How to Change the Battery on a BMW 3 Series


1. Park your BMW, turn it off completely, and engage the parking brake.
2. Open the hood of the car using the release switch by the steering wheel, or with the latch on the hood itself.
3. Remove the brackets holding the battery in place using the screwdriver.
4. Remove the terminals from the old battery. You may need to use the wrench to get them off. Remove the negative ('-') terminal first, then the positive ('+') terminal.
5. Take out the old battery, and dispose of it safely.
6. Install the new battery, and replace the terminals, first the positive, then the negative.
7. Turn the car on to check the battery works.
8. Replace the brackets, and close the hood.