how to fix the catalytic converter issue in Toyota Highlander XU70 (2020-Present)

Solution

1. Preparation

• Gather tools and parts needed for the repair.
• Disconnect the battery to prevent electrical issues.
• Allow the engine to cool down before working on the exhaust system.

2. Remove the Catalytic Converter

• Tools Required: Socket set, torque wrench, penetrating oil, safety glasses, gloves.
• Start by applying penetrating oil on the bolts connecting the catalytic converter to the exhaust system and the manifold.
• Using a socket set, carefully remove the bolts securing the catalytic converter to the exhaust manifold and the mid-pipe. Retain the bolts for reinstallation.
• Disconnect any oxygen sensors connected to the catalytic converter by gently twisting and pulling them out.

3. Inspect and Clean (If Applicable)

• If the catalytic converter is not damaged but blocked, consider cleaning it using a specialized catalytic converter cleaner according to the product instructions.
• If physical inspection shows damage (cracks, internal melting), proceed to replace the catalytic converter.

4. Install New Catalytic Converter (If Necessary)

• Parts Required: New catalytic converter.
• Position the new catalytic converter in place of the old one.
• Reconnect the oxygen sensors, ensuring they are seated properly.
• Align the catalytic converter with the exhaust manifold and the mid-pipe, then hand-tighten the bolts before using a torque wrench to tighten them to manufacturer specifications.

5. Reconnect the Battery

• Once the installation is complete, reconnect the battery terminals.