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Greetings, everyone. I am unable to access my BMW 420i as both of my key fobs are unresponsive. Additionally, I saw that the window remained slightly open even after locking the vehicle. Furthermore, my valet key is also ineffective. I would really appreciate any assistance. Thank you.

Does the emergency key blade have the capability to manually open the driver's door? Is there any rotation of the barrel while attempting to spin it?

The barrel rotates, however fails to unlock the door.

It seems that the vehicle's battery is fully depleted. Attempt to use the emergency key again, making many tries. If there is still no success, it will be necessary to remove the bonnet cable.

However, the alarm remains activated. Is it the situation when the battery is completely depleted?

I have successfully opened the bonnet. I have installed a battery pack, but the key fob is still unable to unlock the device. Do you have any suggestions or ideas?

I had a vehicle with a battery that experienced a short circuit, rendering it incapable of being jump-started. Is there any other solution that is effective? Did the alarm ring when you opened the bonnet? I would connect a battery charger to it and allow it to charge for a few hours. A Ctek smart charger has the capability to do simple battery testing, which may help in ruling out any issues with the battery.

If the battery is not depleted, then it is necessary to forcefully gain access to the interior in order to perform a fault code scan. If you have a length of rigid wire, or if necessary, contact a professional locksmith. What is the voltage present on the jump start terminals?

The emergency keys are designed to engage a stop mechanism, requiring more force to activate. Attempt it once again.

Understood, I appreciate your input. I will attempt the suggested solution. However, I have one further question: If I forcefully enter, would I be able to deactivate the alarm system and start the vehicle's operation?

Attempted to use the valet key once again, but the door remains inaccessible.