Dorman 674-487 Catalytic Converter - Rear

OE-Style Rear Catalytic Converter

Dorman 674-487 is a specific-fit catalytic converter engineered to match original equipment fit and function on select Nissan applications. It is built with a stainless steel body and silicon carbide substrate for a direct replacement on the rear exhaust position.

Compatible With 2002-2006 Nissan Altima, rear; 2004-2008 Nissan Maxima, rear; and 2004-2006 Nissan Quest, rear. This part number, 674-487, is a practical replacement when the original converter is worn, restricted, or no longer performing as expected.

Key Features

• Specific-fit design for select Nissan rear exhaust applications
• Stainless steel body construction
• Silicon carbide substrate material
• Flanged inlet and outlet for OE-style connection points
• Includes inlet gasket, outlet gasket, and installation hardware
• Natural finish with standard replacement grade
• One sensor port and no air tube count

Detailed Product Overview

Dorman 674-487 is built as a direct replacement catalytic converter for the rear position on select Nissan Altima, Maxima, and Quest models. The cylinder-style body measures 4 inches by 4 inches, with an overall length of 14 inches, and uses flanged inlet and outlet ends to match the original exhaust layout. The converter is not CARB certified, so it is intended for vehicles and regions where that specification is acceptable.

This part cross-references Bosch 16438 for the same application. For buyers searching for a rear catalytic converter for 2002-2006 Nissan Altima, 2004-2008 Nissan Maxima, or 2004-2006 Nissan Quest, 674-487 provides an OE-style replacement path with the listed fitment and connection style.

Common Problems This Part Can Address

• Failed or inefficient rear catalytic converter
• Exhaust restriction from a damaged substrate
• Check engine light related to catalyst performance
• Exhaust leaks at the converter connection points
• Corrosion or deterioration of the original converter body

Installation Notes

Verify the rear position, flange style, inlet and outlet diameters, and sensor-port layout before installation. Use the included inlet gasket, outlet gasket, and hardware as specified by the vehicle service procedure. Because this converter is specific fit, confirm the exact year, make, and model before ordering.

Quality Assurance

Dorman designs this catalytic converter to match original equipment fit and function on the listed vehicles. The stainless steel body and standard replacement construction support a direct-fit repair for the confirmed Nissan applications.