DENSO 3157 Double Platinum Spark Plug

The DENSO 3157 Double Platinum Spark Plug is an OE-grade replacement plug engineered for long service life and consistent ignition performance. Unlike conventional single-platinum plugs that use platinum only on the center electrode, this plug features platinum on both the center and ground electrodes, providing superior resistance to gap erosion and corrosion for extended plug life.

Key Features:

• Double Platinum Construction – Platinum-tipped center and ground electrodes minimize gap erosion for sustained performance over 60,000+ miles
• 360° Laser-Welded Platinum Tip – Precision bonding ensures a secure, durable platinum-to-electrode connection
• Copper Core Center Electrode – Enhances thermal conductivity, helping maintain optimal operating temperature
• Premium Shell with Machine-Rolled Threads – Reduces risk of cross-threading and seizing during installation
• Purified Alumina Powder Insulator – Five-rib design provides extreme thermal stress resistance and prevents flashover
• Reduced Required Secondary Voltage – Lower ignition voltage demand improves ignition efficiency and reduces misfires
• OEM-Matched Specifications – Designed to meet or exceed original equipment service interval requirements
• Ideal for Distributorless Ignition Systems (DIS) – Double platinum construction was purpose-built for the demands of DIS and coil-on-plug ignition architectures

Sold individually. The DENSO 3157 Double Platinum Spark Plug is the choice of professionals and DIYers who want a long-lasting, low-maintenance ignition solution backed by DENSO's legacy as a premier OE spark plug supplier.