Denso 3518 Spark Plug

Reliable Ignition Performance for Lexus and Toyota Vehicles

The Denso Spark Plug - Iridium Long Life (SIP) 3518 is engineered to provide consistent ignition and enhanced durability for select Lexus and Toyota models. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and long-term engine reliability.

• Iridium center electrode tip for improved ignition and wear resistance
• Platinum needle ground electrode tip for precise spark delivery
• Needle-to-needle ground configuration for optimal spark gap stability
• Copper core center electrode for excellent thermal conductivity
• Flat seat type with 26.5 mm reach for secure fitment
• Pre-gap size of 0.8 mm for accurate spark gap
• Heat range rating of 20 suitable for specified engine conditions
• Hex size of 14.3 mm for standard installation tools

About the Spark Plug - Iridium Long Life (SIP) Product Line

The Spark Plug - Iridium Long Life (SIP) line from Denso focuses on delivering extended service life and stable ignition performance. Utilizing iridium and platinum materials in the electrode tips, these spark plugs are designed to maintain consistent spark quality over time, reducing the need for frequent replacements. The combination of copper and nickel core materials ensures efficient heat dissipation and durability under various operating conditions.

Technical Details and Specifications

This Denso spark plug features a single ground electrode with a platinum needle tip, paired with an iridium-tipped center electrode supported by a copper core. The needle-to-needle ground configuration enhances spark precision, contributing to smoother engine operation. With a manufacturer heat range of 20 and a flat seat design, the plug is optimized for the ignition systems of Lexus and Toyota models such as the Corolla, Corolla Cross, and UX200. The 0.8 mm pre-gap size and 26.5 mm reach ensure proper combustion chamber fitment and spark gap consistency.

Compatible Vehicles and Common Applications

• Replacement spark plug for Lexus UX200 ignition systems
• Ignition component for Toyota Corolla and Corolla Cross engines
• Addressing issues like misfires and rough idling in compatible models
• Helps improve fuel efficiency by maintaining optimal spark timing
• Supports stable engine starts and consistent acceleration response

Installation Notes and Tips

When installing the Denso 3518 spark plug, ensure the pre-gap of 0.8 mm is maintained for optimal performance. Use a 14.3 mm socket wrench to tighten the plug to the manufacturer’s recommended torque specifications. The flat seat design requires proper seating to avoid compression leaks. It is advisable to inspect the ignition system components during replacement to ensure compatibility and prevent premature wear.

Quality Assurance and Warranty

Denso manufactures the Spark Plug - Iridium Long Life (SIP) 3518 to meet strict quality standards, ensuring reliable ignition performance and durability. While specific warranty details are not provided, Denso’s reputation for OEM-quality parts supports confidence in product longevity and consistent operation within the specified Lexus and Toyota models.