BMW Key Fob Unlocks But Will Not Start Car

The BMW key fob is a device that allows the owner to unlock and start their car without having to use a traditional key. The key fob uses a wireless signal to communicate with the car, and it is powered by a battery.

If the key fob is not working, it may be because the battery is dead, the key fob is not programmed to the car, or there is a problem with the car’s electrical system.

How do i reset my BMW key fob?

There are a few ways to reset your BMW key fob. The most common way is to use the BMW key fob reset tool .

This tool can be found online or at your local BMW dealership . To use the tool, you need to first remove the battery cover on the key fob.

Then, insert the tool into the battery compartment and turn it until the red light turns off. Finally, replace the battery and reattach the battery cover.

Can a bad key fob cause car not to start?

The short answer is no, a bad key fob will not cause a car not to start. A key fob is simply a remote control for your car.

If the battery is dead or the key fob is lost, the car will not start. However, if the key fob is not properly programmed into your car, it may not work at all.

In this case, you would need to take your car to a mechanic to have the key fob programmed.

Can a low battery in key fob cause car not to start?

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A low battery in a key fob can cause a car not to start. If the battery in the key fob is low, the car’s computer may not be able to access the key fob’s battery to start the car.

Why is my car not starting with key fob?

There are a few potential reasons why your car may not be starting with the key fob. The most common issue is a dead battery.

If the battery is completely dead, the car will not start at all. If the battery is just weak, the car may start but not stay running.

Another common issue is a problem with the key fob itself. If the key fob isn’t receiving a signal from the car, it won’t work to start the car.

Finally, there may be a problem with the car’s keyless entry system. If the sensor that registers when you press the door unlock button isn’t working, the car won’t start with the key fob.

Can you start a BMW without the key fob?

The answer to this question is a bit complicated. BMW does not actually sell a key fob that is required to start the car, you must use the BMW keyless entry system.

This system allows you to unlock and start the car simply by holding down the unlock button on the car’s keyless entry transmitter and entering the car’s four-digit PIN code.


If your BMW key fob unlocks your car but will not start the engine, there are a few potential causes. One possibility is that the key fob battery may be dead.

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Another is that there may be an issue with the car’s starter system. If you are having this issue, it is best to take your car to a qualified BMW mechanic for diagnosis and repair.