Denso 3485 Spark Plug

Overview of Denso 3485 Spark Plug for Toyota Prius C

The Denso Iridium Long Life (SIP) spark plug, part number 3485, is engineered for reliable ignition performance in the Toyota Prius C. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and long service life.

• Iridium center electrode tip for enhanced durability
• Platinum needle ground electrode tip design
• Needle-to-needle ground configuration for consistent spark
• Copper center electrode core for optimal conductivity
• Flat seat type with 14.00 mm thread diameter
• Pre-gap size of 0.8 mm and 19.00 mm reach
• Hex size of 16.0 mm for standard installation tools
• Manufacturer heat range rating of 16
• Single ground electrode with nickel core material
• Resistance value of 5000 ohms for noise suppression

Details on the Iridium Long Life (SIP) Product Line

The Iridium Long Life (SIP) line from Denso focuses on spark plugs that combine iridium and platinum materials to extend service intervals and maintain stable ignition. This product line is designed to meet the demands of modern engines like the Toyota Prius C, providing consistent performance and resistance to electrode wear.

Technical Description of Denso 3485 Spark Plug

The Denso 3485 spark plug features an iridium center electrode tip, known for its high melting point and wear resistance, which contributes to longer spark plug life. The copper core center electrode enhances electrical conductivity, improving ignition efficiency. The ground electrode uses a platinum needle tip in a needle-to-needle configuration, which helps maintain a precise spark gap and consistent ignition. With a pre-gap size of 0.8 mm and a flat seat design, this spark plug ensures proper sealing and optimal combustion chamber fitment. The 14.00 mm thread diameter and 19.00 mm reach are compatible with the Toyota Prius C engine specifications. Additionally, the 5000 ohm resistance helps reduce electromagnetic interference with vehicle electronics.

Compatible Applications and Common Issues Addressed

• Compatible with Toyota Prius C models requiring part number 3485 spark plugs
• Helps resolve misfires and rough idling caused by worn spark plugs
• Improves cold start performance and throttle response
• Reduces engine hesitation and incomplete combustion
• Supports fuel efficiency by maintaining consistent ignition

Installation Notes and Tips

When installing the Denso 3485 spark plug, ensure the engine is cool to prevent thread damage. Use a torque wrench to tighten the spark plug to the manufacturer’s recommended specification to avoid over-tightening. Verify the pre-gap size of 0.8 mm before installation, although the plug comes pre-gapped. The 16.0 mm hex size allows for standard spark plug sockets. Proper installation will help maintain the spark plug’s performance and longevity.

Quality Assurance and Warranty Information

Denso spark plugs, including the 3485 model, are manufactured to meet strict quality standards for durability and performance. The use of iridium and platinum materials ensures resistance to electrode wear and corrosion. While specific warranty details may vary, Denso products typically come with manufacturer-backed quality assurance to support reliable operation in compatible vehicles such as the Toyota Prius C.