Walker 83259 Catalytic Converter - Rear

CARB-Compliant Rear Catalytic Converter

Walker CalCat 83259 is a direct-fit catalytic converter built for 2007-2009 Nissan Altima rear applications. It is CARB certified for use in California and other states that require CARB-compliant replacement converters, with an OE-style fit that follows the original exhaust layout.

Walker CalCat focuses on direct-fit replacement coverage for OBDII and non-OBD vehicles, and this unit is engineered around the specific rear fitment used on the Nissan Altima. The stainless steel body, ceramic substrate, and welded flange connections support a precise installation on the listed applications.

Key Features

• Fits 2007-2009 Nissan Altima, rear
• Walker CalCat direct-fit design for OE-style replacement
• CARB Executive Order D-182-63 for California and other CARB states
• Stainless steel body with ceramic substrate
• 3-bolt welded flange inlet and 2-bolt welded flange outlet
• Pre-catalyst oxygen sensor location
• Round body design with 48.5-inch overall length
• Walker 83259 for targeted rear exhaust replacement

Detailed Description

Walker 83259 is a specific-fit catalytic converter for the rear position on 2007, 2008, and 2009 Nissan Altima models. It is designed to match the OE-style exhaust configuration with a 3-bolt welded flange inlet, 2-bolt welded flange outlet, and a 2.52-inch outlet outside diameter. The round stainless steel body measures 4 inches high, 4 inches wide, and 8 inches long, with a 48.5-inch overall length.

This CalCat converter is CARB certified and listed under Executive Order D-182-63 for the covered Altima engine families. It is intended for vehicles that require a compliant replacement converter in California and other CARB-regulated states. Walker 83259 is a direct-fit catalytic converter for the Nissan Altima rear exhaust path, and it is identified for 2007-2009 Nissan Altima applications.

This part cross-references Walker 83259 for the same application.

Common Problems It Can Address

• Failed catalytic converter emissions testing
• Check engine light related to catalyst efficiency faults
• Restricted exhaust flow from a worn converter
• Corrosion or damage to the original rear converter assembly
• Need for a CARB-compliant replacement on a Nissan Altima

Installation Notes and Tips

Fits 2007-2009 Nissan Altima, rear. Confirm the engine family number and CARB application details before installation, especially for California and other regulated states. Additional parts 31355 and 31540 are listed as needed to complete installation on the covered applications. Verify flange alignment, sensor placement, and exhaust sealing surfaces before final tightening.

Quality Assurance

Walker CalCat converters are designed, tested, and validated to meet CARB standards for the listed applications. This part is built as a direct-fit replacement with OE-style fitment and CARB certification for the specified Nissan Altima coverage.