Changing the Battery in Your Mini Key Fob

The key fob is a handy option to lock and unlock your car from the distance. It can also trigger the panic button on your vehicle, which can scare off burglaries.

You can repair your fob by following a few easy steps. First, check that the battery is in good condition. Remove the battery from the ignition, then press the lock button swiftly three times.

Battery

The easiest way to fix the battery on your key fob is to replace it. The key fob uses a tiny coin-shaped battery (CR2032, the CR2025) that can be located in the majority of general stores, home improvement stores, and auto parts stores. Use a brand new battery. Old batteries can harm the circuit boards and are no longer useful.

Start by opening the fob. It might be tight, but with the help of a flat screwdriver you will be able split the halves. Then, you can insert the screwdriver in the seam on both sides of the fob, and then lift up a couple of clips to secure it. They are very easy to break so proceed slowly and with care.

Reassemble the fob after replacing the battery and examine it to determine if the device works as it should. If it doesn't function after pressing the button several times, ensure that the contacts are clean. You could also try it using a spare key fob to determine if the issue is isolated to a specific key. If not, then there could be another reason that caused the key fob to not work. It could be a worn button, for example. This would cause the button to work a few times but not continuously.

Interference

The key fob is powered by a small transmitter that transmits signals of a short range to a receiver located in your car. Its function is to allow your car to recognize the key fob and open its doors as you approach it and start when you push the ignition button.

Interference can interfere with communication. For instance, if are using your second-generation Apple Pencil charged while you're holding the fob, it could stop you from unlocking the car (via iGeneration).

Other electronic devices that operate on the same frequency can also interfere with the fob's signal. Garage door openers or tire pressure monitoring devices may be affected. It is also possible that an RF transmitter in your home could interfere with the fob's signal, however, this is difficult to diagnose without an examination by a professional.

It's possible that your fob needs to be reprogrammed. This requires the transmitter inside the fob to be recognized by the receiver in your Mini and a unique code is assigned to each pairing. The fobs will typically need to be reprogrammed when they're removed or replaced, or when you purchase a replacement or, in certain cases when the battery is changed. To reprogram a fob, follow the instructions in your owner's manual or visit a dealer for assistance.

Faulty chip

Modern electronic key fobs provide the convenience and functionality of traditional manual keys, but they can also be more susceptible to damage. One of the most common issues is a malfunctioning chip that stops your device from functioning properly. Luckily, this is usually an simple fix.

If your car key fob isn't able to turn on, it could be the result of a defective chip. The issue can be fixed by replacing the battery that is inexpensive and simple to find at an hardware store or big-box retailer. Make sure you purchase the correct battery compatible with your model of car to avoid recurring issues.

The fob should also not be exposed to water, or soapy residue. Water is a common cause of corrosion, which can interfere with the circuit board. If this is the case, you will need to clean the circuit board by using isopropyl or electronic cleaner prior to putting in an entirely new battery.

It is a good idea to test the operation of the fob prior to operating the vehicle. Test the voltage of the new battery using an voltmeter and make sure it's secure. If not, you may have to replace the entire remote chip. A qualified dealership technician can help you determine 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 each order and we also provide a support line for Mini Keys all of our customers.

Often, your mini cooper keys-key fob will malfunction or cease to function completely. It can be a frustrating experience when the car won't start. You have to wait until it gets back to normal. However, reprogramming the key fob could be the answer and it is easy to do.

First, ensure that the battery in your key fob is functional and hasn't had to be replaced. Once a new battery is installed, it can't be reprogrammed and it would have to be replaced.

Once the key fob is programmed, it can connect with the vehicle and control the functions it has, such as the radio, the air conditioning system, as well as the sunroof and windows. It is also able to activate the comfort access feature which means that the door for the driver will be locked and closed automatically when you enter the vehicle, or the seats will adjust to let you in or out. The key fob can then change the settings for the climate control and mirrors according to your preferences and even adjust the radio.