Changing the Battery in Your Mini Key Fob
The key fob can be a convenient method to lock and unlock your car from a distance. It also allows you to activate the panic button on your car to deter burglaries.
If your device ceases to function you can fix it by following a few steps. First, ensure that the battery is fresh. Remove the battery from the ignition, then press the lock button fast three times.
Battery
The easiest way to fix the battery of your key fob is to replace it. The fob has a tiny coin-shaped 3V battery (CR2032 or CR2025) that is usually easy to find in general stores, home improvement shops, and even some auto parts stores. You should use a new battery. Old batteries can cause damage to the circuit boards and become less useful.
Begin by removing the fob. It might be a bit tight but with the aid of a flat screwdriver you will be able to break the two halves. Then, insert the screwdriver in the edges of the fob to raise a couple clips holding it in place. These can be easily damaged so be cautious and work slowly.
Reassemble the fob after replacing the battery and examine it to determine if the device does what it is supposed to. If it doesn't work try pressing the button several times and verifying that the contacts are clear. You could also try it with another key fob to determine whether the issue is specific to the specific key. If it isn't the case, there could be another reason for why your key fob isn't functioning. For instance, it could be that the button is worn out. This will only cause the button to work at times, not always.
Interference
The key fob is powered by a tiny transmitter that transmits the signal in a short distance to a receiver in your car. Its purpose it to allow your vehicle to recognize the key fob and open its doors as you approach it and start when you push the ignition button.
The problem is, interference can sometimes hinder that communication. For instance, if you are using your second-generation Apple Pencil charged while you're holding the fob, it can stop you from unlocking your car (via iGeneration).
Other electronic devices that utilize the same frequency as the fob might interfere with its signal. Garage door openers and tire-pressure monitoring devices may be affected. It's possible that an RF transmitter within your home could be interfering with the fob's signal, although this would be difficult to identify without an examination by a professional.
It's possible that your fob simply needs to be reset. This procedure requires the transmitter inside your fob to be recognized by the receiver inside your Mini and a unique code is used for each pairing. Fobs need to be reprogrammed after they are disconnected or replaced, after you purchase a new one and, in some instances, when the battery is replaced. Follow the instructions in your owner's manual to program a key fob, or ask a dealer for help.
Chips that aren't working
Modern electronic key fobs provide greater convenience and efficiency than traditional manual keys. However, they are also more prone to damage. One of the most frequent problems is a faulty chip that prevents the fob from functioning properly. Fortunately, it's usually an simple fix.
If your fob is always not turning on your car, it is a sign that the chip has become damaged. The issue can usually be repaired by replacing the battery which is cheap and easy to find at an hardware store or big-box retailer. To avoid any further issues ensure that you purchase an appropriate battery for the car model you have.

The fob should also not be exposed to water, or soapy residue. The presence of water can cause corrosion, which could cause issues with the circuit board. If this is the case, you'll need to clean it using isopropyl alcohol, or an electronic cleaner prior to putting in a new battery.
After the battery has been replaced, it is a good idea to test the function of the fob prior to driving the car. Examine the voltage of new battery using the help of a voltmeter to confirm that it's safe. If not, it may be necessary to replace the entire chip inside the remote. A certified technician from a dealer can assist in determining the best solution for your vehicle.
Reprogramming
We have a brand new replacement slim key fob available to replace your old one, it works exactly the same way as the original key fob, complete fitting instructions are included with every order. We also have a helpline for all of our customers.
Often, The Key Lab -key fob will begin to malfunction or stop working completely. It can be frustrating when your car won't start. It is necessary to wait until it is able to start again. Reprogramming the keyfob is a straightforward solution.
The first step is to ensure that the battery in the key fob is in good condition and that it has not been replaced. Once a new key fob battery is installed, it can't be reprogrammed. It will have to be replaced.
Once the key fob has been programmed, it can connect with the vehicle and manage all its functions such as the radio as well as the air conditioning system and even the windows and sunroof. It can also activate the comfort access feature that means that the driver's door will be locked and closed automatically when you enter the vehicle, or the seats will move up and down to let you in and out. The key fob is able to adjust the radio, mirrors and climate control settings to your preference.