What are the symptoms of poor contact in BMW battery cables?

[AngelaFitz]

Overheated battery terminals or sparking are the most obvious symptoms of loose connections. Loose battery cables: Vibration during vehicle operation can cause electrolyte to splash out, corroding cable connections and leading to cable breakage, resulting in an open circuit. Loose battery cables place the starting circuit in an open state, preventing the starter from functioning. Preventive measures: Cables and wires from the battery to the starter may become detached or develop poor contact, especially at the starter-end wire connections, which are most affected by vehicle vibration. Regularly manually check these connection points to promptly detect potential faults.