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Changing the Battery in Your Mini Key Fob

The key fob allows you to lock and unlock your vehicle from some distance. It can also activate your vehicle's panic button which will deter burglaries.

If your device stops working, it can be fixed by following a few simple steps. Make sure that the battery is brand new. Then, try taking it from the ignition by pressing the button to lock three times quickly.

Battery

The battery you use in your key fob is one the easiest fixes. The device uses a small coin-shaped 3V battery (CR2032 or CR2025) that is generally easily found in general stores and home improvement stores, and a few auto parts stores. Use a new battery. Old batteries can damage the circuit boards and become less useful.

You'll want to start by opening the fob. It may be a bit tight, but with the aid of a flat screwdriver you will be able to break the two halves. Attach the screwdriver to the seams on both sides of the fob and lift the clips which hold it in place. They can easily break so be cautious and work slowly.

Reassemble the fob after replacing the battery, and check to see if it does what it is supposed to. If it doesn't work try pressing the button several times and ensuring whether the contacts are clean. You can also test the fob with a spare to determine if the issue is confined to your key. If it is not, there could be another reason behind the key fob not to work. For example it could be because the button is worn out. This would only make the button function occasionally and not always.

Interference

The key fob has a small transmitter to send an audio signal that is short-range to a receiver within your vehicle. Its purpose is to allow your car to recognize the fob and unlock its doors when you come close to it and start when you hit the ignition button inside.

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

Other electronic devices operating on the same frequency can also interfere with the fob's signal. Garage door openers and tire-pressure monitoring devices can also be affected. It is also possible that an RF receiver inside your home could interfere with the fob's signal but this would be difficult to pinpoint without the assistance of a qualified test.

It's possible that your fob needs to be reprogrammed. This requires the transmitter in the fob to be recognized by the receiver in your Mini, and a unique code is used for each pairing. Fobs typically need to be reprogrammed when they're removed or replaced, or when you purchase a replacement or, in rare cases it's when a battery has been changed. To reprogram a fob, follow the instructions in the user's manual of your device or go to a dealer to seek assistance.

Faulty chip

Modern electronic key fobs provide more convenience and functionality than traditional manual keys. However, they also are more prone to damage. One of the most frequent problems is a faulty chip that will prevent the fob from functioning properly. This is usually a simple fix.

If your fob is constantly not turning on your car, this could be an indication that the chip is defective. It is often possible to resolve the issue by simply replacing the battery. This is a cost-effective and easy solution that can be purchased at any hardware store or large retailer. Be sure to buy the right replacement battery compatible with your model of car to avoid recurring issues.

The fob should not be exposed to water or soapy residue. Water can cause corrosion, which can cause problems with the circuit board. If this is the case it is necessary to clean the board with isopropyl and electronic cleaner prior to installing the new battery.

It is a good idea to test the functionality of the fob prior driving the vehicle. Verify the voltage of the new battery with an voltmeter to make sure it is safe. If not, you might require replacing the entire remote chip. A certified technician from the dealership can help you choose the best solution for your car.

Reprogramming

We have a replacement slim key fob to replace the old key fob. It works the same as the original and comes with full fitting instructions with every purchase. We also offer our customers with a helpline.

Sometimes, your mini key fob can fail or stop working completely. This can happen due to various reasons and can be extremely difficult as your car key mini cooper won't start and you're forced to wait for a time before you can drive again. However, reprogramming your key fob might be the solution and is easy to accomplish.

The first thing to do is ensure that the key fob battery is in good working order and that it has not been replaced. Once a new battery is installed, it will not be reprogrammed and would need to be replaced.

Once the key fob is programmed, it will be capable of communicating with the vehicle and control all its functions including the air conditioning, radio and even the sunroof and windows. The key fob can also be programmed to enable comfort access, which implies that the driver's doors will open and close automatically when you enter the vehicle or that the seats be able to move to help you get into and out. The key fob can then allow you to adjust the climate control settings and mirrors to your preference, and can even alter the radio's settings.