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

Solution

1. Preparation

• Gather tools and parts required for the repair.
• Ensure the vehicle is parked on a flat surface and engage the parking brake.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Replace Serpentine Belt

• Tools Required: Socket set, torque wrench, belt tensioner tool.
• Sub-steps:
  1. Remove the engine cover if applicable.
  2. Locate the serpentine belt tensioner and release tension using the belt tensioner tool.
  3. Remove the old serpentine belt from the pulleys.
  4. Inspect pulleys for damage or wear; replace if necessary.
  5. Install the new serpentine belt according to the routing diagram.
  6. Reapply tension to the belt and ensure it is seated correctly on all pulleys.

3. Check and Top Off Fluids

• Tools Required: Funnel, fluid containers.
• Sub-steps:
  1. Locate the power steering reservoir and inspect fluid level.
  2. Add the appropriate power steering fluid if low.
  3. Check the transmission fluid level using the dipstick while the engine is running.
  4. Add transmission fluid if necessary, ensuring it meets manufacturer specifications.
  5. Inspect and top off differential fluid if applicable.

4. Inspect Wheel Bearings

• Tools Required: Jack, jack stands, wheel chocks, socket set.
• Sub-steps:
  1. Lift the vehicle using a jack and secure it with jack stands.
  2. Remove the front wheels and inspect wheel bearings for play or noise.
  3. Rotate the hub by hand; listen for grinding or roughness.
  4. Replace any faulty bearings with new units following manufacturer specifications.