How to troubleshoot a BWM engine that won't start?

I have a BWM car and recently it won't start. The lights and radio are working fine, but when I turn the key, it just makes a clicking noise. What could be the problem and how can I fix it?

First, check your battery connections and make sure they are clean and tight. If they are loose or dirty, it can prevent your car from starting. You can clean the connections with a wire brush and tighten them with a wrench.

If your battery is more than 3 years old, it might be time to replace it. A weak or dead battery can also cause your car not to start. You can take your battery to a local auto parts store to have it tested.