How do I properly maintain the electrical system in my BMW M9?

I've been having some issues with the electrical system in my BMW M9 and I want to make sure I'm taking the right steps to keep it in top condition. What maintenance should I be performing and how often?

Regularly check and tighten all connections and cables to ensure no loose connections or corrosion is causing issues. This should be done at least once a year, but more frequently if you notice any issues while driving.

Make sure to keep your battery charged and replace it every 5-7 years or as needed. A dead battery can cause a lot of issues with your electrical system.

Consider upgrading to a higher quality battery or installing a battery maintainer to ensure a longer lifespan for your battery and less strain on the electrical system.