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Restore your engine’s factory-standard efficiency with the Denso SC16HR11 (3499) Iridium Long-Life Spark Plug. Designed as the Original Equipment Manufacturer (OEM) choice for a wide range of Toyota, Lexus, and Scion vehicles, this plug is engineered to provide the perfect balance of durability, fuel economy, and ignition reliability.
If you are performing a scheduled tune-up, choose the plug that was installed at the factory to ensure your engine runs as smoothly and reliably as the day it was new.
Genuine OEM Fitment: Guaranteed to match the exact specifications, heat range, and reach required by your Toyota/Lexus engine for optimal combustion.
Iridium Long-Life Technology: Featuring a fine-wire iridium center electrode, these plugs are built to last up to 100,000 miles, reducing the frequency of maintenance.
Superior Ignitability: The iridium construction provides a consistent, high-intensity spark, resulting in improved throttle response, smoother idling, and easier cold starts.
Maximized Fuel Efficiency: By ensuring a complete burn of the air-fuel mixture, this plug helps you maintain peak MPG—essential for daily drivers and high-mileage commuters.
Advanced Durability: Engineered to withstand the high temperatures and pressures of modern, high-efficiency engines, preventing misfires and protecting your ignition coils.
This spark plug is a high-demand component for popular models, including:
Toyota Corolla
Toyota Prius
Scion iM / xD
Lexus CT200h (Please verify your specific year and engine displacement in our compatibility tool to ensure a perfect match.)
Part Number: SC16HR11 / 3499
OEM Reference: 90919-01275 / 90919-01253
Material: Iridium Center Electrode
Design: Long-Life / High-Ignitability
Installation Note: Pre-gapped at the factory. Do not attempt to adjust the gap, as the fine-wire electrode is delicate.
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