my Volkswagen Golf Eighth Generation (2020-present) makes a weird noise when starting

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shorts.
• Ensure the vehicle is parked on a level surface with the parking brake engaged.

2. Inspect and Replace the Starter Motor

• Tools Needed: Socket set, torque wrench, ratchet, multimeter, safety gloves.
• Remove the engine cover (if applicable) to access the starter motor.
• Disconnect the electrical connections from the starter motor, noting their positions.
• Remove the mounting bolts securing the starter motor using the socket set.
• Gently pull the starter motor out of its housing.
• Inspect the starter gear for wear; replace if necessary.
• Install the new starter motor by reversing the removal steps, ensuring all bolts are torqued to the manufacturer's specifications.

3. Check and Replace the Battery

• Tools Needed: Multimeter, battery terminal cleaner, socket set.
• Test the battery voltage with a multimeter; it should read around 12.6 volts when fully charged.
• If the voltage is low or the battery shows physical signs of damage (bulging, leaking), replace the battery.
• Clean battery terminals and connections with a terminal cleaner before reconnecting.
• Reconnect the battery terminals securely.

4. Inspect and Replace the Serpentine Belt (if needed)

• Tools Needed: Serpentine belt tool or socket set.
• Visually inspect the serpentine belt for cracks, fraying, or signs of wear.
• If the belt is damaged, release tension from the tensioner and remove the belt.
• Route the new serpentine belt according to the belt routing diagram (usually located under the hood).
• Ensure the belt is properly seated on all pulleys and reapply tension.