Mini Replacement Key
If your key fob won't turn on it may be due to a new battery. It may also have to be reprogrammed in order to work with your vehicle.
Typically, you can get this service from your dealer. You can also reach out to the local locksmith. They will use the VIN number of your car to create a new key for you.
Battery
The battery in your key fob could run out and stop working over time. The replacement process is quick and easy and can be done at home. Simply open your fob, unplug the battery that was in it and snap in a new one. It will require some effort but you'll be on the road back to normal in the blink of an eye. Certain key fobs require you to purchase an internal key blade so please add that if required when you place your order.
Programming
The key that came with your Mini Cooper has a chip that communicates with the car to open the doors and turn on the engine. mini car key G28 to have a backup in case it's to replace a key or in case you lose yours. You might be able find a common key in a hardware store but you'll need an locksmith to program it to your car so it works.
The process for coding is complicated and time-consuming. It requires taking the CAS module from the car and soldering into it to obtain the key information. The new key has to be programmed by an authorized BMW/MINI dealer or professional BMW/MINI coder. Many locksmiths will not take on the job because of this. If you are able, try an independent, local BMW/MINI coder instead. They use an ID44 programmer to connect to the BC1 module in your car and read the EWS (immobilizer code) from the old key in order to program the new key.
VIN Number
Each vehicle is assigned a unique VIN number. This VIN number is comprised of 17 characters, which can appear random, but have specific meanings. They are designed to guard cars from theft and fraud.

The first three characters of the VIN indicate the place where the car was constructed and the manufacturer. These are known as World Manufacturer Identifier or WMI codes. The characters 4-8 provide more details about the car including its specifications and model. The ninth character is the security code that verifies that the VIN is valid. The last character is the year in which the vehicle was produced.
The VIN number is found in numerous places on your vehicle. The VIN number is typically printed on a sticker that you can see when you look up on the dashboard or the windscreen. You can also spot it on the driver's side of the door jamb by opening that door and looking inside.
Before you sign the contract to purchase a used vehicle, check the VIN. A VIN decoder will assist you in understanding the VIN number to avoid buying damaged or stolen vehicles. VINs are established since 1981. However, before 1981, vehicles used a different format that could be difficult for you to comprehend.
Lockout Service
Modern key fobs come with a transponder, which can disable the immobiliser system of the vehicle. These chips are contained inside the key itself and transmit a signal that is picked up by the CAS unit in the vehicle that then turns on the engine. This feature is designed to stop thieves from using stolen keys to start vehicles.
As a division of BMW, MINI has a reputation for maintaining high standards of style and technology. You can swap keys for any MINI model, whether old or new. However this service is typically designed for drivers who own cars that are compatible with key fobs.
It may be that your key fob is in need of an upgrade in battery. If it takes longer to open or close the door than it normally does, this is a common indication. If this is the situation, you should contact a local locksmith to replace the battery inside your fob. The process will take between 10 to 30 minutes to complete. This is a quicker and cheaper alternative to replacing the entire keyfob. You can also avail this service if you've locked yourself out of your vehicle and need help to get back in.