Front Catalytic Converter Set Replacement for 2007-2018 Nissan Altima 3.5L, 2009-2019 Murano 3.5L, 2011-2014 Quest & 2013-2019 Pathfinder 3.5L, 2013

The 40886 40885 Front Left & Right Pair Catalytic Converter Set has garnered a mixed reception among customers, particularly those fitting the product to Nissan vehicles such as the Altima, Murano, Quest, Pathfinder, and Infiniti JX35 and QX60. While there are a few reports of successful installations and satisfactory performance, a significant number of users have experienced compatibility issues and poor durability. Several customers have noted that the catalytic converters did not fit well with the exhaust manifold, often requiring modifications such as trimming or drilling to achieve a proper fit. This has led to frustration, especially for those who find the installation process labor-intensive and costly, due to the need to remove other components to access the manifold. In addition, a recurring theme among reviews is the reappearance of engine codes related to catalytic efficiency shortly after installation, which has caused some users to question the quality and effectiveness of the product. While there are positive remarks regarding ease of installation and initial performance, the long-term reliability seems to be a concern, with some converters failing within a month and customer service issues regarding warranties being cited. Overall, Prospective buyers should weigh the potential for additional work and compatibility adjustments against the benefits of a lower-cost replacement. **