BMW Keyless Entry Not Working (Here Is How To Fix)

bmw keyless entry not working

Have you ever wondered why BMW keyless entry is not working and how to fix that? Well, we got you covered.

In the modern world of automotive technology, keyless entry systems have become increasingly popular among car owners. These systems provide convenience and ease of use, allowing drivers to unlock and start their vehicles without physically inserting a key.

However, like any other electronic system, keyless entry systems can encounter issues that prevent them from functioning properly. In this comprehensive troubleshooting guide, we will explore the common problems associated with BMW keyless entry systems and provide step-by-step solutions to help you get your system working again.

1. Understanding BMW Keyless Entry Systems

1.1: How Do BMW Keyless Entry Systems Work?

BMW keyless entry systems operate using a combination of radio frequency identification (RFID) technology and unique vehicle identification numbers (VINs).

When you approach your BMW vehicle with the key fob in your possession, the system recognizes the fob and sends a signal to unlock the doors.

The key fob contains a small battery that powers the system and allows for communication between the fob and the vehicle.

1.2: Components of a BMW Keyless Entry System

A BMW keyless entry system consists of several components, including the key fob, the control module, and the door locks.

The key fob contains the necessary electronics to transmit signals to the control module, which is responsible for processing these signals and activating the door locks.

The door locks, in turn, receive the signals from the control module and unlock or lock the doors accordingly.

2. Common Problems with BMW Keyless Entry Systems

2.1: Key Fob Battery Issues

One of the most common problems with BMW keyless entry systems is a dead or weak key fob battery. If your key fob battery is low on power, it may not be able to transmit a strong enough signal to communicate with the control module.

This can result in the keyless entry system not working properly. To resolve this issue, follow these steps:

  1. Replace the key fob battery with a new one. Make sure to use the correct battery type specified by BMW for your specific key fob model.
  2. Test the key fob to see if the keyless entry system is now functioning as expected.

2.2: Signal Interference

Signal interference can also cause BMW keyless entry systems to malfunction. This interference can be caused by various factors, such as nearby electronic devices or physical obstructions.

To troubleshoot signal interference issues, try the following steps:

  1. Move away from any electronic devices that may be causing interference, such as cell phones, laptops, or wireless routers.
  2. Check for any physical obstructions between the key fob and the vehicle, such as metal objects or walls. Move closer to the vehicle and try again.

2.3: Control Module Malfunction

In some cases, the control module responsible for processing the signals from the key fob may malfunction.

This can result in the keyless entry system not working correctly. To address control module malfunctions, follow these steps:

  1. Perform a hard reset of the control module by disconnecting the vehicle’s battery for a few minutes. This will reset the module and clear any temporary issues.
  2. If the problem persists, contact a BMW dealership or qualified technician to diagnose and replace the control module if necessary.

Read also >> BMW Charging Malfunction (Here Is How To Fix)

3. Additional Troubleshooting Tips

3.1: Check for Faulty Door Locks

Faulty door locks can also cause BMW keyless entry systems to malfunction. If the doors do not lock or unlock properly using the keyless entry system, there may be an issue with the door locks themselves. To troubleshoot this problem, try the following steps:

  1. Manually lock and unlock the doors using the physical key.
  2. If the doors lock and unlock properly with the physical key, the issue may lie with the keyless entry system. Refer back to the previous sections for further troubleshooting steps.
  3. If the doors still do not lock or unlock correctly, there may be a mechanical issue with the door locks. Contact a BMW dealership or qualified technician for further inspection and repair.

3.2: Verify Key Fob Synchronization

Sometimes, BMW keyless entry systems may require re-synchronization between the key fob and the control module. To verify key fob synchronization, follow these steps:

  1. Place the key fob in the ignition and turn it to the “On” position.
  2. Press and hold the lock button on the key fob for approximately 10 seconds.
  3. Release the lock button and turn the ignition off.

3.3: Seek Professional Assistance

If the troubleshooting steps outlined in this guide do not resolve the issue with your BMW keyless entry system, it is recommended to seek professional assistance.

Contact a BMW dealership or a qualified automotive technician who specializes in BMW vehicles. They will have the necessary expertise and diagnostic tools to identify and resolve complex keyless entry system problems.


In conclusion, BMW keyless entry systems offer convenience and ease of use for vehicle owners. However, they may encounter issues that prevent them from functioning properly.

By following the troubleshooting tips outlined in this guide, you can address common problems and get your BMW keyless entry system back in working order.

Remember to always refer to the vehicle’s owner’s manual for specific instructions and consult a professional if needed.

Enjoy the convenience of your BMW keyless entry system once again!

Steve P.

Steve is an automotive technician, technical writer, and Managing Editor. He has held a lifelong passion for cars, with a particular interest in cars like the Buick Riviera. Steve is based in Boise, Idaho.

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