Eastern Convertors 40300 Catalytic Converter

Direct-Fit Catalytic Converter for Audi and Volkswagen

Eastern Convertors Part Number 40300 is a Federal / EPA direct-fit undercar catalytic converter built for specific Audi A4, Audi A4 Quattro, and Volkswagen Passat applications. It uses an ECO III catalyst type and is configured with welded 3-bolt inlet and outlet connections for a direct replacement layout.

Key Features

• Federal / EPA direct-fit undercar catalytic converter
• ECO III catalyst type for emissions system replacement
• 3-bolt welded inlet and 3-bolt welded outlet design
• Includes 2 oxygen sensor ports
• Fits Federal and California emissions applications where listed
• Direct-fit format for Audi A4, Audi A4 Quattro, and Volkswagen Passat

Product Details

Eastern Convertors Direct Fit Converter line focuses on application-specific exhaust replacement parts that match the original undercar layout. Part Number 40300 is built for 2001-2006 Audi A4, 2001-2005 Audi A4 Quattro, and 1998-2005 Volkswagen Passat models, with fitment listed for Federal and California emissions configurations. The welded 3-bolt inlet and outlet connections support a factory-style exhaust interface, while the dual oxygen sensor ports maintain the sensor locations used in the vehicle’s emissions system.

This converter is a practical choice when replacing a restricted or failed catalytic converter on an Audi A4, Audi A4 Quattro, or Volkswagen Passat with the correct direct-fit undercar configuration. Part Number 40300 is intended for buyers searching for a Federal / EPA direct-fit catalytic converter for these specific chassis and model years.

What It Helps Address

• Check engine light related to catalyst efficiency faults
• Failed emissions inspection tied to converter performance
• Exhaust restriction from a deteriorated catalytic substrate
• Rattling or damaged converter internals
• Leak points at worn exhaust connection flanges

Installation Notes and Tips

Verify the vehicle’s emissions configuration, engine layout, and sensor placement before installation. Confirm the 3-bolt welded inlet and outlet style matches the existing exhaust connection points, and transfer or reconnect the oxygen sensors to the two provided ports as required by the application. For best results, inspect adjoining exhaust components, gaskets, and mounting surfaces before installing the new converter.

Quality Assurance

Eastern Convertors supplies direct-fit exhaust replacement components for application-specific use. Part Number 40300 is a Federal / EPA converter and is not CARB certified.