why does my Volkswagen Golf MK7 (2015-2019) have an exhaust smell

Solution

1. Preparation

• Gather necessary tools and parts.
• Tools Required: Jack and jack stands, socket set, OBD-II scanner, flashlight, safety goggles, gloves.
• Safety Warnings: Ensure the vehicle is on a flat surface and the engine is cool before starting work.

2. Inspect Exhaust System

• Raise the vehicle using a jack and secure it with jack stands.
• Visually inspect the entire exhaust system from the exhaust manifold to the tailpipe for any cracks or holes.
• Use the OBD-II scanner to check for error codes related to emissions or exhaust issues.

3. Repair or Replace Components

• If leaks are found, mark the areas for repair. Depending on the severity, you may need to use exhaust sealant or replace sections of the exhaust pipe.
• If the catalytic converter is blocked or damaged, replace it with a new unit that meets OEM specifications.
• For faulty gaskets or seals, remove the affected parts and replace them with new gaskets, ensuring proper torque specifications are followed.

4. Replace Oxygen Sensors (if necessary)

• If diagnostics indicated faulty oxygen sensors, disconnect the battery to prevent electrical shorts.
• Remove the old sensors using a socket wrench. Install new sensors, ensuring they are properly threaded and secured.
• Reconnect the battery and clear any diagnostic codes using the OBD-II scanner.