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How to change battery on 323i BMW?

Step 1: Park your vehicle in a safe location with the engine off.

Step 2: Open your trunk.

Step 3: Locate the positive and negative battery terminals. Open the hood of your vehicle.

Step 5: Disconnect the negative terminal.

- Start by disconnecting the negative terminal of your battery.

- Use a 10mm socket wrench to loosen the bolt holding the negative cable in place.

- Once the bolt is loose, carefully remove the cable from the terminal and set it aside.

Step 6: Disconnect the positive terminal.

- Next, disconnect the positive terminal of your battery.

- Use a 10mm socket wrench to loosen the bolt holding the positive cable in place.

- Once the bolt is loose, carefully remove the cable from the terminal.

- Be sure to keep these two cables separate, as touching them together can cause a short-circuit.

Step 7: Remove the battery hold-down clamp.

- Next, you need to remove the clamp holding the battery in place.

- Use a 13mm socket wrench to loosen the bolt holding the clamp in place.

- Once the bolt is loose, remove the clamp and set it aside.

Step 8: Remove the old battery.

- You can now remove the old battery from your vehicle.

- Start by lifting the battery out of its compartment from one side.

- Then, carefully remove it from the trunk.

- Be sure to dispose of the old battery properly.

Step 9: Clean the battery tray.

- Before installing the new battery, you should clean the battery tray.

- Use a damp cloth to wipe away any dirt or debris.

- Be sure to dry the tray completely before proceeding.

Step 10: Place the new battery in the trunk.

- Start by placing the new battery into place in the battery compartment.

- Ensure that the positive and negative terminals are facing the correct direction.

Step 11: Secure the new battery.

- Use the same clamp that you removed earlier to secure the new battery in place.

- Tighten the bolt using a 13mm socket wrench.

Step 12: Connect the positive terminal.

- Next, you need to connect the positive terminal of the battery.

- Start by placing the positive cable onto the positive terminal of the battery.

- Then, use a 10mm socket wrench to tighten the bolt holding the cable in place.

Step 13: Connect the negative terminal.

- Finally, you need to connect the negative terminal of your battery.

- Start by placing the negative cable onto the negative terminal of the battery.

- Then, use a 10mm socket wrench to tighten the bolt holding the cable in place.

Step 14: Close the hood and trunk of your vehicle.