AP Exhaust 642038 Catalytic Converter - Rear

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AP Exhaust 642038 Catalytic Converter - Rear

Brand	AP Exhaust 642038
Position	Rear
Body Material	Stainless steel
Inlet Gasket	Yes
Inlet Hardware	None
Inlet Type A	2 bolt welded flange
O2 Sensor Ports	None
Outlet Gasket	Not required
Outlet Hardware	Yes
Outlet Type A	2.13" od pipe
Overall Length (IN)	16
Substrate Material	Ceramic
Type	Federal / epa direct-fit
Fits	Mazda · 16 vehicles

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

Stainless steel body. Resists corrosion for dependable exhaust service.

Ceramic substrate. Supports efficient converter performance with proprietary loading.

Cross-references L5202055XB for the same application. See all 1.

$184.04Free shipping

In stock · usually ships same day before 1pm CST

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Direct-Fit Catalytic Converter for Mazda 3

AP Exhaust 642038 is a Federal / EPA direct-fit catalytic converter built for rear-position applications on select Mazda 3 and Mazda 3 Sport models. It uses a stainless steel body with a ceramic substrate and OE-style dimensions for a precise replacement on the listed vehicles.

For 2010-2013 Mazda 3 rear applications, this converter is specified for use with aftermarket pipe 58553. The design supports proper exhaust flow and emissions control while matching the fitment requirements of the original system layout.

Key Features

Federal / EPA direct-fit catalytic converter
Stainless steel body for corrosion resistance
Ceramic substrate material
2-bolt welded flange inlet
2.13" OD pipe outlet
Inlet gasket included
Outlet hardware included
Overall length: 16 inches
No O2 sensor ports

Product Details

AP Exhaust 642038 is engineered with ARISTO substrate chemistry and manufactured to OE dimensions for consistent fitment on the specified Mazda rear exhaust applications. The converter is built for 2010-2013 Mazda 3 rear and 2012 Mazda 3 Sport rear configurations, with notes calling for aftermarket pipe 58553 where applicable. This part cross-references Monroe Shocks & Struts (e.g., L5202055XB) for the same application.

What It Helps Address

Failed catalytic converter efficiency codes
Restricted exhaust flow from a worn converter
Emissions test failure on the listed Mazda applications
Exhaust leaks at the converter connection points
Fitment issues when replacing a welded OE rear assembly

Installation Notes

Fits 2010-2013 Mazda 3, rear.
Fits 2012 Mazda 3 Sport, rear.
Use with aftermarket pipe 58553 where noted in the fitment data.
OE system was a welded assembly on some applications; related parts noted in the vehicle listing should be replaced as specified.
Federal and California emissions notes are listed for the applications shown; verify state restrictions before installation.

Quality Assurance

AP Exhaust uses automated workstations, spinner welding equipment, and high-speed production lines to build converters to exact OE dimensions and fitment. The manufacturer positions this process to support consistent manufacturing quality and competitive pricing across its emissions product line.

This part fits 16 vehicles

Always verify fitment with your vehicle's VIN if unsure. Submodel & trim restrictions may apply.

Year	Make	Model	Liters	Cylinders	Position	Notes
2013	Mazda	3	2.0L	L4	Rear	Direct Fit; (Use with Aftermarket Pipe 58553); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 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.
2013	Mazda	3	2.0L	L4	Rear	Direct Fit; For use with Aftermarket Pipe 58553; 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.
2012	Mazda	3	2.0L	L4	Rear	Direct Fit; (Use with Aftermarket Pipe 58553); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 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.
2012	Mazda	3	2.5L	L4	Rear	Direct Fit; (Use with Aftermarket Pipe 58553); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 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.
2012	Mazda	3	2.0L	L4	Rear	Direct Fit; For use with Aftermarket Pipe 58553; 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.
2012	Mazda	3	2.5L	L4	Rear	Direct Fit; Use with Aftermarket Pipe 58553; 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.
2012	Mazda	3 Sport	2.5L	L4	N/A	Direct Fit; OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 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.
2012	Mazda	3 Sport	2.5L	L4	Rear	Direct Fit; For use with Aftermarket Pipe 58553; 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.
2011	Mazda	3	2.0L	L4	Rear	Direct Fit; (Use with Aftermarket Pipe 58553); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 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.
2011	Mazda	3	2.5L	L4	Rear	Direct Fit; (Use with Aftermarket Pipe 58553); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 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.
2011	Mazda	3	2.0L	L4	Rear	Direct Fit; For use with Aftermarket Pipe 58553; 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.
2011	Mazda	3	2.5L	L4	Rear	Direct Fit; Use with Aftermarket Pipe 58553; 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.
2010	Mazda	3	2.0L	L4	Rear	Direct Fit; (Use with Aftermarket Pipe 58553); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 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.
2010	Mazda	3	2.5L	L4	Rear	Direct Fit; (Use with Aftermarket Pipe 58553); OE system was a welded assembly. It is recommended that all parts noted [1] should be replaced.; 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.
2010	Mazda	3	2.0L	L4	Rear	Direct Fit; For use with Aftermarket Pipe 58553; 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.
2010	Mazda	3	2.5L	L4	Rear	Direct Fit; Use with Aftermarket Pipe 58553; 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.
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Directly replaces or cross-references 1 part number

Cross-reference numbers are provided for identification purposes only. Always confirm fitment before ordering.

L5202055XB