Ignition Coil and Iridium Spark Plugs for Lexus GS300 (2018-2019) 2.0L

Direct-Replacement Ignition Coil and Iridium Spark Plug Kit for 2018-2019 Lexus GS300

What it Does: The ignition coil and iridium spark plug kit restores secondary ignition voltage and core combustion efficiency on the 2018-2019 Lexus GS300 to eliminate misfires and stabilize boost delivery.

The Stock Lexus GS300 Thermal Breakdown and Dielectric Fatigue

In the turbocharged 8AR-FTS engine powering the ARL10 chassis, sustained high cylinder pressures combined with tight engine bay packaging accelerate ignition degradation. Factory pencil coils suffer dielectric breakdown as internal epoxy resins degrade under constant heat soak, leading to high-voltage arcing, micro-cracking in the primary/secondary windings, and hesitation under peak boost. Concurrently, factory spark plugs experience ground electrode erosion, widening the spark gap and forcing the coil to generate excessive kilovolt demands, which triggers intermittent P0300 through P0304 diagnostic trouble codes.

The Engineering Solution

This complete ignition overhaul kit features four high-dielectric pencil ignition coils engineered to replace OEM number 9091902269 (aftermarket UF916), paired with four fine-wire iridium spark plugs. The coils utilize premium copper winding wire and reinforced silicone boots to withstand localized heat soak up to 260°C without insulation breakdown or current leakage. The matched iridium plugs feature laser-welded fine-wire center electrodes and trivalent metal plating for anti-fouling and anti-seizing properties. This ensures a low quenching effect, rapid flame kernel propagation, and stable spark timing across the entire 1,650 to 4,400 RPM torque plateau.

Technical Specifications

Compatibility

• 2018 Lexus GS300 Base Sedan 4-Door 2.0L 1998cc I4 Turbo (8AR-FTS)
• 2018 Lexus GS300 F Sport Sedan 4-Door 2.0L 1998cc I4 Turbo (8AR-FTS)
• 2019 Lexus GS300 Base Sedan 4-Door 2.0L 1998cc I4 Turbo (8AR-FTS)
• 2019 Lexus GS300 F Sport Sedan 4-Door 2.0L 1998cc I4 Turbo (8AR-FTS)

Frequently Asked Questions

Does this fit the ARL10 GS300?
Yes, this is a direct fit for the 2018-2019 Lexus GS300 equipped with the 8AR-FTS engine.

Are the iridium spark plugs pre-gapped for direct installation?
Yes, the spark plugs are pre-gapped to factory factory tolerance, though verification with a feeler gauge prior to installation is recommended.

The Lexus Reliability Standard

Engineered to satisfy exacting Japanese luxury-sport tolerances, this ignition system delivers uncompromised combustion consistency, factory dwell angle compliance, and seamless ECU integration without throwing diagnostic trouble codes.