Champion 9665 Spark Plug

Champion Iridium Spark Plug 9665

Champion Iridium 9665 is a tapered-seat spark plug built for precise ignition performance in a range of GM applications. Its fine-wire iridium center electrode and platinum ground electrode are engineered to sharpen spark focus for consistent combustion response in compatible vehicles.

Key Features

• Fine-wire iridium center electrode for focused spark delivery
• Platinum ground electrode core for durable ignition performance
• J-gap ground electrode tip design
• Pre-gapped to 0.026 in. for listed OE-style applications
• Resistor design for ignition system noise control
• Tapered seat construction
• Non-removable nut terminal
• Champion Iridium line for OE-style secondary ignition service

Product Details

Champion Iridium 9665 is a secondary ignition spark plug designed around a 0.470 in. thread diameter, 14 mm hex size, and manufacturer heat range 4. The iridium center electrode and platinum ground electrode work together to support a sharp spark event, while the J-gap configuration helps maintain consistent ignition characteristics in the specified applications. This part cross-references NGK 94051 and Carlson 41125 for the same application.

Compatible With 2016-2022 Chevrolet Spark, 2016-2019 Chevrolet Malibu, 2016-2019 Chevrolet Volt, 2016-2019 Buick Encore, 2016-2019 Buick Cascada, 2016-2018 Chevrolet Cruze, 2018-2022 GMC Terrain, 2019 Chevrolet Cruze, 2019-2022 Chevrolet Equinox, 2020-2022 Buick Encore GX, 2020-2021 Chevrolet Malibu, 2021-2022 Buick Encore, 2021-2022 Chevrolet Trailblazer, 2021 Chevrolet Trax, 2022 Chevrolet Trax, 2022-2023 Chevrolet Malibu, 2023 Buick Encore GX, 2023 Chevrolet Equinox, 2023 Chevrolet Trailblazer, and 2023 GMC Terrain. Champion Iridium 9665 also matches OE-type service needs on select 2016-2023 Chevrolet, Buick, and GMC models listed in the fitment data.

What It Helps Address

• Rough idle caused by worn spark plug electrodes
• Hard starting from weak or inconsistent spark output
• Misfire conditions related to plug wear or incorrect gap
• Reduced throttle response from degraded ignition performance
• Fuel economy loss tied to inefficient combustion

Installation Notes and Tips

Verify the listed vehicle application before installation and confirm the specified gap where OE notes call for 0.026 in. or 0.032 in. Use the correct torque procedure for tapered-seat spark plugs and inspect ignition coils, boots, and wiring during service. For best results, replace plugs according to the vehicle maintenance schedule and keep the ignition system clean and dry during installation.

Quality Assurance

Champion Iridium plugs are built for OE-style secondary ignition service with iridium and platinum electrode materials selected for stable spark delivery and long-term wear resistance in the listed applications.