Champion 9901 Spark Plug

Champion Iridium Spark Plug 9901

Champion Iridium 9901 is a tapered-seat spark plug built with a fine-wire iridium center electrode and a platinum ground electrode for a focused spark event. It is engineered for direct-fit service on a wide range of Ford, Lincoln, Chevrolet, Cadillac, GMC, Mazda, and other applications listed below.

The Champion Iridium line is positioned for drivers who want precise ignition performance from a modern iridium plug design. Part number 9901 uses a resistor design, a J-gap ground electrode tip, and a pre-gap of 0.047 in. / 1.20 mm, with OE-style fitment references for many late-model and earlier vehicles.

Key Features

• Fine-wire iridium center electrode for sharp spark focus
• Platinum ground electrode core for durable ignition performance
• J-gap ground electrode tip design
• Resistor type spark plug
• Tapered seat design
• 14 mm thread diameter with 0.984 in. reach
• Champion Iridium classification, part number 9901

Product Details

Champion Iridium 9901 is built around a small-diameter iridium center electrode and a platinum ground electrode to help maintain consistent spark delivery under demanding engine conditions. The tapered seat, 0.625 in. hex size, and non-removable nut terminal support OE-style serviceability, while the listed plug type RE10WYPB5 helps identify the correct application. This part cross-references NGK 5476 and Bosch HR8NPP302 for the same application.

For shoppers searching long-tail fitment terms, this spark plug fits 2017-2022 Ford F-150, 2020-2022 Ford Explorer, and 2013-2020 Lincoln MKZ applications listed in the fitment data. It also covers additional Ford, Lincoln, Chevrolet, Cadillac, GMC, Mazda, and related models across the 1995-2022 model years.

Common Reasons to Replace

• Rough idle or inconsistent combustion
• Hard starting or extended crank time
• Misfire codes related to worn spark plugs
• Reduced throttle response from aged ignition components
• Loss of fuel economy caused by degraded spark quality

Installation Notes

Verify the plug type, seat style, and gap specification against the vehicle service information before installation. Several listed Ford Super Duty applications note 2 plugs per cylinder required, and fitment notes vary by engine family and model year. Use the application-specific gap shown in the fitment data when servicing Ford F-150, Ford Explorer, Lincoln MKZ, Chevrolet Traverse, and other listed vehicles.

For best results, inspect ignition coils, boots, and wiring before installing new plugs. Confirm the correct torque procedure for tapered-seat plugs and avoid over-gapping the iridium center electrode.

Quality Assurance

Champion Iridium spark plugs are built to Champion’s OE-focused standards for secondary ignition service. Part number 9901 is specified with detailed dimensional and material data to support accurate replacement selection for compatible Ford F-150, Ford Explorer, and Lincoln MKZ applications.