Walker 14753 Catalytic Converter - Rear

Overview

Walker EPA 14753 is a direct-fit catalytic converter built for specific applications and engineered to meet EPA standards. It uses a stainless steel body with a ceramic substrate and includes pre- and post-converter oxygen sensor ports for proper emissions system integration.

Fits 2019-2023 Nissan Altima, rear. This Walker catalytic converter is part number 14753 and is built for OBDII vehicles from 1996 and newer where EPA-compliant replacement is required.

Key Features

• Direct-fit design for specific applications
• EPA-compliant construction for emissions service
• Stainless steel body with ceramic substrate
• Two oxygen sensor ports for pre- and post-converter placement
• Round body shape with welded 2-bolt flange connections
• Inlet gasket and inlet mounting hardware included
• Hangers included for installation support

Product Details

Walker EPA 14753 is a premium catalytic converter designed for emissions replacement on select import and domestic OBDII vehicles. The round stainless steel housing measures 31 inches overall, with a 4-inch by 4-inch by 8-inch body and welded 2-bolt flange inlet and outlet connections. The ceramic substrate is paired with two sensor ports to support the vehicle’s emissions monitoring setup. For buyers searching for a Nissan Altima rear catalytic converter or Walker 14753 catalytic converter, this unit provides the fitment and construction details needed for a direct replacement.

The EPA product line from Walker focuses on compliant replacement exhaust components for OBDII applications. This part cross-references AP Exhaust 644220 for the same application.

Common Replacement Issues

• Failed emissions testing due to a worn converter
• Check engine light related to catalyst efficiency codes
• Restricted exhaust flow from internal substrate damage
• Corrosion or leakage at the converter body or flange connections
• Sensor-related exhaust faults at pre- or post-converter locations

Installation Notes

Verify fitment by year, make, model, and rear position before installation. The inlet side includes gasket and mounting hardware; the outlet side does not include mounting hardware. Confirm sensor port alignment and flange style against the original exhaust configuration before final assembly.

Quality Assurance

Walker designs this converter to comply with EPA standards and to provide premium replacement performance for specific OBDII applications. Part number 14753 is built as a direct-fit emissions component for service replacement use.