my Toyota Highlander Third Generation (2014-2019) has a burning smell what’s causing it

Toyota Highlander Third Generation (2014-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

522 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix burning smell issues in Toyota Highlander 2014-2019. Step-by-step guide with symptoms, diagnostic steps, and repair solutions.

Affected Component

Engine

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect battery before working on electrical systems.
•Allow the engine to cool before inspecting the engine compartment.

Symptoms

•Burning smell noticeable inside or outside the vehicle
•Smoke observed from the engine compartment or wheel area
•Overheating engine temperature gauge reading
•Unusual noises from the engine or braking system
•Warning lights illuminated on the dashboard (e.g., check engine light)

Diagnostic Steps

1
Inspect the engine compartment for any visible signs of oil or fluid leaks.
2
Check for frayed or damaged wiring that could cause electrical shorts or burning.
3
Test drive the vehicle and observe any changes in performance or unusual sounds.
4
Examine the brake components for overheating or burnt brake pads.
5
Scan the vehicle's computer for any error codes using an OBD-II scanner.

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
•Socket set
•Torque wrench
•Brake tool kit
•Multimeter

Parts Required

•Gaskets or seals (if leaks are present)
•Brake pads (if worn)
•Brake fluid (if needed)
•Electrical connectors or wiring (if damaged)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Inspect the engine compartment for any visible signs of oil or fluid leaks.
2
Check for frayed or damaged wiring that could cause electrical shorts or burning.
3
Test drive the vehicle and observe any changes in performance or unusual sounds.
4
Examine the brake components for overheating or burnt brake pads.
5
Scan the vehicle's computer for any error codes using an OBD-II scanner.

Solution

1. Preparation

Gather necessary tools and parts for the repair.
Ensure the vehicle is parked on a level surface with the engine off.
Disconnect the battery to avoid electrical shorts if working on electrical components.

2. Inspect and Resolve Engine Issues

Sub-step 1: Check for oil leaks. If found, clean the area and identify the source (e.g., gaskets, seals).
Sub-step 2: If oil is leaking onto hot engine parts, replace the faulty gasket or seal.
Sub-step 3: Replace any damaged wiring or connectors that may have caused an electrical burning smell.

3. Brake System Inspection

Sub-step 1: Remove the wheel to access the brake components.
Sub-step 2: Inspect brake pads and rotors for signs of wear or overheating.
Sub-step 3: If pads are worn down, replace them with high-quality aftermarket or OEM parts.
Sub-step 4: Ensure the brake fluid level is adequate and check for contamination.

4. Cooling System Check

Sub-step 1: Inspect coolant levels in the reservoir and radiator.
Sub-step 2: Look for leaks around hoses, the radiator, and the water pump.
Sub-step 3: If coolant is low, refill with the appropriate type (typically Toyota Pink coolant).