Catalytic Converter for Toyota Highlander (2008-2013) 3.5L

Direct-Fit Stainless Catalytic Converter for 2008-2013 Toyota Highlander (XU40)

What it Does: This direct-fit underbody catalytic converter replaces the failed rear catalyst on the 2008-2013 Toyota Highlander (XU40) 2GR-FE 3.5L V6 to restore exhaust flow, stop substrate rattle, and resolve emissions faults.

The Stock Toyota Highlander Underbody Catalyst Failure

High mileage and thermal cycling degrade the factory precious-metal washcoat inside the XU40 Highlander rear underbody converter on 2GR-FE 3.5L V6 models. Repeated heat soak fractures the internal ceramic monolith, causing loose chunks to rattle and restrict exhaust flow. Road salt also corrodes the mild-steel spring-bolt flanges. When oxygen storage capacity drops, downstream sensors detect poor conversion efficiency and trigger P0420 or P0430 fault codes.

Common Symptoms of a Failing OEM Catalytic Converter

• Check Engine Light (DTCs): Triggered P0420 or P0430 catalyst efficiency below threshold fault codes.
• Underbody Metallic Rattle: Audible rattling beneath the cabin from a broken internal ceramic honeycomb brick.
• Exhaust Restriction & Emissions Failure: Collapsed substrate cells elevate backpressure, reduce upper-RPM power, and fail emissions testing.

The Direct-Fit Stainless Exhaust Solution

Built with a corrosion-resistant stainless steel shell and piping (8-inch body length, 5-inch height), this converter resists heat cracking and rust. Inside, a high-flow ceramic honeycomb substrate with a precious-metal washcoat restores HC, CO, and NOx conversion. Factory-spec flanges, welded hanger rods, and a slip-fit outlet sit downstream of the O2 sensors (no sensor ports on this section) for a bolt-on install using the included hardware without cutting or welding.

What's Included

• 1 x Catalytic Converter
• 1 x Ring Seal
• 1 x U-Clamp
• 2 x Spring Bolts with springs and nuts

Technical Specifications

Compatibility

• 2008, 2009, 2010, 2011, 2012, 2013 Toyota Highlander (Base, Sport, SE, Limited, Plus) - 3.5L V6
• 2011, 2012, 2013 Toyota Highlander Hybrid - 3.5L V6
• Exclusions: Does not fit 2.7L 4-cylinder models or 2008-2010 Highlander Hybrid 3.3L models.
• Emissions Note: EPA federal compliant only; not CARB approved and not legal for vehicles registered in CA, NY, CO, or ME.

Frequently Asked Questions & Fitment Warnings

Does this fit the XU40 Highlander?

Yes. This is a direct fit for the 2008-2013 Toyota Highlander equipped with the 2GR-FE 3.5L V6 engine and 2011-2013 3.5L Hybrid. Excluded are 2.7L 4-cylinder models, 2008-2010 3.3L Hybrids, and vehicles registered in California, New York, Colorado, or Maine.

Will this clear P0420/P0430 codes, and are O2 sensors included?

Yes, if the catalyst has failed, but O2 sensors are excluded. A fresh substrate restores efficiency to clear P0420/P0430 codes; inspect for leaks and reuse or replace existing O2 sensors (no sensor ports on this section).

Are gaskets and mounting hardware included for installation?

Yes. A ring seal, U-clamp, and two spring bolts with springs and nuts are included; let the exhaust cool, soak seized fasteners in penetrating oil, and torque joints evenly.

The Toyota Precision Standard

Engineered to match factory underbody tolerances on the XU40 chassis, this catalytic converter ensures accurate emissions compliance and CEL-free ECM operation. Expect quiet, leak-free exhaust flow and long-term thermal durability.