2022-2024 Expedition & Navigator Bluetooth Module: Fixing Phone As A Key Failure

Symptoms of a Failing Bluetooth / Phone As A Key Module

When the Bluetooth module in a 2022-2024 Ford Expedition or Lincoln Navigator begins to fail, you'll notice issues ranging from minor annoyances to a complete loss of keyless functionality. Because this module is central to the Phone As A Key (PaaK) system, its failure directly impacts how you access and operate your vehicle.

• Phone As A Key (PaaK) Stops Working: This is the most significant symptom. You may receive a "No Key Detected" message on the instrument cluster even when your phone is inside the vehicle. You'll be unable to unlock the doors by approaching the vehicle or start the engine with just your phone, forcing you to use the numerical keypad on the door and the backup start passcode inside.
• Intermittent or No Bluetooth Connectivity: The vehicle may not appear in your phone's list of Bluetooth devices, or it may fail to connect automatically. You might find yourself having to manually pair your phone every time you enter the vehicle.
• Frequent Disconnections: For both audio streaming and the PaaK function, the connection may drop randomly. This can be especially frustrating during phone calls or when relying on the PaaK feature.
• Poor Audio Quality: While on calls or streaming music, you might experience static, echoes, or audio that cuts in and out, which can point to a hardware issue within the module.

Initial Diagnostic Steps

Before assuming the module is faulty, Ford and Lincoln recommend several troubleshooting steps, as the issue can often be with the phone or app software. Try these in order:

1. Basic Phone Troubleshooting: Ensure your phone's Bluetooth is on. Try moving the phone closer to the center console area, as signal can be blocked. Restart the FordPass or Lincoln Way app on your phone. Finally, toggle your phone's Bluetooth off and then on again.
2. Vehicle Key Cycle: Turn the vehicle completely off. Open and close the driver's door to ensure all modules power down. Wait two minutes for the instrument cluster to go dark, then restart the vehicle and see if the connection is restored.
3. Re-Pairing: Delete the vehicle from your phone's Bluetooth settings and delete your phone from the vehicle's SYNC 4 screen. Then, attempt to re-pair the device from scratch.
4. Master Reset: As a last resort, you can perform a Master Reset of the SYNC system through the settings menu. This will erase all personal data, including paired phones and saved addresses, but can sometimes resolve persistent software glitches.

If none of these steps resolve the issue, a hardware failure in the Bluetooth module is likely.

Known Issues, TSBs, and Recalls

As of mid-2026, there are no specific recalls or widespread Technical Service Bulletins (TSBs) from Ford or the NHTSA that directly address a systemic failure of the Phone As A Key or Bluetooth module (part number MU5T-14G617-AM) in the 2022-2024 Ford Expedition and Lincoln Navigator. While these vehicles have been subject to recalls for other components like brake lines and software for other modules, the PaaK system appears to be reliable, with failures being isolated incidents rather than a widespread defect.

Buying a Used Bluetooth Control Module

Purchasing a used OEM module is a cost-effective way to solve this problem. Because this is a highly integrated, security-related part, aftermarket versions are not available. A used OEM module provides the same performance and reliability as a new one, provided you follow these steps.

What to Inspect:

• Connector Pins: Carefully inspect the pins in the electrical connector port. They should be straight, clean, and free of any green or white corrosion, which would indicate water damage.
• Casing Integrity: Check the plastic casing for any cracks, signs of melting, or pry marks. A damaged case could indicate it was removed improperly or exposed to extreme heat.
• Verify the Part Number: The part number is printed on a white label on the module. Do not rely on the seller's description alone; verify the number on the part itself matches MU5T-14G617-AM.

Replacement and Programming

Physically replacing the Bluetooth module is a straightforward job. However, completing the repair requires a mandatory programming step that can only be performed by a Ford or Lincoln dealership.

Module Location

The Bluetooth Control Module (Remote Function Actuator) is located on the driver's side of the vehicle, mounted high up in the dash, just above and to the right of the gas pedal assembly. Accessing it requires removing the gas pedal.

Step-by-Step Replacement (Physical Swap)

1. Disconnect the Battery: Use an 8mm or 10mm socket to disconnect the negative terminal of the vehicle's 12V battery.
2. Remove the Gas Pedal Assembly: Using a 13mm socket with an extension, remove the three bolts holding the gas pedal assembly in place. You do not need to disconnect it electrically; simply move it aside.
3. Access the Module: You will now have a clear view of the module.
4. Disconnect and Remove: Press the release tab on the electrical connector and pull it from the module. Then, using an 8mm socket, remove the two bolts securing the module to its bracket and remove it from the vehicle.
5. Install the New Module: Mount the replacement module and tighten the two 8mm bolts. Reconnect the electrical connector.
6. Reinstall Gas Pedal and Battery: Re-secure the gas pedal assembly with its three 13mm bolts. Reconnect the negative battery terminal.

Cost Comparison

The costs below are estimates and can vary by location and supplier. The most significant variable is the dealership's labor rate for programming.

Frequently Asked Questions (FAQ)