Experiencing issues with your 2007 BMW 750Li key fob? You’re not alone. Many BMW owners encounter problems ranging from Comfort Access malfunctions to complete key fob unresponsiveness. This guide delves into common key fob issues for the 2007 BMW 750Li and provides a step-by-step programming procedure to resync your key.
One common complaint among 2007 BMW 750Li owners is related to Comfort Access. As one forum user, “red1krr,” described, “With the fob in my pocket, only the rear drivers side door opens when pulled on. All the other doors do not.” This frustrating issue, where only some doors respond to Comfort Access while others remain locked, is not uncommon. Another user echoed this exact problem, highlighting that it’s not isolated and might point to system quirks rather than individual handle failures.
Another issue, as reported by “bmwukraine,” is the key fob ceasing to work for keyless entry and ignition, while still functioning for remote door unlocking via buttons. This suggests a potential loss of synchronization between the key fob and the car’s immobilizer system.
Fortunately, BMWs have a built-in procedure to resync key fobs, which can often resolve these types of issues. Before assuming costly repairs are necessary, try the following key fob programming procedure for your 2007 BMW 750Li:
Key Fob Synchronization Procedure for 2007 BMW 750Li:
This process is designed to re-establish the communication link between your BMW and its key fob. Follow these steps carefully:
- Enter the Vehicle: Using the key fob that is experiencing issues, get inside your 2007 BMW 750Li and close the door. Ensure your seatbelt is fastened.
- Insert the Key: Place the key fob into the designated slot in the steering column.
- Press and Hold Unlock Button: Locate the central lock/unlock button on your dashboard. Press and hold down the unlock side of this button. Note: Some users report this procedure is sensitive to pressing the correct side of the button.
- Ignition On: While still holding the unlock button, press the engine start/stop button without pressing the brake pedal. This will turn on the ignition, illuminating the dashboard indicators. Continue holding the unlock button throughout this step.
- Wait for the Gong: Keep holding the unlock button. After approximately 10 seconds, you should hear an audible “gong” sound from the vehicle. This indicates the synchronization process has begun.
- Release and Remove Key: Once you hear the gong, release the unlock button and remove the key fob from the ignition slot.
- Test the Key Fob: Exit the vehicle and use the buttons on the key fob to lock the car. Allow the car to enter sleep mode, which typically takes about 2 minutes. After this period, test the key fob’s Comfort Access and keyless ignition functionalities.
Troubleshooting Tips:
- Battery Condition: While the synchronization process is often effective, ensure the battery in your key fob is not depleted. A low battery can cause intermittent or complete failure of the key fob’s functions.
- Fuse Check: In rare cases, a blown fuse related to the central locking system or Comfort Access might be the culprit. Consult your BMW 750Li owner’s manual for fuse box diagrams and identify relevant fuses to check.
- Handle Issues: If the synchronization process doesn’t resolve Comfort Access problems, and particularly if only specific doors are affected, the door handle sensors themselves might be faulty. However, attempt the programming procedure first before considering handle replacements.
When to Seek Professional Help:
If you’ve followed the key fob programming procedure and are still experiencing issues with your 2007 BMW 750Li key fob, or if you suspect a more complex problem like faulty door handles or a deeper electrical issue, it’s advisable to consult a qualified BMW technician. They can diagnose the problem accurately and recommend the necessary repairs or replacements.
By following these steps, you can attempt to resolve common key fob issues with your 2007 BMW 750Li and potentially avoid unnecessary dealership expenses.
