dylankyang

How To Change a BMW X3 Battery

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check the CCA (Cold Cranking Amps) and ah – I think mine is 105 ah AGM
- Defines the ability to start the engine in cold weather (my replacement is 950)
in the trunk (turn plastic knobs)
Remove negative terminal (10mm)
- Optional: Wrap in a towel to prevent it from touching anything
Remove positive terminal (10mm under the cap in the top left corner)
Remove 2nd positive terminal clip(13mm in the middle)
remove the positive metal clip by grabbing underneath and it should loosen the other side
- Optional: Remove 3 cable connections
Remove middle clamp bolts
- 13mm at the top
- 13mm at the bottom but needs an extender
Remove the 13mm bracket in the top right corner at the bottom of the battery
Remove vent tube
Reverse steps to install

After the battery is replaced plug your obd reader in
open up bimmerlink
click 12v and there should be “replace battery” at the bottom
select your battery replacement type
- mine is a different one so I just put the new numbers in 95 ah

I think that’s it. Let’s give it a shot!