Catalytic Converter for Toyota 4Runner (2005-2009) 4.7L Front Left

Direct-Fit Front Left Catalytic Converter for 2005-2009 Toyota 4Runner

What it Does: The Front Left Catalytic Converter replaces the degraded or cracked factory manifold catalyst assembly on the 2005-2009 Toyota 4Runner to clear diagnostic trouble codes, restore exhaust gas velocity, and bring vehicle emissions back to EPA standards.

The Stock Toyota 4Runner Manifold Fatigue

The factory exhaust setup on the fourth-generation N210 4Runner running the 4.7L 2UZ-FE V8 is notorious for thermal fatigue. Over time, extreme heat cycling causes the factory welded collector seams to develop micro-fractures, producing an audible cold-start exhaust tick. Simultaneously, high-mileage ceramic washcoats degrade and lose catalytic reduction efficiency, triggering persistent P0420/P0430 trouble codes. Substrate sintering or internal crumbling further restricts exhaust gas flow, elevating cylinder head backpressure and dulling throttle response under load.

The Engineering Solution

This direct-fit front left assembly is manufactured from heavy-gauge stainless steel to resist rust, warping, and vibrational cracking across tough terrain. Internally, a dense ceramic honeycomb monolith wash-coated with targeted precious metals maximizes surface area contact, accelerating the conversion of hydrocarbons, carbon monoxide, and NOx into inert gases. Built with thick, precision-machined flanges and robotic TIG welds, it matches factory manifold drops to prevent exhaust leaks. The unit aligns with existing OEM downstream head-pipe routing and integrates factory-position O2 sensor bungs, eliminating the need for cutting, bending, or custom exhaust fabrication.

Technical Specifications

Compatibility

• 2005 Toyota 4Runner 4.7L V8 (Limited, SR5, Sport)
• 2006 Toyota 4Runner 4.7L V8 (Limited, SR5, Sport)
• 2007 Toyota 4Runner 4.7L V8 (Limited, SR5, Sport)
• 2008 Toyota 4Runner 4.7L V8 (Limited, SR5, Sport)
• 2009 Toyota 4Runner 4.7L V8 (Limited, SR5, Sport)

Frequently Asked Questions

Does this fit the N210 4Runner?
Yes, this is a direct fit for the 2005-2009 Toyota 4Runner equipped with the 4.7L 2UZ-FE engine.

Will this clear a catalyst efficiency P0430 diagnostic trouble code?
Yes, assuming functioning upstream/downstream oxygen sensors, replacing a degraded Bank 2 converter with this federal-compliant assembly restores catalyst efficiency above the DTC threshold.

The Toyota Durability Standard

The 4Runner platform is engineered for long-term utility, high payload ratings, and rugged off-road operation. This converter assembly is built to manage the sustained thermal output generated when hauling heavy trailers or navigating low-range climbs without substrate blowout or joint fatigue.