Catalytic Converter for Mazda CX-9 (2007-2015) 3.5L 3.7L

Direct-Fit Rear Right Catalytic Converter for 2007-2015 Mazda CX-9

What it Does: Replaces the deteriorated factory rear/right emissions unit to eliminate P0420/P0430 diagnostic trouble codes, restore rated exhaust velocity, and satisfy OBD-II compliance without custom fabrication.

The Stock CX-9 Catalyst Degradation

The factory catalytic converters on the TB-chassis CX-9 endure chronic thermal cycling and dense washcoat erosion over extended mileage. In the transverse MZI/Cyclone V6 layout, elevated exhaust gas temperatures degrade the internal ceramic monolith, causing cell wall collapse, accelerated flow restriction, and reduced catalyst washcoat efficiency. This structural breakdown restricts scavenging, generates excessive backpressure that saps mid-range torque, and trips persistent catalyst efficiency check engine lights.

The Engineering Solution

Engineered as a bolt-on solution, this assembly features a durable stainless steel outer shell designed to withstand road debris impacts and thermal expansion. Internally, a high-efficiency ceramic honeycomb substrate provides optimal precious metal surface area to oxidize carbon monoxide and unburnt hydrocarbons while reducing nitrogen oxides. Precision-welded, OEM-spec flanges align flush with factory mating surfaces, utilizing the supplied hardware and gaskets to ensure a gas-tight seal that prevents post-manifold exhaust leaks and O2 sensor signaling errors.

Technical Specifications

Compatibility

• 2007 Mazda CX-9: 3.5L V6 (Sport, Touring, Grand Touring)
• 2008 Mazda CX-9: 3.7L V6 (Sport, Touring, Grand Touring)
• 2009 Mazda CX-9: 3.7L V6 (Sport, Touring, Grand Touring)
• 2010 Mazda CX-9: 3.7L V6 (Sport, Touring, Grand Touring)
• 2011 Mazda CX-9: 3.7L V6 (Sport, Touring, Grand Touring)
• 2012 Mazda CX-9: 3.7L V6 (Sport, Touring, Grand Touring)
• 2013 Mazda CX-9: 3.7L V6 (Sport, Touring, Grand Touring)
• 2014 Mazda CX-9: 3.7L V6 (Sport, Touring, Grand Touring)
• 2015 Mazda CX-9: 3.7L V6 (Sport, Touring, Grand Touring)

The Mazda Reliability Caliber

Preserve your crossover's powertrain reliability with an emissions unit built to match factory backpressure thresholds, ensuring smooth power delivery and consistent sensor feedback without triggering check engine lights.