Compatible with: BMW E83 X3, E53 X5, E9X, 5-series E60 / E61 530i / 530xi / E39, Z4 E85 E86 Roadster Coupe. Please, notice that to replace the battery you'll have to disassemble the Key Fob. Replacement also requires some technical abilities. If You are not sure that can correctly disassemble the Key Fob and install the battery, we recommend you to ask a specialist to help you. The pins are located at 90 degrees! You would need to have some soldering skills in order to replace the battery.