Ford Expedition Ignition Lock Cylinder Guide (2005-2010)
Is your Expedition's key stuck or not turning? Here’s what you need to know before replacing the ignition lock cylinder.
- Failure is common and usually presents as a key that won't turn, often leaving you stranded.
- Replacement is simple if the key can turn to the 'RUN' position; otherwise, a locksmith or drilling is required.
- Aftermarket kits from Dorman include a DIY programmer, but reviews are mixed on its success.
- If you only have one key, you'll need a locksmith, a dealer, or a DIY programmer kit to get the new keys to start the truck.
Is Your Ignition Lock Cylinder Failing?
When the ignition lock cylinder in a 2005-2010 Expedition starts to fail, the signs are hard to ignore. Because this part is used every time you drive, wear and tear is the main cause of failure. The small metal pins (or tumblers) inside the cylinder wear down, leading to problems.
Common Symptoms:
- Key is Hard to Turn: You might find yourself needing to jiggle or wiggle the key to get it to turn to the 'ON' or 'START' position.
- Key Gets Stuck: The key may not turn all the way back to the 'OFF' position, preventing you from removing it.
- Complete Failure to Turn: The most common failure is when the key goes in but won't turn at all, leaving you stranded.
- Cylinder Comes Out with Key: In some 2008 models, owners have reported the entire lock cylinder assembly pulling out of the steering column along with the key.
- No Start or Intermittent Start: While less common for the cylinder itself, a worn cylinder can fail to properly engage the electronic ignition switch behind it, leading to a no-start condition.
Known Issue: Worn Tumblers
A common point of failure for the 2005-2010 Expedition is the internal tumblers wearing out. This can cause the key to feel loose, get stuck, or fail to turn. In some cases, the internal components can break apart, causing the entire cylinder to come out with the key.
Choosing the Right Aftermarket Ignition Cylinder
When replacing the ignition cylinder, you have two main choices: OEM (Motorcraft) and aftermarket (like Dorman). Your decision depends on your budget and how you plan to handle key programming.
| Brand Tier | Brand(s) | Quality & Notes |
|---|---|---|
| OEM | Motorcraft | Motorcraft is Ford's official parts brand, offering a direct replacement designed for your vehicle. 🎬 Watch: Step-by-step guide to replacing the ignition lock cylinder. These parts are built to the original specifications for fit and performance. However, a new Motorcraft cylinder will not come with keys and must be either coded to your existing keys by a locksmith or you will need new keys programmed by a dealer or locksmith. |
| Premium Aftermarket | Dorman (OE FIX Kits) | Dorman is a popular aftermarket choice and offers two main types of solutions. Some kits allow a technician to re-pin the new cylinder to match your old keys. 🎬 See how to re-pin a new cylinder to your keys. Other "OE FIX" kits come with new keys and a DIY-friendly programmer that plugs into your truck's OBD-II port to program the new keys, avoiding a trip to the dealer. Reviews for these programmer kits are mixed; many users find them easy to use, but some report failures in programming that require a locksmith anyway. |
A Note on Keys and Programming
Your Expedition uses keys with a PATS transponder chip. Simply cutting a new key is not enough; it must be electronically paired to the vehicle. If you have two working keys, you can program a third key yourself. If you only have one or zero working keys, you must go to a dealer or locksmith. This is why aftermarket kits with programmers are popular, as they can solve the "one key" problem at home, but their reliability can be inconsistent.
Frequently Asked Questions (FAQ)
Can I replace the ignition lock cylinder myself?
Yes, the mechanical replacement is straightforward for a DIYer. It involves removing the steering column shrouds, turning the key to the 'RUN' position, and using a small punch or screwdriver to depress a retaining pin from underneath. The cylinder then slides out. The main challenge is not the mechanical work, but the key programming that follows.
What do I do if my key is stuck and won't turn to the 'RUN' position?
You cannot remove the cylinder unless the key is in the 'RUN' position to release the retaining pin. If the key is completely stuck, you cannot perform the replacement. In this situation, your options are to call a mobile locksmith who may be able to pick the lock to the run position, or have the vehicle towed to a shop where they may need to drill out the old cylinder.
🎬 Watch: How to start your Ford if the key won't turn.Do I need new keys if I replace the cylinder?
It depends on the replacement part you buy. If you buy an OEM Motorcraft cylinder, a locksmith can re-pin it to work with your original keys. If you buy an aftermarket kit like the Dorman OE FIX, it will come with new keys that you must program to your vehicle using the included tool.
What is the difference between the ignition lock cylinder and the ignition switch?
The ignition lock cylinder is the mechanical lock you put your key into. The ignition switch is the electronic component located behind the lock cylinder. The cylinder's rotation moves an actuator rod that operates the switch. If your lights flicker or the truck starts and then immediately dies, you may have an issue with the switch instead of, or in addition to, the lock cylinder.
Helpful Videos
Technical Specifications
OEM Part Numbers: AU5Z-11582-B SW-6991
The key for the 2005-2010 Ford Expedition contains a PATS (Passive Anti-Theft System) transponder chip that must be programmed to the vehicle's computer.
We Have This Part in Stock
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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