Catalytic Converter for Nissan Pathfinder (2005-2012) 4.0L

Direct-Fit Driver-Side Catalytic Converter for 2005-2012 Nissan Pathfinder

Primary Function: Restores exhaust scavenging efficiency and closed-loop OBD-II emissions compliance on the driver-side bank while clearing persistent P0420/P0430 diagnostic trouble codes.

The Stock Pathfinder Catalyst Degradation

The factory catalytic converters on the R51 platform suffer from severe thermal cycling and mechanical vibration during towing and off-road driving. Over time, the internal OEM ceramic honeycomb matrix fractures or suffers washcoat depletion, leading to restricted exhaust backpressure, lost low-end torque, and catalyst efficiency failure codes. Furthermore, factory mild-steel flange points frequently suffer from surface corrosion and warping, yielding post-manifold exhaust leaks.

The Engineering Solution

Constructed with a heavy-gauge stainless steel outer shell and a high-flow ceramic substrate, this direct-fit unit withstands severe thermal shock while maintaining proper precious metal catalytic reduction. Features include mandrel-bent stainless tubing for smooth exhaust velocity, precision CNC-machined mounting flanges, automated TIG welding, and a perforated heat shield to protect adjacent chassis components. Comes complete with a pre-welded oxygen sensor bung, replacement gaskets, and installation hardware for a true bolt-on repair.

Technical Specifications

Compatibility

• Vehicle: 2005-2012 Nissan Pathfinder (4.0L V6)
• Position: Driver Side (Bank 2)
• Emissions Standard: EPA OBD-II Approved (Federal 49-State). Not legal for sale or use in CA, NY, or ME.
• Interchange Numbers: 16467, 201082, 58239, 18219, 642138

The Nissan Durability Standard

Built specifically to handle the structural and thermal demands of the VQ40DE powertrain, this converter delivers dependable flow and emissions integrity for heavy payload hauling, prolonged highway towing, and off-pavement operation.