Changing the Battery in Your Mini Key Fob

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

If your device stops working, it can be fixed with a few easy steps. Make sure that the battery is new. Then, you can try removing it from the ignition by pressing the lock button three times rapidly.

Battery

The simplest way to fix the battery in your key fob is to replace it. The fob has a tiny coin-shaped 3V battery (CR2032 or CR2025) that is usually accessible in general stores and home improvement stores, as well as some auto parts stores. Be sure to use a new battery -- old batteries are often no longer good for anything and could damage the circuit board.

Start by removing the fob. It may be tight, but with the help of a flat screwdriver, you should be able to separate the halves. Fit the screwdriver in the seams on both sides of the fob and lift the clips that hold it in place. These are easily broken, so be careful and work slowly.

After replacing the battery take the fob apart and examine it to determine if everything is functioning as it should. If it's still not working Try pressing the button a few times and checking that the contacts are in good order. It is also possible to test it using a spare key fob in order to determine whether the issue is confined to a particular key. If not then there could be a different reason why the key fob isn't working. It could be a worn button, for instance. This will only make the button work occasionally and not all the time.

Interference

The key fob is a tiny transmitter to send an audio signal that is short-range to a receiver in your vehicle. Its primary function is to allow your car to recognize the fob, and open its doors when you come close to it and to start when you press the ignition button in.

The problem is, interference can occasionally interfere with the transmission. If you charge your second-generation Apple Pencil while holding the fob (via iGeneration) it could stop you from unlocking the vehicle.

Other electronic devices that operate on the same frequency may also interfere with the fob's signal. This includes garage door openers and tire pressure monitoring systems. It is also possible that an RF transmitter within your home may be interfering with the fob's signals, but this would be difficult to diagnose without a professional test.

Your key fob could need to be reprogrammed. This requires the transmitter in your fob to become recognized by the receiver inside your Mini and a distinct code is used for each pairing. The fobs will typically need to be reprogrammed when they're disconnected or replaced, when you buy a new one or, in rare cases when the battery is changed. To reprogram a fob, follow the directions in the user's manual of your device or ask a dealer for assistance.

Chip that isn't working

Modern electronic key fobs offer convenience and function over traditional manual keys, but they are also more susceptible to being damaged. A faulty chip is one of the most frequent issues that can stop the key fob from working properly. It is usually a simple fix.

If your fob is constantly not turning on your car, it is an indication that the chip is malfunctioning. It is generally possible to fix the problem by simply replacing the battery. This is a cost-effective and easy solution that can be purchased at any hardware store or retailer. To avoid problems in the future, make sure you purchase a battery that is compatible with your car model.

It is also essential to ensure that the fob isn't exposed to soapy or water residue. Water can cause corrosion, which can cause problems with the circuit board. If this is the situation you'll need to wash the board with isopropyl and electronic cleaner prior to installing a new battery.

It is a good idea to test the functionality of the fob prior driving the vehicle. Using a voltmeter, check the voltage of the new battery to determine whether it's at an acceptable level. If not, you might need to replace the whole remote chip. A trained technician from a dealership will assist you in determining the best solution for your vehicle.

Reprogramming

We offer a replacement mini keys slim key fob to replace the old key fob. It works exactly as the original, and the full fitting instructions are included with every purchase. We also offer our customers with a helpline.

Often, your mini key fob can malfunction or cease to function completely. This is due to various reasons and it can be very frustrating as the vehicle will not start and you'll have to wait for a while until you can drive again. Reprogramming the keyfob is an easy solution.

The first step is to ensure that the battery for the key fob is in good shape and that it has not been replaced. When a new key fob battery has been installed, it cannot be reprogrammed. It will have to be replaced.

Once the key fob has been programmed, it will be capable of communicating with the vehicle and control all its functions, including radio, air conditioning and even the sunroof and windows. It can also activate the comfort access feature which means that the driver's door will automatically lock and shut when you enter the vehicle, or the seats will adjust to get you in and out. The key fob will then adjust the mirrors, radio and climate control settings to your preference.