why does my Toyota Highlander Third Generation (2014-2019) have a burning smell after driving

Toyota Highlander Third Generation (2014-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

550 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

Discover the causes and solutions for a burning smell after driving your 2014-2019 Toyota Highlander. Step-by-step diagnostic and repair guide included.

Affected Component

Engine

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Allow the engine to cool completely before working on any components.
•Disconnect the battery before performing electrical inspections or repairs.

Symptoms

•Burning smell noticeable after driving
•Overheating engine temperature gauge
•Smoke from under the hood
•Reduced engine performance
•Fluid leaks observed on the ground

Diagnostic Steps

1
Inspect engine oil level and condition using the dipstick.
2
Check transmission fluid level and quality.
3
Inspect for any visible leaks around engine and transmission components.
4
Examine the exhaust system for any signs of burning or damage.
5
Use an OBD-II scanner to check for any stored error codes.
6
Inspect the cooling system, including hoses and radiator, for blockages or leaks.

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

•Socket set
•Wrench set
•OBD-II scanner
•Coolant pressure tester
•Fluid catch pan

Parts Required

•Engine oil (0W-20)
•Oil filter
•Transmission fluid (as per specifications)
•Coolant (Toyota Super Long Life)

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Diagnostic Steps

1
Inspect engine oil level and condition using the dipstick.
2
Check transmission fluid level and quality.
3
Inspect for any visible leaks around engine and transmission components.
4
Examine the exhaust system for any signs of burning or damage.
5
Use an OBD-II scanner to check for any stored error codes.
6
Inspect the cooling system, including hoses and radiator, for blockages or leaks.

Solution

1. Preparation

Tools Required: Socket set, wrench set, OBD-II scanner, coolant pressure tester, fluid catch pan.
Ensure the vehicle is parked on a flat surface and the engine is cool before starting repairs.
Disconnect the battery to prevent any electrical shorts.

2. Check and Replace Engine Oil

Remove the engine oil dipstick and check the oil level and condition.
If oil is low or dirty, drain the old oil using a fluid catch pan.
Replace with new engine oil that meets Toyota specifications (e.g., 0W-20).
Replace the oil filter if necessary.
Refill the engine with fresh oil and check the level again.

3. Inspect and Replace Transmission Fluid

Locate the transmission dipstick and check the fluid level and condition.
If fluid is low or burnt, drain the transmission fluid using a fluid catch pan.
Replace with the appropriate transmission fluid as specified in the owner's manual.
Check for any signs of damage around transmission cooler lines and replace if damaged.

4. Coolant System Inspection

Inspect the radiator and hoses for leaks or damage.
If coolant is low, refill with the correct type of coolant (e.g., Toyota Super Long Life Coolant).
Perform a coolant pressure test to check for leaks in the system.

5. Exhaust System Inspection

Inspect the entire exhaust system for any signs of leaks, especially around the manifold and catalytic converter.
Repair or replace any damaged components found during inspection.