NGK 90873 Spark Plug

NGK Laser Iridium Spark Plug 90873

NGK Laser Iridium Spark Plug 90873 is built for OE-style ignition performance and long service life. It uses an iridium-tipped center electrode, a platinum ground electrode tip, and a copper core to support reliable starts and stable combustion in daily driving and service intervals.

Compatible With 2017-2020 Ford Fusion and 2021-2024 Lincoln Corsair applications, this spark plug is a direct-fit ignition service part for vehicles specified with NGK service number ILTR6J13. The tapered seat, M14 x 1.25 thread, and 0.984-inch reach support proper cylinder head fitment where this plug is specified.

Key Features

• Laser Iridium spark plug from NGK
• Part number 90873; service number ILTR6J13
• Iridium fine-wire center electrode for durable spark delivery
• Platinum pad on the ground electrode for even wear in distributorless ignition systems
• High-grade ceramic insulator and copper core help manage heat
• 5,000 ohm resistor design for ignition noise control
• Pre-gapped to 0.052 in. / 1.3 mm
• Tapered seat, M14 x 1.25 thread, 5/8 in. hex

Laser Iridium Product Line

NGK Laser Iridium plugs are engineered for OE applications where consistent ignition performance and long wear intervals matter. The iridium center electrode is paired with a platinum ground tip to promote even electrode wear, while the ceramic insulator and copper core help control operating temperature during repeated heat cycles.

Detailed Description

NGK 90873 is a Laser Iridium spark plug designed around OE specifications for select Ford and Lincoln engines. The fine-wire iridium center electrode supports efficient spark formation, while the platinum ground electrode tip helps maintain wear characteristics in distributorless ignition systems. With a resistor design, 0.14-inch center electrode projection, and a manufacturer heat range of 6, this plug is built for controlled ignition performance in the applications listed below.

Fits 2017-2020 Ford Fusion, N/A. Fits 2021 Lincoln Corsair, N/A. Fits 2022-2024 Lincoln Corsair, N/A. This part cross-references Dorman - HELP 90873 for the same application.

What It Helps Address

• Hard starting caused by worn spark plug electrodes
• Misfire conditions related to degraded ignition performance
• Rough idle from inconsistent spark delivery
• Reduced fuel efficiency from inefficient combustion
• Service interval replacement for OE-specified ignition maintenance

Installation Notes and Tips

Verify the engine application against the vehicle service information before installation. Confirm the tapered seat, thread size, reach, and pre-gap specification match the original plug requirement. Use proper spark plug removal and installation procedures to avoid thread damage in the cylinder head, and torque to the manufacturer specification for the engine.

Quality Assurance

NGK tests Laser Iridium spark plugs to OE-level standards for quality and durability. The iridium center electrode, platinum ground tip, ceramic insulator, and copper core are selected to support consistent operation under normal service conditions.