Cars & Vehicles Auto Parts & Maintenance & Repairs

How to Change a Battery on a 1993 BMW 318i

    • 1). Open the trunk and lift up the right side of the trunk liner to expose the battery.

    • 2). Disconnect the negative battery cable by loosening the bolt with an 8-mm or 10-mm wrench and lift it off of the battery terminal. The negative battery terminal has a "-" symbol next to it.

    • 3). Remove the positive battery cable from the battery using the same method described in Step 2.

    • 4). Unbolt the battery strap and pull the battery out of the holder. Take care when lifting the battery as it is heavy.

    • 5). Scrape both battery cable connectors with a wire brush to remove any corrosive materials that may have formed. This ensures a good connection with the new battery.

    • 6). Place the new battery in the battery holder with the positive and negative terminals in the same position as the old battery.

    • 7). Secure the battery to the holder by wrapping the battery strap around the battery and tightening the bolt.

    • 8). Connect the positive battery cable to the positive terminal and then the negative battery cable to the negative terminal.

    • 9). Replace the trunk liner, close the trunk and start the car to confirm the battery is connected properly and working.

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