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What performance issues are commonly reported by 2021 Toyota Highlander owners? - Toyota Highlander
Home/Cars/Toyota/Highlander/Fourth Generation (2020-present)/What performance issues are commonly reported by 2021 Toyota Highlander owners?

What performance issues are commonly reported by 2021 Toyota Highlander owners?

Toyota Highlander Fourth Generation (2020-present)

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

Problem Statement

Explore common performance issues reported by 2021 Toyota Highlander owners, including symptoms, diagnostic steps, and repair instructions.

Affected Component
Engine, Transmission, Brakes, Electrical System

Symptoms

  • •Engine hesitates during acceleration
  • •Rough idle when the vehicle is stopped
  • •Check engine light activation
  • •Harsh or delayed shifting between gears
  • •Engine revs higher than normal before shifting
  • •Transmission fluid leaks
  • •Squeaking or grinding noises when braking
  • •Soft or spongy brake pedal
  • •Vibration during braking
  • •Infotainment system freezes or resets
  • •Navigation system fails to load maps
  • •Bluetooth connectivity issues

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

  • •OBD-II scanner
  • •Fuel pressure gauge
  • •Socket set
  • •Torque wrench
  • •Throttle body cleaner
  • •Transmission fluid dipstick or funnel
  • •Jack and jack stands
  • •Lug wrench
  • •Brake fluid tester
  • •Fuse puller
  • •Owner's manual

Additional Information

Affected Component
Engine, Transmission, Brakes, Electrical System
Difficulty
medium
Severity
medium
Tools Required
11 items

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Back to Generation
Common Performance Issues Reported by 2021 Toyota Highlander Owners

Overview

The 2021 Toyota Highlander, part of the fourth generation (XU70), has been generally well-received. However, some owners have reported specific performance issues. Below are the common symptoms, diagnostic steps, and potential solutions for these issues.

1. Engine Hesitation or Rough Idle
Tools Required:
  • OBD-II scanner
  • Fuel pressure gauge
  • Socket set
  • Torque wrench
  • Throttle body cleaner

Repair Instructions:

  1. Replace Spark Plugs: If faulty, use a socket set to remove and replace spark plugs.
  2. Clean Throttle Body: Remove the throttle body and clean it using throttle body cleaner.
  3. Replace Fuel Filter: If fuel pressure is low, replace the fuel filter.
  4. Clear Codes: After repairs, clear the trouble codes and test drive to confirm resolution.
2. Transmission Shifting Issues
Tools Required:
  • OBD-II scanner
  • Transmission fluid dipstick or funnel
  • Torque wrench
  • Basic hand tools

Repair Instructions:

  1. Top Up Fluid: If low, add the appropriate transmission fluid as specified in the owner's manual.
  2. Change Transmission Fluid: If the fluid is dirty or burnt, perform a fluid change, including replacing the filter.
  3. Inspect and Repair Wiring: Repair any damaged wiring or connections.
  4. Reset Transmission Adaptations: If necessary, reset the transmission control module.
3. Brake Problems
Tools Required:
  • Jack and jack stands
  • Lug wrench
  • Brake fluid tester
  • Basic hand tools

Repair Instructions:

  1. Replace Brake Pads: If worn, remove the wheel, caliper, and replace pads.
  2. Resurface or Replace Rotors: If rotors are warped, either resurface them or replace if beyond limits.
  3. Bleed Brake Lines: If the pedal is spongy, bleed the brake lines to remove air.
  4. Top Up Brake Fluid: Ensure the brake fluid is at the correct level.
4. Electrical Issues (e.g., infotainment system glitches)
Tools Required:
  • OBD-II scanner (for updates)
  • Fuse puller
  • Owner's manual

Repair Instructions:

  1. Update Software: If an update is available, follow the manufacturer's instructions for installation.
  2. Replace Blown Fuses: If any fuses are blown, replace them with the correct amperage.
  3. Reset System: If issues persist, perform a hard reset of the infotainment system.
Conclusion

While the 2021 Toyota Highlander is generally reliable, these common performance issues can affect the driving experience. Following the outlined diagnostic steps and repair instructions can help owners troubleshoot and resolve these issues effectively. For persistent problems, it is advisable to consult a professional technician or authorized Toyota service center.