Mini Replacement Key
It may be that your key fob needs an upgraded battery. It also might need reprogramming to work with your specific vehicle.
Typically, you can avail this service from your dealer. You can also get in touch with a locksmith. They will make use of your vehicle's VIN to make a replacement key for you.

Battery
Over time, the battery in your key fob can run low and stop working. It's simple to replace it at home. Simply open the fob, take out the battery that was in it and replace it with a new one. You'll have to put in some effort, but in the end you'll be back on the road. If you require an internal key blade for your key fob purchase it at the time of ordering.
Programming
The key that comes with your mini Cooper has a special chip inside that communicates with your car to open the doors and start the engine.
bmw mini key to always have a backup, whether it's to replace a key or in the event that you misplace yours. You might be able find a common key at a hardware store but you will need a locksmith to program it to your car to ensure it works.
Coding is a complex and time-consuming procedure. It requires taking the CAS module out of the car, and soldering it to get the key data. The new key will then need to be programmed into your vehicle by an authorized dealer or a professional BMW/MINI coder. This is why most locksmiths will turn the job away. If you are able, try a local BMW/MINI coder instead. They will make use of an ID44 chip programmer to connect to the car's BC1 module and read the existing EWS (immobilizer) code from the old key to program the new one.
VIN Number
Every vehicle has a VIN (Vehicle Identification Number) number that is unique to the vehicle. This VIN number is comprised of 17 characters which may appear random, but they have specific meanings. They are designed to guard cars from fraud and theft.
The first three characters of the VIN indicate where the vehicle was built and its manufacturer. These are referred to as the World Manufacturer Identifier or WMI codes. The characters 4-8 provide more information about the vehicle including its model and the features. The ninth character is an identification code that confirms the VIN as valid. The last character is the year that the vehicle was manufactured.
You will find the VIN number on a variety of locations in your car. It is usually printed on an image that is visible when you glance at the windshield or dashboard. It is also visible on the driver's side door jamb if you open that door and examine the inside.
If you're thinking of purchasing a used car, make sure that you verify the VIN number prior to signing the contract. A VIN decoder can assist you in understanding the VIN number, so that you can avoid purchasing damaged or stolen vehicles. VINs have been standardised since 1981. However, before 1981, vehicles used a different format, which could be difficult to understand.
Lockout Service
As opposed to traditional car keys, modern keys are fitted with a transponder chipset that can disable the vehicle's immobiliser system. The chips are incorporated into the key and transmit a signal to the vehicle's CAS which starts the engine. The advantage of this feature is that it can to stop thieves from using stolen keys to start your vehicle.
As a sub-division of BMW, MINI has a reputation for upholding the highest standards of fashion and technology. You can replace keys for any MINI model, whether old or new. However this service is typically designed for drivers who own vehicles that work with key fobs.
It could be that your key fob requires an upgrade in battery. If it takes longer to unlock or lock the door than usual it is a typical indication. If this is the case, you should contact one of the locksmiths in your area to have your fob's battery replaced. The process should take about 10 to 30 minutes to complete. This is a much faster and cheaper option than replacing the key fob in its entirety. This service is also available if you've locked yourself out of your vehicle and need assistance getting back inside.