Ignition Coil and Iridium Spark Plugs for Lexus IS300 (2018-2020) 2.0L

Direct-Fit Ignition Coil and Iridium Spark Plug Kit for 2018-2020 Lexus IS300

What it Does: The Ignition Coil and Iridium Spark Plugs kit restores factory spark energy and ignition timing consistency on the 2018-2020 Lexus IS300 to eliminate high-boost misfires and rough idling.

The Stock Lexus IS300 Dielectric Breakdown and Spark Blowout

The turbocharged, direct-injected 8AR-FTS engine in the ASE30 chassis operates under high cylinder pressures and elevated under-hood thermal loads. Over time, heat soak deep within the spark plug wells degrades the factory pencil coil epoxy resin, causing microscopic fractures and secondary dielectric breakdown. Concurrently, factory electrode gap erosion increases resistance, which overworks aging coil windings and leads to intermittent ignition breakdown, erratic idle, reduced fuel economy, and P0300-P0304 misfire codes under hard acceleration.

The Engineering Solution

This complete ignition kit directly addresses these thermal and electrical vulnerabilities. The ignition coils feature high-conductivity copper windings insulated with premium silicone potting to resist heat-induced resistance spikes and prevent voltage leakage. Paired with laser-welded fine-wire iridium spark plugs, the assembly delivers a concentrated, stable spark kernel designed to prevent spark blowout under peak manifold pressure. This kit adheres strictly to factory dwell profiles and terminal impedance, directly replacing OEM part numbers 90919-02269 and UF916.

Technical Specifications

Compatibility

• 2018 Lexus IS300 Base 2.0L Turbo I4 RWD (ASE30)
• 2018 Lexus IS300 F Sport 2.0L Turbo I4 RWD (ASE30)
• 2019 Lexus IS300 Base 2.0L Turbo I4 RWD (ASE30)
• 2019 Lexus IS300 F Sport 2.0L Turbo I4 RWD (ASE30)
• 2020 Lexus IS300 Base 2.0L Turbo I4 RWD (ASE30)
• 2020 Lexus IS300 F Sport 2.0L Turbo I4 RWD (ASE30)

Frequently Asked Questions

Does this fit the ASE30 IS300?
Yes, this is a direct fit for the 2018-2020 Lexus IS300 equipped with the 8AR-FTS engine.

Are the included iridium spark plugs pre-gapped for turbo operation?
Yes, the spark plugs are pre-gapped to the factory specification of 0.031 inches (0.8 mm) for direct drop-in installation.

The Lexus Precision Standard

Engineered to preserve the smooth power delivery and dynamic throttle response expected from a rear-wheel-drive Japanese sport sedan, this ignition package ensures complete combustion and eliminates drivability faults under load.