Catalytic Converter for Toyota Sienna (2011-2015) 3.5L Left & Right

Direct-Fit Manifold Catalytic Converter Set for 2011-2015 Toyota Sienna (XL30)

What it Does: The manifold catalytic converter set replaces degraded factory catalytic units on the 2011-2015 Toyota Sienna to eliminate P0420/P0430 efficiency codes, normalize exhaust backpressure, and restore clean tailpipe emissions.

The Stock Toyota Sienna Catalytic Substrate Degradation

Over extended mileage and repeated thermal cycles, the factory manifold converters on the XL30 platform suffer from washcoat depletion and thermal fracturing. As the ceramic internal substrate loses its precious-metal oxygen storage capacity, the downstream oxygen sensors detect incomplete hydrocarbon and NOx reduction, immediately triggering P0420 and P0430 diagnostic trouble codes. In severe cases, internal ceramic breakdown causes physical rattling, exhaust restriction, elevated exhaust gas temperatures, and noticeable loss of engine responsiveness under load.

The Engineering Solution

Engineered specifically for the transverse-mounted 2GR-FE 3.5L V6, this direct-fit replacement pair features heavy-gauge stainless steel outer shells designed to resist thermal stress and exterior corrosion. High-flow ceramic honeycomb substrates maximize surface contact area for rapid light-off and stable catalyst conversion without choking exhaust velocity. Precision-machined, OEM-style mounting flanges and integrated pre-catalytic oxygen sensor bungs bolt directly to factory cylinder head ports and downpipe connections, ensuring complete seal integrity with zero cutting or custom fabrication required.

What's Included

• 1 x Left-side manifold catalytic converter
• 1 x Right-side manifold catalytic converter

Technical Specifications

Compatibility

• 2011-2015 Toyota Sienna (Base, LE, SE, XLE, Limited) 3.5L V6 FWD / AWD

Frequently Asked Questions & Fitment Warnings

Does this fit the XL30 Sienna?

Yes, this is a direct fit for the 2011-2015 Toyota Sienna equipped with the 2GR-FE 3.5L engine. Note: EPA 48-state compliant; cannot be shipped to or registered in California, Colorado, New York, or Maine.

Do I need to weld or cut the exhaust piping during installation?

No, this unit features factory-matched flanges and pre-positioned O2 sensor ports designed for direct bolt-on mechanical replacement.

The Toyota Reliability Standard

Maintain factory powertrain calibration, clear persistent catalyst check engine codes, and keep your Sienna fully road-ready with high-integrity exhaust components matched to factory structural tolerances.