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What should I check if there is a burning smell coming from my 2020 Highlander? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/What should I check if there is a burning smell coming from my 2020 Highlander?

What should I check if there is a burning smell coming from my 2020 Highlander?

Toyota Highlander Fourth Generation (2020-present)

Error Codes
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
4 min read
604 words

Problem Statement

Learn how to diagnose and resolve a burning smell in your 2020 Toyota Highlander with these detailed steps and tips.

Affected Component
engine, brakes, electrical system

Symptoms

  • •Unpleasant burning smell (could be rubber, oil, or electrical)
  • •Possible smoke coming from under the hood or around the tires
  • •Warning lights on the dashboard (e.g., check engine light)
  • •Unusual noises accompanying the smell (grinding, squeaking, etc.)

Diagnostic Steps

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Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

  • ✓Test the affected component to ensure it functions correctly
  • ✓Check for any error codes or warning lights
  • ✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

  • •Follow the manufacturer's recommended maintenance schedule
  • •Address warning signs early before they develop into major issues
  • •Use quality parts and fluids recommended for your vehicle
  • •Keep detailed records of all repairs and maintenance

Tools & Equipment Required

  • •Flashlight
  • •Mechanic gloves
  • •Torque wrench
  • •Multimeter
  • •Basic hand tools (screwdrivers, pliers, wrenches)
  • •Brake cleaner
  • •Oil catch pan

Additional Information

Affected Component
engine, brakes, electrical system
Difficulty
medium
Severity
medium
Tools Required
7 items

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Back to Generation

If you're experiencing a burning smell coming from your 2020 Toyota Highlander, it’s essential to diagnose the issue promptly to prevent further damage. Below are detailed steps to identify and potentially resolve the problem.

Step 1: Safety First

  1. Pull Over Safely: If you’re driving, find a safe location to stop your vehicle and turn off the engine.
  2. Open the Hood: Allow the engine to cool down before proceeding. Use gloves if necessary.

Step 2: Visual Inspection

  1. Check for Smoke: Look for any visible smoke or signs of overheating from the engine compartment.
  2. Inspect Belts and Hoses: Look for signs of wear, cracks, or fraying on engine belts and hoses. Any rubber components that look melted or deformed may be the source of the smell.
  3. Fluid Leaks: Look for leaks of oil, coolant, or transmission fluid under the vehicle. Oil leaks can drip onto hot engine components, creating a burning smell.
  4. Brake Components: Inspect brake pads and rotors for excessive wear or overheating. If brakes are overheated, they might emit a burning smell.
  5. Wiring Inspection: Check for any exposed or damaged wiring that may be shorting out, which can cause an electrical burning smell.

Step 3: Check Fluid Levels

  1. Engine Oil: Ensure the oil level is adequate. Low oil can overheat the engine.
  2. Coolant Levels: Make sure there’s sufficient coolant in the reservoir; low coolant can lead to overheating.
Tools Required
  • Flashlight
  • Mechanic gloves
  • Torque wrench (for tightened components)
  • Multimeter (for electrical issues)
  • Basic hand tools (screwdrivers, pliers, wrenches)
  • Brake cleaner (if inspecting brakes)
  • Oil catch pan (if checking for leaks)
Repair Instructions

Step 1: Addressing Engine Components

  1. Replace Damaged Belts/Hoses:

    • If you find any damaged belts or hoses, replace them immediately. Refer to the repair manual for specific instructions on removal and installation.

  2. Fix Fluid Leaks:

    • If you identify leaking oil or coolant, locate the source of the leak. Replace gaskets, seals, or damaged hoses as necessary. Ensure all connections are secured properly.

Step 2: Brake Inspection

  1. Brake Pad Replacement:

    • If brake pads show signs of excessive wear, replace them. Remove the wheel, unbolt the caliper, and replace the pads. Be sure to follow the torque specifications for the caliper bolts during reinstallation.

  2. Brake Fluid Check:

    • Ensure the brake fluid is at the recommended level. If it’s low, top it off with the appropriate fluid (DOT 3 or DOT 4).

Step 3: Electrical Issues

  1. Wiring Repair:

    • If damaged wiring is found, repair or replace the affected wires. Use electrical tape or heat-shrink tubing to insulate any splices.

  2. Check Battery Connections:

    • Ensure that battery terminals are clean and tight. Corrosion can lead to electrical issues.
Final Steps
  1. Test Drive: After repairs, take the Highlander for a test drive to ensure the smell has dissipated and no warning lights are illuminated.
  2. Monitor Performance: Keep an eye on temperature gauges and listen for any unusual noises.
When to Seek Professional Help

If the burning smell persists after performing these checks, or if you're unable to identify the source, it’s advisable to seek assistance from a qualified technician. Electrical issues, in particular, can be complex and require specialized equipment for accurate diagnosis.