why is my Toyota Highlander XU70 (2020-Present) making a whirring noise

Solution

1. Preparation

• Tools Required: OBD-II scanner, jack and jack stands, wheel chocks, socket set, torque wrench.
• Safety Warnings: Ensure the vehicle is on a flat surface and securely lifted before working underneath.

2. Inspect and Replace Serpentine Belt

• Sub-steps:
  1. Turn off the engine and disconnect the battery.
  2. Remove the engine cover if applicable.
  3. Use a socket wrench to relieve tension from the serpentine belt tensioner.
  4. Remove the serpentine belt and inspect for cracks or fraying.
  5. If damaged, replace with a new belt (specify OEM part number).
  6. Reinstall the new serpentine belt, ensuring proper routing, and tighten the tensioner.

3. Check and Replace Wheel Bearings

• Sub-steps:
  1. Raise the vehicle and remove the wheel using a socket set.
  2. Inspect the wheel hub for any signs of wear or damage.
  3. If the bearing is faulty, remove the hub assembly and replace the bearing with a new one (specify OEM part number).
  4. Reassemble the hub and wheel, and torque to the manufacturer's specifications.

4. Fluid Check and Replacement

• Sub-steps:
  1. Check engine and transmission fluid levels; top off if low.
  2. If fluids are dirty, perform a fluid change using manufacturer-recommended fluids.
  3. Dispose of old fluids properly.