my Volkswagen Tiguan makes a grinding noise when I turn the key

Solution

1. Preparation

• Gather all tools and parts needed for the repair.
• Ensure the vehicle is in a safe location with the engine off and the keys removed.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Clean Battery Connections

• Remove the positive and negative battery terminals.
• Clean the terminals and battery posts using a wire brush.
• Reattach the terminals securely, starting with the positive terminal first.

3. Replace the Starter Motor

• Tools Required: Socket set, torque wrench, screwdriver set.
• Locate the starter motor; it is typically mounted on the engine near the transmission.
• Remove any components obstructing access to the starter motor.
• Disconnect the wiring harness and solenoid connections from the starter.
• Unbolt the starter motor from its mounting location (usually 2-3 bolts).
• Install the new starter motor by reversing the removal steps; ensure to torque the bolts to the manufacturer’s specifications (usually around 30-40 Nm).
• Reconnect the wiring harness and solenoid connections securely.

4. Test the Ignition System

• Reconnect the negative battery terminal.
• Turn the ignition key to the "ON" position without starting the engine to check for any warning lights.
• Attempt to start the engine; listen for any grinding noises.