Champion 9803 Spark Plug

Champion Iridium Spark Plug 9803 Overview

Champion Iridium 9803 is a secondary ignition spark plug built for precise spark delivery and stable combustion. Its fine-wire iridium center electrode and platinum ground electrode focus the spark for consistent performance in compatible Audi, Porsche, Honda, and Volvo applications.

The Champion Iridium line is engineered for drivers who want a modern iridium plug with durable electrode materials and OE-style fitment. For vehicles such as the Audi A4, Audi A6, Porsche 911, and Honda Civic, this plug supports direct replacement service where the specified RC8WMPB4 plug type is called for.

Key Features

• Fine-wire iridium center electrode for sharp spark focus
• Platinum ground electrode with J-gap design
• Resistor-type construction for ignition system noise control
• Flat seat design with 14 mm thread diameter and 0.75 in reach
• Pre-gapped at 0.041 in for applications that match the listed specification
• Champion Iridium 9803 cross-references select OE and aftermarket part numbers for the same application

Detailed Product Description

Champion Iridium 9803 uses an iridium center electrode paired with a platinum ground electrode to create a focused spark kernel and support reliable ignition performance. The J-gap ground electrode design and non-removable nut terminal reflect an OE-style spark plug configuration, while the resistor design helps maintain clean electrical operation in modern ignition systems. This plug is identified as RC8WMPB4 and is listed across multiple import applications, including Audi A4, Audi A6, Porsche 911, Porsche Boxster, Honda Civic, and Volvo S60.

This part cross-references Bosch FR7KI332S for the same application.

Vehicle Fitment

• Fits 2005-2009 Audi A4 Quattro, N/A; gap 0.035 in; plug type RC8WMPB4; Champion Iridium
• Fits 2006-2008 Audi A4, N/A; OE type; gap 0.040 in; plug type RC8WMPB4; Champion Iridium
• Fits 2006-2008 Audi A6, N/A; gap 0.036 in; plug type RC8WMPB4; Champion Iridium
• Fits 2005-2008 Audi A6 Quattro, N/A; gap 0.040 in; plug type RC8WMPB4; Champion Iridium
• Fits 2007-2008 Porsche 911, N/A; gap 0.039 in; plug type RC8WMPB4; Champion Iridium
• Fits 2007-2008 Porsche Boxster, N/A; gap 0.039 in; plug type RC8WMPB4; Champion Iridium
• Fits 2003-2006 Porsche 911, N/A; gap 0.044 in; plug type RC8WMPB4; Champion Iridium
• Fits 2001-2005 Honda Civic, N/A; gap 0.044 in; plug type RC8WMPB4; Champion Iridium
• Fits 2004-2005 Volvo S60, N/A; Champion Iridium
• Fits 2003 Volvo S60, N/A; gap 0.030 in; plug type RC8WMPB4; Champion Iridium
• Fits 2002 Porsche 911, N/A; gap 0.040 in; plug type RC8WMPB4; Champion Iridium
• Fits 1999-2001 Porsche 911, N/A; gap 0.032 in; plug type RC8WMPB4; Champion Iridium
• Fits 1989-1998 Porsche 911, N/A; 2 plugs per cylinder required; gap 0.032 in; plug type RC8WMPB4; Champion Iridium

Installation Notes

• Verify the plug type, thread diameter, reach, seat type, and gap specification before installation.
• Check the vehicle service information for the correct gap setting, since listed applications vary by model year.
• Use proper spark plug service procedures to avoid thread damage in aluminum cylinder heads.
• Confirm the ignition system is in good condition before replacing plugs on Audi A4, Audi A6, Porsche 911, or Honda Civic applications.

Quality Assurance

Champion Iridium 9803 is built with iridium and platinum electrode materials for durable spark plug service in the listed applications. The product line is positioned for precise ignition performance and OE-style replacement use in compatible vehicles.