why is my Volkswagen Passat B8 (2015-2022) making a whining noise while driving?

Solution

1. Preparation

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

2. Check Power Steering Fluid

• Locate the power steering fluid reservoir.
• Remove the cap and inspect fluid level; add OEM-approved fluid if low.
• If the fluid is contaminated, perform a complete flush.

3. Inspect and Replace Serpentine Belt

• Use a socket set to remove the tensioner and relieve tension on the serpentine belt.
• Inspect the belt for cracks, fraying, or glazing.
• If damaged, replace with a new OEM belt, ensuring proper routing as per the diagram.

4. Examine Transmission Fluid

• Locate the transmission dipstick; check fluid level with the engine running.
• If the fluid is low, add OEM-approved transmission fluid until the correct level is reached.
• If the fluid appears burned or contaminated, consider a transmission fluid change.

5. Inspect Wheel Bearings

• Lift the vehicle using a jack and secure it with jack stands.
• Spin each wheel by hand; listen for any grinding or unusual noises indicating worn bearings.
• If necessary, replace the wheel bearings using a bearing puller and install new bearings with appropriate torque specifications.