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Why does my 2020 Toyota Highlander produce a burning smell when driving? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/Why does my 2020 Toyota Highlander produce a burning smell when driving?

Why does my 2020 Toyota Highlander produce a burning smell when driving?

Toyota Highlander Fourth Generation (2020-present)

Error Codes
2-4 hours
Time
medium
Difficulty
medium
Severity
Navigation
ProblemSymptomsDiagnosisSolution
ProblemSymptomsDiagnosisSolution
4 min read
694 words

Problem Statement

Learn how to diagnose and repair a burning smell in your 2020 Toyota Highlander. Follow our step-by-step guide for effective troubleshooting and solutions.

Affected Component
engine, brakes, transmission
Estimated Time
2-4 hours

Symptoms

  • •A noticeable burning smell, resembling burnt oil, plastic, or rubber
  • •Stronger smell during acceleration or driving uphill
  • •Engine overheating
  • •Smoke from under the hood
  • •Unusual sounds from the engine compartment

Diagnostic Steps

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5

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
  • •Gloves
  • •OBD-II scanner (optional)
  • •Dipstick (for oil)
  • •Coolant reservoir sight glass
  • •Jack
  • •Jack stands
  • •Lug wrench
  • •Transmission fluid dipstick (if applicable)
  • •Wrench set
  • •Oil catch pan
  • •New gaskets or seals as necessary
  • •Brake pad replacement kit
  • •Brake cleaner
  • •Socket set
  • •Funnel

Additional Information

Affected Component
engine, brakes, transmission
Estimated Time
2-4 hours
Difficulty
medium
Severity
medium
Tools Required
16 items

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Back to Generation
Problem: Burning Smell When Driving

Repair Instructions

Step 1: Addressing Oil Leaks

  • If oil leaks are found:
    • Tools Required: Wrench set, oil catch pan, new gaskets or seals as necessary
    • Instructions:
      • Identify the source of the leak (e.g., oil filter, valve cover gasket).
      • Replace the faulty part and clean any spilled oil to prevent further burning smells.

Step 2: Replace Worn Brake Components

  • If brake pads are worn:
    • Tools Required: Brake pad replacement kit, brake cleaner, socket set
    • Instructions:
      • Remove the old brake pads and rotors if necessary.
      • Clean the caliper and install new pads or rotors as needed.
      • Reassemble and ensure brakes are functioning correctly before test driving.

Step 3: Change Transmission Fluid

  • If transmission fluid is burnt:
    • Tools Required: Transmission fluid, funnel, oil catch pan
    • Instructions:
      • Drain the old transmission fluid by locating the drain plug or removing the pan.
      • Replace the filter if applicable.
      • Refill with the manufacturer-recommended transmission fluid.

Step 4: Inspect Belts and Hoses

  • If any belts or hoses are damaged:
    • Tools Required: Belt tensioner tool, replacement belts or hoses
    • Instructions:
      • Remove the old belt or hose and compare it with the new part.
      • Install the new component ensuring proper tension and alignment.
Final Steps

  1. Reassemble

    • Ensure all covers, wheels, and components are reattached securely.

  2. Road Test

    • Take the vehicle for a short drive to confirm that the burning smell has ceased and that all systems are functioning normally.

  3. Monitor

    • Keep an eye on the vehicle for any reoccurrences of the burning smell, and if it persists, consider consulting a professional mechanic for further diagnosis.
Conclusion

A burning smell in your 2020 Toyota Highlander can stem from various issues, including oil leaks, brake wear, or problems with the transmission. Following the diagnostic steps outlined above will help identify the root cause, and applying the recommended repairs will ensure your vehicle remains safe and operational.