my Toyota Highlander Third Generation (2014-2019) makes a loud noise when accelerating, what's wrong

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a flat surface and the engine is off.
• Disconnect the battery for safety.

2. Inspect and Repair Exhaust System

• Tools Required: Socket set, jack stands, exhaust pipe wrench
• Check for visible damage or rust on the exhaust pipes and muffler.
• If a leak is found, replace the affected section of the exhaust pipe or muffler.
• Tighten any loose connections or replace gaskets as necessary.

3. Check Engine Mounts

• Tools Required: Socket set, pry bar
• Visually inspect engine mounts for cracks or severe wear.
• If damaged, remove the bolts securing the engine mount using a socket set.
• Replace the worn engine mount with a new one and secure it with the specified torque values (refer to the service manual for specific torque specs).

4. Address Air Intake System Issues

• Tools Required: Screwdriver set, vacuum gauge
• Remove the air intake duct and inspect for blockages or leaks.
• Clean any debris from the air filter. Replace if necessary.
• Ensure all connections are secure and reassemble.

5. Review Drivetrain Components

• Tools Required: Jack stands, torque wrench
• Inspect the transmission and differential for signs of leaks or unusual noise.
• If issues are found, consult the service manual for further disassembly and repair instructions.