Denso 3457 Spark Plug

Overview of Denso Iridium Long Life (SIP) Spark Plug 3457

The Denso Iridium Long Life (SIP) spark plug, part number 3457, is engineered for reliable ignition performance in select Infiniti, Mercedes-Benz, Nissan, and Subaru vehicles. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and engine responsiveness.

• Iridium center electrode tip for enhanced durability and consistent spark
• Platinum needle ground electrode tip with needle-to-needle configuration
• Copper core center electrode for optimal conductivity
• Nickel ground electrode core material for strength
• Pre-gap size of 1.1 mm for precise ignition timing
• Flat seat type with 12 mm thread diameter and 26.50 mm reach
• Manufacturer heat range rating of 24 suitable for high-performance applications
• Hex size of 14.3 mm for standard installation tools

Detailed Product Features and Specifications

The Denso 3457 spark plug features an iridium center electrode tip, which provides a fine electrode for improved ignition and longer service life compared to conventional plugs. The copper core center electrode enhances electrical conductivity, ensuring efficient energy transfer. The ground electrode uses a platinum needle tip in a needle-to-needle configuration, which helps maintain a stable spark and reduces misfires. The nickel core ground electrode adds durability under high-temperature conditions.

With a pre-gap size of 1.1 mm, this spark plug is optimized for precise ignition timing, contributing to smoother engine operation. The flat seat design and 12 mm thread diameter ensure compatibility with the specified vehicle models. The 26.50 mm reach and heat range of 24 make it suitable for engines requiring moderate heat dissipation, such as those found in Infiniti 370Z, Nissan GT-R, Subaru WRX, and Mercedes-Benz SLS AMG.

About the Iridium Long Life (SIP) Product Line

The Iridium Long Life (SIP) line from Denso focuses on delivering extended durability and consistent ignition performance through the use of iridium and platinum electrode materials. This product line is designed to meet the demands of modern engines by providing stable spark delivery and resistance to electrode wear, which helps maintain engine efficiency over time. The 3457 spark plug exemplifies these qualities with its advanced electrode design and materials.

Compatible Vehicles and Common Applications

• Compatible with Infiniti models including 370Z, EX37, G37, M37, Q40, Q50, Q60, Q70, Q70L, QX50, and QX70
• Fits Nissan models such as GT-R and FX37
• Suitable for Subaru Forester and WRX
• Compatible with Mercedes-Benz SLS AMG
• Addresses ignition issues like misfires, rough idling, poor fuel economy, and hard starts

Installation Notes and Tips

• Use a 14.3 mm socket wrench for installation or removal
• Ensure the pre-gap of 1.1 mm is maintained or adjusted as needed before installation
• Apply anti-seize compound on threads if recommended by the vehicle manufacturer
• Torque to manufacturer specifications to avoid damage to the spark plug or cylinder head
• Inspect ignition coils and wiring for proper function during replacement

Quality Assurance and Warranty

Denso spark plugs, including part number 3457, are manufactured to meet strict quality standards for performance and durability. While specific warranty details may vary by region or retailer, Denso products typically come with a limited warranty covering defects in materials and workmanship. Always refer to the product packaging or official documentation for exact warranty terms.