[Premium Replacement Shell] This is the cover. Its quality is the same as the original key, even better than the original one. Before installation, please open the back cover of the switch, which has screws. [DIY Replacement] Take the internal electronics (including immobilizer chip/transceiver) from your original remote and put them into our key shell, you are ready! Instructions and screwdrivers are also available, you can do it yourself, very easy and simple. The remote looks the same as the pictures show, this flip key cover is suitable. This keyless remote protective case fits for BMW 5 Series 7 2010-2011 BMW 550i GT 2010-2011 BMW 550i GT xDrive 2011 BMW X3 2011 BMW 535i for 201 BMW 52 8i 8i for 20 11 BMW 535i GT xDrive etc and other models with the same specifications with the battery holder listed in the section below... [Save Your Money] We have a screwdriver with instructions, make sure to complete the installation [Please Attention] The key shell cannot be closed tightly, it is due to installation error. Please contact us in this case and we will teach you how to solve it