why does my Volkswagen Golf MK7 (2015-2019) make a hissing sound when turning

Volkswagen Golf MK8.5 (2024-Present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

506 words

Problem Statement

Learn how to diagnose and fix the hissing sound when turning in Volkswagen Golf MK7 (2015-2019). Step-by-step guide with diagnostic procedures and repair instructions.

Affected Component

Steering

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.
•Allow the engine to cool before inspecting the power steering system.

Symptoms

•Hissing sound occurs specifically when the steering wheel is turned
•Difficulty in steering or increased effort needed to turn the wheel
•Fluid leakage observed near the power steering system
•Check engine or power steering warning light illuminated
•Whining noise accompanying the hissing sound when steering

Diagnostic Steps

1
Inspect the power steering fluid level and condition in the reservoir.
2
Check for visible leaks in the power steering hoses and connections.
3
Use an OBD-II scanner to check for any relevant error codes.
4
Inspect the power steering pump for signs of wear or damage.
5
Evaluate the steering rack for any unusual noises or signs of failure.
6
Test the power steering system pressure with a gauge during operation.

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

•OBD-II scanner
•Socket set
•Torque wrench
•Fluid container

Parts Required

•Power steering fluid
•Power steering hoses (if damaged)
•Power steering pump (if faulty)

Related Faults

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Symptoms

•Hissing sound occurs specifically when the steering wheel is turned

•Difficulty in steering or increased effort needed to turn the wheel

•Fluid leakage observed near the power steering system

•Check engine or power steering warning light illuminated

•Whining noise accompanying the hissing sound when steering

Diagnostic Steps

1
Inspect the power steering fluid level and condition in the reservoir.
2
Check for visible leaks in the power steering hoses and connections.
3
Use an OBD-II scanner to check for any relevant error codes.
4
Inspect the power steering pump for signs of wear or damage.
5
Evaluate the steering rack for any unusual noises or signs of failure.
6
Test the power steering system pressure with a gauge during operation.

Solution

1. Preparation

Gather necessary tools and parts.
Park the vehicle on a flat surface and engage the parking brake.
Disconnect the negative battery terminal to ensure safety.

2. Inspect and Replace Power Steering Fluid

Sub-steps:
1. Locate the power steering fluid reservoir and remove the cap.
2. If the fluid is low or dirty, drain it by removing the return hose from the pump.
3. Replace with the manufacturer-recommended power steering fluid (consult owner's manual for specifications).
4. Reconnect the hose and ensure no leaks.

3. Replace Damaged Hoses

Sub-steps:
1. Identify any damaged or leaking hoses connected to the power steering system.
2. Use a socket set to remove any clamps securing the hoses.
3. Replace the damaged hoses with new ones, ensuring proper routing.
4. Tighten all clamps securely.

4. Replace Power Steering Pump (if needed)

Sub-steps:
1. Remove the drive belt from the power steering pump.
2. Disconnect the pump from its mounting brackets using a socket set.
3. Unplug any electrical connectors and disconnect the inlet and outlet hoses.
4. Install the new power steering pump by reversing the removal steps.
5. Refill the power steering fluid and bleed the system by turning the steering wheel from lock to lock.