$62.99
Relays are electrical switches used to convert a small electrical load into a circuit capable of handling a high amperage load. Computers and small switches are not designed to carry the higher amperage requirement of a circuit that may have an electric motor, solenoid, or high amperage lighting fixture. Within a relay are contacts that are controlled with electromagnetism, when the circuit switch commands the device on or off, magnetism will pull or release the contact arm closing or opening the contacts within the relay that carry the voltage.
See More
Top-Quality Body Control Computers for 2003 Ford Mustangs
Choose a high-quality OEM or aftermarket Body Control Computer for Ford Mustangs and enjoy top-notch performance from $119.99.
Cardone – Cardone Remanufactured Relay Control Module, 73-70012 (Part No.73-70012)
from
$166.99
CARDONE Remanufactured Relay Control Modules are engineered for quick installation and no comebacks. Each unit is engineered to meet or exceed O.E.M performance. All modules are 100 percent computerized tested and resolder of critical components, as well as 100 percent replacement of common ware components, ensuring superior electrical connections.
See More
Cardone – Cardone Remanufactured Relay Control Module, 73-70013 (Part No.73-70013)
from
$119.99
CARDONE Remanufactured Relay Control Modules are engineered for quick installation and no comebacks. Each unit is engineered to meet or exceed O.E.M performance. All modules are 100 percent computerized tested and resolder of critical components, as well as 100 percent replacement of common ware components, ensuring superior electrical connections.
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FAQs for 2003 Ford Mustang Engine Control Modules (ECM)s
What are the best-selling Engine Control Modules (ECM)s for 2003 Ford Mustangs?
Out of 4 Engine Control Modules (ECM)s that fit 2003 Ford Mustangs, the following parts are the top sellers:
- Carquest Multi-Purpose Relay, RAA1257 (12473018) – $62.99
- Holley EFI EFI ECU Bracket – HP/Terminator/Terminator X, 554-157 (50307401) – $116.99
What’s the price range for 2003 Ford Mustang Engine Control Modules (ECM)?
The prices of Engine Control Modules (ECM) for the 2003 Ford Mustang range from $62.99 up to $166.99 for the most premium parts.
What is the average price of an Engine Control Modules (ECM) for a 2003 Ford Mustang?
The average price for Engine Control Modules (ECM)s for the 2003 Ford Mustang is $103.91. Keep in mind the variety of part types within our Engine Control Modules (ECM) category, where you are likely to find a wide range of prices across a variety of parts and components.
Does Advance Auto Parts sell Engine Control Modules (ECM) for other Ford Mustang model years?
What are the cheapest Engine Control Modules (ECM) for my 2003 Ford Mustang?
The cheapest 2003 Ford Mustang Engine Control Modules (ECM) we carry are:
- Carquest Multi-Purpose Relay, RAA1257 (12473018) – $62.99
- Holley EFI EFI ECU Bracket – HP/Terminator/Terminator X, 554-157 (50307401) – $116.99
- Cardone Remanufactured Relay Control Module, 73-70013 (10008803) – $119.99
- Cardone Remanufactured Relay Control Module, 73-70012 (10008800) – $166.99
Does Advance Auto Parts sell Engine Control Modules (ECM) for any other 2003 Ford models?
Yes. We stock Engine Control Modules (ECM) for 9 other popular 2003 Ford models. Some of the most popular are 2003 Escape Engine Control Modules (ECM), 2003 Escort Engine Control Modules (ECM), 2003 Explorer Engine Control Modules (ECM), 2003 Explorer Sport Trac Engine Control Modules (ECM), and 2003 E-350 Super Duty Engine Control Modules (ECM).
What are the top-rated Engine Control Modules (ECM) that fit the 2003 Ford Mustang?
The one 2003 Ford Mustang Engine Control Modules (ECM) we have in stock is the Carquest Multi-Purpose Relay, RAA1257. It costs $62.99.
What types of Engine Control Modules (ECM) do you sell for my 2003 Ford Mustang?
As of 8/2/26, these are some of the most in-demand types of Engine Control Modules (ECM) for a 2003 Ford Mustang:
Can I get help with 2003 Ford Mustang Engine Control Modules (ECM) orders?
Contact our customer support team by chat or phone, through the help desk page, where you can find instant answers about Ford Engine Control Modules (ECM) and more.
What is your return policy for Ford Mustang Engine Control Modules (ECM)?
Advance Auto Parts keeps returns simple. For new Ford Mustang Engine Control Modules (ECM) and accessories, your online orders can be returned, in their original condition, within 45 days. For requirements, see the returns page.