my Toyota Highlander Fourth Generation (2020-present) has a strange smell when I accelerate

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface with the engine off and cool.
• Disconnect the battery to prevent any electrical issues.

2. Inspect and Replace Fluids

• Engine Oil:

  • Remove the oil drain plug using a socket set.
  • Drain the old oil into a container.
  • Replace with new engine oil as per manufacturer specifications (e.g., 0W-20).
  • Replace the oil filter if necessary.
  • Reinstall the drain plug and torque to manufacturer specifications.

• Transmission Fluid:

  • Locate the transmission dipstick and remove to check fluid level.
  • If low, add the appropriate transmission fluid until it reaches the recommended level.
  • If burnt smell is detected, consider a full transmission fluid change.

3. Check and Replace Air Filter

• Open the air filter housing using the appropriate socket or screwdriver.
• Remove the old air filter and inspect for dirt or damage.
• Install a new air filter that meets OEM specifications.
• Secure the housing cover back in place.

4. Inspect Exhaust System

• Visually examine the exhaust pipes and muffler for rust, holes, or leaks.
• If any damages are found, replace affected components.
• Ensure all exhaust clamps are secure and not allowing leaks.

5. Fuel System Inspection

• Check fuel lines and connections for leaks or cracks.
• If a gasoline smell is present, replace any damaged fuel lines.
• Inspect the fuel injectors for proper function; replace if faulty.