As a BMW owner, you rely on your remote key to unlock your car, start the engine, and more. So, when your key stops working, it can be frustrating and even leave you stranded.
One of the most common issues owners face is an error message of BMW remote key not detected.
In this article, we will investigate the causes of this problem and provide solutions to help you get back on the road.
Why Does BMW Remote Key Not Detected?
Why is my key fob not being detected?
A BMW key car fob not working may not be seen for various reasons such as a weak battery, a broken car battery, programming issues, an immobilizer problem, use of a wrong key, a faulty brake switch, a problem with the push-start button, or interference.
Key Fob Battery/Weak Car Battery
The key fob battery powers the remote key to transmit a signal to the receiver in the automobile. The remote key might not be able to connect to the car if the battery is low or dead.
Similarly, a weak or dead automobile battery can also bring the car key not detected error notification.
A poor car battery may not power the receiver, preventing communication of the BMW remote control display key.
Broken Key
Why does my car say key not detected? If broken or damaged, the remote key cannot communicate with the car’s receiver.
The electronic key’s ability to interact with the automobile may be hampered in this case.
Programming Problem
When your car says key fob not detected, this can be due to a programming problem. For the remote key to connect with the car’s receiver, it must be properly configured.
The key is unable to send a signal to the device once it is lost or is incorrectly programmed, which would cause a warning message.
Immobilizer
The immobilizer system is a security feature that prevents unauthorized access to the car. When the immobilizer is activated, it may prevent the remote key from being detected.
The immobilizer is activated when the car key is inserted, and if the key is not recognized, the immobilizer system will not allow the car to start.
Wrong Key
Using the wrong key can also trigger the “BMW remote key not detected” error message.
If the key is not programmed for the specific car, it may not be able to communicate with the car’s receiver.
Hence, using the correct key programmed for the particular vehicle is crucial.
Brake Switch Issue
Why is my car saying key not detected? A broken brake switch may also render the remote key useless. Before the automobile may be started, the brake switch must be depressed.
Whenever the brake switch malfunctions, the auto might not detect the key fob, and an error message can show.
Start Button
The remote key can not be recognized if the start button is broken or not operating properly.
The key fob is used to turn on the automobile’s engine, and if the start button isn’t functioning properly, the car cannot detect the key.
Interference
The absence of the remote key can also be brought on by interference from other electrical equipment or communications.
Although this is a less frequent culprit, it can occur in places with much interference.
Under these circumstances, the key’s signal may be masked by electrical signals from other gadgets, making it challenging for the car’s receiver to recognize it.
How To Fix A BMW Remote Key Not Detected?
If your BMW remote key is not detected, there are several things you can do to try and fix the problem before contacting a BMW specialist. Here are some steps to follow:
Change The Battery
When you see the error notice “BMW key not recognized,” check the battery first.
It might not be able to transmit a key fob signal to the receiver in the automobile if the key fob battery is empty or dead. This issue may be quickly fixed by changing it.
Examine The Button
Over time, the remote key’s button may get jammed or broken, making it harder for the key to contact the receiver in the automobile.
Therefore, make sure the switch is operating properly by inspecting it.
Examine The Battery Connector Terminals
The battery connector terminals might also corrode, affecting the remote key’s signal. If required, inspect the terminals for deterioration and sanitize them.
Also, tighten those terminals properly for secure connection.
Examine The Comfort Access Antenna
Check whether the antenna on your BMW’s comfort access function is broken or obstructed. To unlock and start the automobile, the antenna must be able to pick up the remote key’s signal.
Dry The Key Fob
The remote control key might not work as it should if it gets water damage. Before attempting to use the key fob once more, remove the battery and completely dry it.
Avoid Any Signal Interferences
The error “BMW remote key not recognized” might also pop up due to electromagnetic interference from other gadgets or communications.
To prevent signal interference, keep your smart key away from other electronics, especially those that produce wireless signals.
Examine The Immobilizer System
The remote key may not be recognized if the immobilizer system is turned on. To activate the immobilizer system, consult the owner’s handbook or ask a BMW expert for help.
Reprogram
Reprogramming the wireless key could come in handy should none of the aforementioned measures succeed.
Following the directions in the owner’s handbook or hiring a BMW expert for you are both viable options.
How Can I Program The Bmw Key Fob Replacement?
After buying a new keyfob, you must still program the replacement key for your BMW:
- Use your current key or fob to unlock your automobile.
- Place the key fob into the starting slot or up against the mark on the side of the steering wheel column.
- Hold the start/stop button until the no-key warning goes away.
- To start your automobile, depress and remove the start/stop button.
As the Comfort Access function in the E-series automobiles only stores the last two keys in their memory storage, you might need to encrypt your car to remove the previous key record before using it.
FAQs
Why Won’t The BMW Key Fob Function Immediately After Changing The Battery?
Occasionally, a smart key’s battery can be changed to restore functionality immediately. Otherwise, it could have been reset when the battery was changed.
After reprogramming, your car’s computer will be instructed to delete all currently approved keys from its list.
If all other backup keys also cease functioning, this may be confirmed.
You have three options for programming it: DIY using the owners manual, with a locksmith, or by contacting your nearby dealer.
Is BMW Key Hackable?
Yes, BMW key fobs can be hacked.
Thieves can use specialized tools to intercept and copy the signal transmitted by the key fob or use relay theft to amplify the signal and steal the car without needing the physical damage.
However, you can always take steps to protect yourself, such as keeping your key fob in a signal-blocking pouch and being cautious about where you park your car.
BMW is also continually working to improve the security of its key fobs and vehicles to make them less vulnerable to hacking.
Conclusion
If you’re experiencing a “BMW remote key not detected” issue, don’t panic. There are several reasons why this error message appears, ranging from a dead battery to a faulty key fob.
By following the troubleshooting steps mentioned in this blog post, you can determine the root of the problem and find a solution that works for you.
If you’re still having problems after applying these solutions, it’s best to contact a BMW specialist for further assistance.