why does my Toyota Highlander Fourth Generation (2020-present) make a rattling noise over bumps?

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Ensure the vehicle is parked on a flat surface and the ignition is off.
• Use wheel chocks to prevent movement and disconnect the battery for safety.

2. Inspect and Tighten Suspension Components

• Tools Required: Socket set, torque wrench
• Check all suspension bolts and nuts for tightness.
  • Use a torque wrench to tighten them to the manufacturer's specifications (consult service manual for specific torque values).
• If any components are found to be loose or damaged, proceed to replace or repair them.

3. Replace Worn Suspension Components

• Tools Required: Jack and jack stands, socket set, torque wrench
• If any shock absorbers or struts are worn:
  • Lift the vehicle using a jack and secure it with jack stands.
  • Remove the wheel to gain access to the suspension.
  • Disconnect the old shock/strut by removing the mounting bolts.
  • Install the new shock/strut, ensuring it is aligned correctly.
  • Torque the new bolts to the specified values.
  • Reinstall the wheel and lower the vehicle.

4. Check and Secure Loose Interior Components

• Tools Required: Screwdriver set
• Inspect the interior trim and panels for any loose parts.
  • Tighten or replace any screws or clips that may be missing.
  • Ensure that all interior components are secure to eliminate rattling noises.