Walker 16693 Catalytic Converter

Walker EPA Direct-Fit Catalytic Converter

Walker EPA Part Number 16693 is a direct-fit catalytic converter built for specific applications and engineered to meet EPA standards. It is designed for rear converter placement and uses a stainless steel body with a ceramic substrate for dependable exhaust aftertreatment performance on select OBDII vehicles.

Compatible with 2011-2016 Toyota Sienna, this Walker Ultra Direct-Fit catalytic converter supports a clean, OE-style exhaust repair for the listed Federal and California emission configurations. The Walker EPA line focuses on direct-fit replacement coverage for import and domestic 1996-and-newer vehicles, with application-specific fitment for easier matching to the original exhaust layout.

Key Features

• Walker EPA Part Number 16693
• Direct-fit, specific-fit design for the listed application
• Rear converter position
• Stainless steel body construction
• Ceramic substrate material
• 2-bolt welded flange inlet and outlet connections
• No oxygen sensor port location
• Fits 2011-2016 Toyota Sienna, rear

Detailed Description

This catalytic converter is built for the rear exhaust position and matches the factory-style connection layout with 2-bolt welded flanges at both ends. The round stainless steel body measures approximately 4 inches in height and width with an 8-inch body length and an overall length of about 19.27 inches. Walker EPA 16693 is listed for 2011-2016 Toyota Sienna models and is referenced for Federal and California emission-equipped vehicles in the fitment data provided.

This part cross-references AP Exhaust 644061 and Gates 52557 for the same application. The Walker EPA product line is positioned as a direct-fit exhaust replacement option for OBDII vehicles, giving buyers a vehicle-specific solution rather than a universal converter.

Common Repair Uses

• Replacing a failed rear catalytic converter on a 2011-2016 Toyota Sienna
• Restoring exhaust flow after catalyst efficiency deterioration
• Addressing emissions-related diagnostic trouble codes tied to converter performance
• Repairing exhaust leaks at the converter flange connection points
• Replacing a rusted or damaged OE-style rear converter assembly

Installation Notes

Fits 2011-2016 Toyota Sienna, rear. The fitment notes specify that an exhaust gasket is recommended and that additional part(s) are needed to complete installation: 2 of 31639. This converter uses a direct-fit layout with no air tube and no oxygen sensor port location, so confirm the original exhaust configuration before installation.

Fitment notes also state that this part is not legal for sale or use in California and other CARB-compliant states, and that New York and Maine use restrictions apply to EPA Federal Emission Equipped Vehicles only. Review local aftermarket converter regulations before purchase or installation.

Quality Assurance

Walker EPA 16693 is built to comply with EPA standards and is intended for the listed vehicle applications. The package contents include an installer card and warranty card.