why does my Toyota Highlander Third Generation (2014-2019) make a whistling sound when driving?

Solution

1. Preparation

• Gather tools and materials.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery to avoid electrical issues.

2. Inspect and Replace Weather Stripping

• Sub-steps:
  1. Remove old weather stripping around doors and windows using a trim removal tool.
  2. Clean the surface with a solvent to ensure proper adhesion.
  3. Cut new weather stripping to size and apply firmly to the cleaned surfaces.
• Tools Required: Trim removal tool, solvent, scissors.
• Safety Warnings: Ensure the vehicle is turned off and in park mode.

3. Check and Repair Air Intake System

• Sub-steps:
  1. Remove the air filter housing to access the intake duct.
  2. Inspect all hoses for cracks or loose connections. Tighten or replace as necessary.
  3. Reassemble the air filter housing and ensure it is sealed properly.
• Tools Required: Socket set, pliers.
• Safety Warnings: Allow the engine to cool before accessing components.

4. Inspect Exhaust System

• Sub-steps:
  1. Visually inspect the exhaust pipes, muffler, and connections for any signs of damage or rust.
  2. Use a pressure tester to check for leaks in the exhaust system.
  3. Repair or replace any damaged sections of the exhaust system as needed.
• Tools Required: Pressure tester, wrench set.
• Safety Warnings: Be cautious of hot exhaust components.