NGK 91961 DILFR7K9G Laser Iridium Spark Plug for Lexus IS/NX/RC/GS 2.0L Turbo

Vehicle Fitment

• 2015-2017 Lexus NX200t (Base, F Sport, 2.0L I4 Turbo)
• 2018-2021 Lexus NX300 (Base, F Sport, Luxury, 2.0L I4 Turbo)
• 2016-2017 Lexus IS200t (Base, F Sport, 2.0L I4 Turbo)
• 2018-2023 Lexus IS300 (Base, F Sport, 2.0L I4 Turbo)
• 2016-2017 Lexus GS200t (Base, F Sport, 2.0L I4 Turbo)
• 2018-2019 Lexus GS300 (Base, F Sport, 2.0L I4 Turbo)
• 2016-2017 Lexus RC200t (Base, F Sport, 2.0L I4 Turbo)
• 2018-2023 Lexus RC300 (Base, F Sport, 2.0L I4 Turbo)

Fitment Notes

• Fits Lexus models equipped with the 8AR-FTS 2.0L I4 turbocharged engine only
• Does not fit Lexus IS300, RC300, or GS300 equipped with the 3.5L V6 engine
• 4 plugs required per vehicle
• OEM Lexus cross-reference: 90919-01276
• Plug is pre-gapped at 0.035"-0.036" (0.9mm); verify against your vehicle's service manual before installation

Features

• Dual Fine Electrode (DFE) design - iridium center and platinum ground electrodes for maximum ignitability
• Laser-welded fine-wire iridium alloy center electrode resists spark erosion and extends service life
• Platinum-tipped ground electrode provides even wear in modern distributorless ignition systems
• Pure alumina silicate ceramic insulator for superior strength and thermal management
• Trivalent metal shell plating delivers superior anti-corrosion and anti-seizing protection
• Triple seals prevent combustion gas leakage around the plug shell

Specifications

• NGK Part Number: DILFR7K9G
• Thread Diameter: 14mm
• Thread Pitch: 1.25mm
• Reach: 26.5mm (1.04")
• Hex Size: 5/8" (16mm)
• Seat Type: Gasket (Flat)
• Terminal Type: Solid
• Pre-Set Gap: 0.035"-0.036" (0.9mm)
• Center Electrode: Iridium Fine Wire, 0.6mm
• Ground Electrode: Platinum Fine Wire
• Resistor Value: 5K Ohm
• Heat Range: 7
• Torque Spec - Cast Iron Head: 18-25.3 lb-ft
• Torque Spec - Aluminum Head: 18-21.6 lb-ft

Included Components

• 1x NGK DILFR7K9G Laser Iridium Spark Plug (91961)

Product Description

The NGK 91961 (DILFR7K9G) is an OEM-grade Laser Iridium spark plug engineered specifically for Lexus vehicles equipped with the 2.0L I4 turbocharged 8AR-FTS engine, spanning the NX, IS, GS, and RC model lines from 2015 through 2023. Featuring NGK's Dual Fine Electrode (DFE) technology - a laser-welded iridium center electrode paired with a platinum-tipped ground electrode - this plug delivers superior ignitability and extended service life compared to standard platinum or nickel plugs.

This is a direct OE-equivalent replacement requiring no modifications. Four plugs are needed per vehicle. Buyers should confirm their vehicle is equipped with the 2.0L turbocharged engine, as several IS300, RC300, and GS300 models are available with the 3.5L V6, which requires a different plug.