How to change BMW Remote Key Battery?

VVDI2 BMW can support to program BMW EWS,BMW CAS1-CASE4+,BMW FEM Key,and xhorsevvdi.com website we sell some BMW keys,here we introduce how to change bmw key battery,take  Smart Key Fob for BMW CAS4 CAS4+ System 1 3 5 7 Series Keyless Entry Transmitter 315Mhz as an example.

bmw key

 

1.Press the button on back,and take out key blade.

bmw cas4 key bmw cas4 key

2.Use the key blade insert in another hole,open the back cover.

bmw cas4 key

bmw cas4 key

3.Then remove out old battery.

 

bmw cas4 key

bmw cas4 key

4.Replace with new battery.

bmw cas4 key

5.Put back the cover,and insert key blade back.

6.Other BMW Key

3 Button Smart Card for BMW 315Mhz/433Mhz

3 Button Smart Card for BMW 433Mhz PCF7953P / HITAG PRO / 49 CHIP BMW 9337240-01

3+1 Button Smart Key for BMW 434MHZ/315MHZ for BMW F Series X5 X6 CAS4+/FEM/BDC BMW Key

bmw key

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