my Volkswagen Passat B8 (2015-2022) makes a clicking sound when starting any ideas

Solution

1. Preparation

• Gather tools: multimeter, socket set, wrench set, remote starter switch, battery terminal cleaner.
• Ensure the vehicle is in park or neutral and the parking brake is engaged.
• Disconnect the negative battery terminal for safety.

2. Battery Inspection

• Clean Battery Terminals: Use a battery terminal cleaner to remove corrosion from the terminals.
• Tighten Connections: Ensure both the positive and negative battery cables are securely attached.

3. Battery Replacement (if necessary)

• Remove Battery:
  1. Disconnect the positive terminal first, followed by the negative terminal.
  2. Remove any securing brackets or hold-downs.
  3. Carefully lift the battery out of the tray.
• Install New Battery:
  1. Place the new battery in the tray, ensuring it is properly seated.
  2. Reattach the securing brackets or hold-downs.
  3. Connect the positive terminal first, followed by the negative terminal.

4. Starter Motor Testing

• Remove Starter Motor (if needed):
  1. Disconnect the battery again before proceeding.
  2. Remove any components obstructing access to the starter motor.
  3. Unplug the electrical connector and remove the mounting bolts.
  4. Carefully pull the starter motor from its housing.
• Test Starter Motor: Use a remote starter switch to check if the motor engages when power is applied directly.

5. Reassemble and Final Checks

• Reinstall the starter motor if it is functional or replace it if faulty.
• Reconnect all components removed during the process.
• Reconnect the battery, ensuring terminals are secure.