why does my Volkswagen Golf MK7 (2015-2019) make a clicking noise when starting

Volkswagen Golf MK8.5 (2024-Present)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

577 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix the clicking noise when starting your Volkswagen Golf MK7 (2015-2019). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Electrical

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems to avoid shock or short circuits.
•Allow the engine to cool before working on the starter motor.

Symptoms

•Clicking noise from the engine bay when turning the key
•Engine does not crank or turn over
•Dashboard lights may dim or flicker
•Battery warning light illuminated
•Possible intermittent power issues with electrical components

Diagnostic Steps

1
Check the battery voltage using a multimeter; it should read at least 12.6 volts when fully charged.
2
Inspect battery terminals for corrosion or loose connections.
3
Test the starter motor by attempting to bypass it with a jumper wire.
4
Use an OBD-II scanner to check for any relevant fault codes.
5
Inspect the ignition switch for proper operation.
6
Check the condition of the starter relay and fuse.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•Multimeter
•Socket set
•Wrench set
•Jumper wires
•OBD-II scanner

Parts Required

•New battery (if applicable)
•New starter motor (if applicable)
•Fuses/relays (as needed)

Related Faults

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Diagnostic Steps

1
Check the battery voltage using a multimeter; it should read at least 12.6 volts when fully charged.
2
Inspect battery terminals for corrosion or loose connections.
3
Test the starter motor by attempting to bypass it with a jumper wire.
4
Use an OBD-II scanner to check for any relevant fault codes.
5
Inspect the ignition switch for proper operation.
6
Check the condition of the starter relay and fuse.

Solution

1. Preparation

Gather tools: Multimeter, socket set, wrench set, jumper wires, OBD-II scanner.
Ensure the vehicle is in park (automatic) or neutral (manual) and the parking brake is engaged.
Disconnect the negative battery terminal to prevent electrical shorts.

2. Battery Inspection and Replacement

Inspect Battery Condition
- Remove the battery terminals, starting with the negative terminal.
- Clean any corrosion from the terminals and cable ends using a wire brush.
Test Battery Voltage
- Reconnect the battery terminals and measure voltage with a multimeter.
- If voltage is below 12.6 volts, replace the battery.
Replace Battery (if necessary)
- Remove the battery hold-down bracket using a socket wrench.
- Carefully lift out the old battery and replace with a new one, ensuring correct polarity.
- Reattach the hold-down bracket and secure it properly.

3. Starter Motor Inspection and Replacement

Locate the Starter Motor
- The starter is typically located near the engine's transmission bell housing.
Remove Starter
- Disconnect the wiring harness from the starter motor.
- Remove the mounting bolts securing the starter using a socket set.
- Carefully pull the starter out of its housing.
Inspect Starter
- Check for signs of wear or damage on the starter gear and housing.
Replace Starter (if necessary)
- Install the new starter motor by reversing the removal steps.
- Ensure all connections are tight and secure.

4. Electrical System Check

Inspect Starter Relay and Fuses
- Locate the fuse box and check the starter fuse for continuity.
- Replace any blown fuses.
Test Starter Relay
- Swap the starter relay with a similar relay from the fuse box to check functionality.