Mitsubishi Outlander noisy front exhaust due to rusted and cracked flex section on Y pipe causing poor idle and O2 sensor issues on Mitsubishi Outlander

Submitted by caraholic · Jul 21, 2025
Published by RepairPal

Problem overview

Some Mitsubishi Outlander owners report experiencing issues with a noisy front exhaust due to a rusted and cracked flex section on the Y pipe, which can lead to exhaust leaks and a loud rumbling sound. These exhaust leaks may also cause unpleasant smells and contribute to poor idle and O2 sensor problems, negatively impacting engine performance and fuel economy. Additionally, owners note that addressing these rusted and cracked components is crucial for resolving the associated noise and performance issues. Regular maintenance and inspection of the exhaust system are recommended to prevent such problems, ensuring the vehicle's safety and optimal performance.

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