AP Exhaust 642804 Catalytic Converter - Rear
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AP Exhaust

AP Exhaust 642804 Catalytic Converter - Rear

Brand AP Exhaust 642804
Position Rear
Body Material Stainless steel
Inlet Gasket Yes
Inlet Hardware Yes
Inlet Type A 2 bolt welded flange w/ female flare
Inlet Type A 2 bolt welded flange w/ spherical flare
O2 Sensor Ports None
Outlet Gasket Yes
Outlet Hardware Yes
Outlet Type A 2 bolt welded flange w/ gasket stub
Overall Length (IN) 19.375
Substrate Material Ceramic
Type Federal / epa direct-fit
Fits Toyota · 12 vehicles

Federal / EPA direct-fit. Built to exact OE dimensions for straightforward installation.

Stainless steel body. Helps resist corrosion in demanding exhaust conditions.

Ceramic substrate. Proprietary chemistry promotes efficient converter performance.

Cross-references 17420-0P300 for the same application. See all 1.

$275.43Free shipping
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AP Exhaust 642804 Catalytic Converter

AP Exhaust 642804 is a Federal / EPA direct-fit catalytic converter built for precise OE-style fitment on select Toyota Sienna rear applications. It uses a ceramic substrate and stainless steel body construction to support efficient exhaust flow and emissions control while matching factory dimensions.

  • Federal / EPA direct-fit catalytic converter
  • Stainless steel body for corrosion resistance
  • Ceramic substrate material
  • Inlet gasket and outlet gasket included
  • Inlet hardware and outlet hardware included
  • 2-bolt welded flange inlet with female flare and spherical flare configurations
  • 2-bolt welded flange outlet with gasket stub
  • No O2 sensor ports
  • Overall length: 19.375 in.

Fitment Details

  • Fits 2012-2016 Toyota Sienna, rear; direct fit; Federal and California emissions. Not for sale or use on vehicles licensed in CA, CO, ME, or NY. Restrictions may apply in other states.
  • Fits 2011 Toyota Sienna, rear; direct fit; from 09/11; Federal and California emissions. Not for sale or use on vehicles licensed in CA, CO, ME, or NY. Restrictions may apply in other states.

Product Overview

This AP Exhaust catalytic converter is engineered around exact OE dimensions for straightforward replacement on the rear exhaust position of the Toyota Sienna. The ARISTO substrate chemistry is used to support efficient loading at a lower material cost, while AP Emissions Technologies’ automated manufacturing and spinner welding processes help maintain consistent fitment and build quality. Part number 642804 is also referenced for the same application as 17420-0P300.

Common Repair Uses

  • Check engine light related to catalyst efficiency
  • Failed emissions inspection caused by a worn rear converter
  • Exhaust restriction or reduced exhaust flow
  • Rust, cracking, or leakage at the converter body or flanges
  • Direct replacement for a damaged Toyota Sienna rear catalytic converter

Installation Notes

Verify the rear position, emissions family, and build date before ordering. This converter uses 2-bolt welded flange connections and includes inlet and outlet gaskets plus hardware, but the vehicle must be checked for the correct emissions certification and state restrictions before installation. Confirm the exhaust flange style and overall length against the original unit to ensure proper alignment on Toyota Sienna applications.

Quality Assurance

AP Exhaust builds this converter to OE dimensions using automated production equipment and controlled welding processes to support consistent fitment and repeatable assembly quality. The stainless steel body and ceramic substrate are selected for emissions service in direct-fit replacement applications.

Related reading

This part fits 12 vehicles
Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.
YearMakeModelDrive TypeLitersCylindersPositionNotes
2016ToyotaSiennaFWD3.5LV6RearDirect Fit; (From 09/2011); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2016ToyotaSiennaFWD3.5LV6RearDirect Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2015ToyotaSiennaFWD3.5LV6RearDirect Fit; (From 09/2011); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2015ToyotaSiennaFWD3.5LV6RearDirect Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2014ToyotaSiennaFWD3.5LV6RearDirect Fit; (From 09/2011); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2014ToyotaSiennaFWD3.5LV6RearDirect Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2013ToyotaSiennaFWD3.5LV6RearDirect Fit; (From 09/2011); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2013ToyotaSiennaFWD3.5LV6RearDirect Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2012ToyotaSiennaFWD3.5LV6RearDirect Fit; (From 09/2011); Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2012ToyotaSiennaFWD3.5LV6RearDirect Fit; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2011ToyotaSiennaFWD3.5LV6RearDirect Fit; (From 09/2011); From 09/11; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
2011ToyotaSiennaFWD3.5LV6RearDirect Fit; From 09/11; Federal and California Emissions. Not For Sale or Use on vehicles licensed in the state of CA, CO, ME & NY. Restrictions may apply in other states. Check with your state authority for details.
Directly replaces or cross-references 1 part number
Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.
17420-0P300