How to Install a Battery on a 1990 BMW 735


1. Open one of the rear doors to access the rear seat area.
2. Push forward on the rear seat, and lift it up. This unhooks it from the floor.
3. Tilt the seat up as far as it will go to expose the battery compartment.
4. Loosen the bolt on the negative battery terminal. Lift the cable away from the terminal.
5. Loosen and remove the connector on the positive battery terminal. Move the positive cable away from the battery.
6. Lift the old battery out of the compartment.
7. Place the new battery into the compartment. Position it the way the old battery was positioned.
8. Connect the positive cable to the positive battery terminal. Tighten the bolt on the connector with the wrench.
9. Connect and secure the negative cable on the negative battery terminal.
10. Tilt the rear seat back into its original position, and close the rear door.