Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD2004MUSTANG BASE, 2D COUPE, 3.9 6, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 1838 (ANTI-THEFT SYSTEM - PATS - (HYBRID))GENERAL PROCEDURESKEY PROGRAMMING USING TWO PROGRAMMED KEYS
2004 Ford Mustang Base, 2D Coupe, 3.9 6, Automatic
Key Programming Using Two Programmed Keys
2004 Ford Mustang Base, 2D Coupe, 3.9 6, AutomaticSECTION Key Programming Using Two Programmed Keys
WARNING: This page is about a different car, the 2007 Mercury Mariner and 2007 Ford Escape. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
This procedure works only if 2 or more programmed ignition keys are available and it is desired to program additional key(s). If 2 keys are not available, refer to Key Programming Using Diagnostic Equipment .
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.