Denso 3458 Spark Plug

Overview of Denso Iridium Long Life (SIP) Spark Plug 3458

The Denso Iridium Long Life (SIP) spark plug, part number 3458, is engineered for reliable ignition performance in select Hyundai and Kia vehicles. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and engine longevity.

• Iridium center electrode tip for enhanced durability
• Platinum needle ground electrode tip design
• Needle-to-needle ground configuration for consistent spark
• Copper core center electrode for optimal conductivity
• Flat seat type with 14.00 mm thread diameter and 26.50 mm reach
• Pre-gap size of 1.1 mm for precise ignition timing
• Hex size of 16.0 mm for standard installation tools
• Manufacturer heat range of 16 suitable for specified vehicle models

Details on the Iridium Long Life (SIP) Product Line

The Iridium Long Life (SIP) line from Denso focuses on delivering extended service life and stable ignition performance. Utilizing iridium for the center electrode tip and platinum for the ground electrode tip, this product line balances wear resistance with efficient spark generation. The combination of these materials helps maintain consistent ignition over time, making it suitable for vehicles requiring durable secondary ignition components.

Technical Description and Specifications

This spark plug features a copper core center electrode that enhances thermal conductivity, supporting rapid heat dissipation during operation. The ground electrode uses a nickel core with a platinum needle tip, arranged in a needle-to-needle configuration to ensure a precise and stable spark. The pre-gap size of 1.1 mm is factory set to optimize ignition timing and combustion efficiency. With a thread diameter of 14.00 mm and a reach of 26.50 mm, it fits securely in the combustion chamber. The flat seat type and 16.0 mm hex size facilitate straightforward installation and removal.

Compatible Vehicles and Common Applications

• Hyundai Forte and Forte Koup
• Hyundai Optima and Sonata
• Hyundai Santa Fe and Tucson
• Kia Rondo, Sorento, and Sportage

This spark plug is designed to address issues such as misfires, rough idling, reduced fuel efficiency, hard starting, and poor acceleration in the listed Hyundai and Kia models.

Installation Notes and Tips

• Ensure the spark plug gap is set to 1.1 mm before installation if adjustment is necessary
• Use a 16.0 mm socket wrench for proper torque application
• Apply anti-seize compound sparingly on threads to prevent galling
• Follow manufacturer torque specifications to avoid damage to the cylinder head
• Inspect ignition components for wear during replacement

Quality Assurance and Warranty

Denso manufactures this spark plug to meet OEM standards for fit, form, and function. The use of iridium and platinum materials contributes to extended service intervals compared to conventional spark plugs. While specific warranty details are not provided here, Denso products typically come with manufacturer-backed quality assurance to support reliable performance in compatible Hyundai and Kia vehicles.