Champion 353 Spark Plug

Champion Copper Plus 353 Spark Plug

Champion Copper Plus 353 is a resistor spark plug built for dependable ignition performance in a wide range of BMW, Mini, Porsche, Cadillac, and Saturn applications. Its copper core electrode supports strong conductivity and heat control, while the nickel center and ground electrode materials are selected for consistent wear characteristics.

For drivers searching for a Champion 353 spark plug for BMW 325i, BMW 330i, or Mini Cooper fitment, this plug is a direct secondary ignition service part with OE-style dimensions and a flat seat design.

Key Features

• Copper core electrode for improved conductivity and heat management
• Nickel center electrode tip and nickel copper alloy ground electrode construction
• Resistor type spark plug for ignition system noise suppression
• Pre-gapped to 0.020 in. / 0.5 mm
• Flat seat design with 14 mm thread diameter and 0.75 in. reach
• Three ground electrodes for stable spark delivery
• Champion Copper Plus classification

Product Line Details

Champion Copper Plus is the brand’s copper-core spark plug line focused on dependable everyday ignition service. The copper core helps transfer heat efficiently, which supports consistent firing characteristics and controlled plug temperature across normal driving conditions.

Detailed Description

Champion 353 is engineered as a secondary ignition spark plug with a non-removable nut terminal, hex size of 15.880 mm (0.625 in.), and a manufacturer heat range of 89. The plug type is RC89TMC, and the flat seat configuration supports the listed OE-style applications. This part cross-references Bosch FGR5KQE0 and FGR8KQE0 for the same application.

Compatible With 2001-2006 BMW 325Ci, 2001-2005 BMW 325i, 2001-2005 BMW 325xi, 2001-2006 BMW 330Ci, 2001-2005 BMW 330i, 2001-2005 BMW 330xi, 2002-2005 BMW 745i, 2002-2005 BMW 745Li, 2003-2005 BMW Z4, 2002-2008 Mini Cooper, and 2003-2006 Porsche Cayenne. It also fits additional BMW, Cadillac CTS, and Saturn Vue applications listed in the fitment data.

What It Helps Address

• Rough idle caused by worn spark plugs
• Hard starting from weak or inconsistent spark output
• Misfire conditions related to aged secondary ignition components
• Reduced throttle response from degraded plug performance
• Maintenance intervals requiring spark plug replacement

Installation Notes and Tips

Verify the plug type, thread diameter, reach, seat style, and heat range against the vehicle’s service specification before installation. Confirm the gap setting matches the engine requirement, since this plug is pre-gapped at 0.020 in. / 0.5 mm. Use proper spark plug service procedures and torque to the manufacturer’s specification for the engine.

Fitment includes 1996-2008 BMW 3 Series, 5 Series, 7 Series, X3, X5, Z3, Z8, and Z4 applications, plus 2002-2008 Mini Cooper, 2003-2006 Porsche Cayenne, 2003-2004 Cadillac CTS, and 2002-2003 Saturn Vue listings shown in the fitment table.

Quality Assurance

Champion manufactures this Copper Plus spark plug with a copper core electrode for conductivity and heat control, backed by the brand’s established ignition component engineering. The part is built to the listed specifications for direct replacement service in confirmed applications.