Denso 3437 Spark Plug

Reliable Ignition Performance for Chrysler, Dodge, and Mitsubishi Vehicles

The Denso Iridium Long Life 3437 spark plug is engineered to provide consistent ignition and enhanced durability for select Chrysler, Dodge, and Mitsubishi models. Designed with precision materials, this spark plug supports efficient combustion and long-term engine reliability.

• Iridium center electrode tip for improved wear resistance
• Copper core center electrode for optimal conductivity
• Nickel ground electrode core with standard tip design
• Flat seat type with 14mm thread diameter and 19mm reach
• Pre-gap size of 0.8 mm for precise spark delivery
• Hex size of 16.0 mm for standard installation tools
• Manufacturer heat range rating of 16 for balanced thermal performance

Detailed Features of the Denso Iridium Long Life 3437 Spark Plug

This spark plug features an iridium center electrode tip, which offers enhanced durability and consistent spark generation compared to conventional materials. The copper core center electrode improves electrical conductivity, supporting efficient ignition and fuel combustion. The ground electrode is constructed with a nickel core and a standard tip design, providing reliable grounding and spark gap stability. With a pre-gap size of 0.8 mm and a single ground electrode, the spark plug ensures precise ignition timing and performance. The flat seat design and 14 mm thread diameter make it compatible with a range of engines, while the 19 mm reach fits specific combustion chamber configurations. The heat range of 16 is calibrated to maintain optimal operating temperature, preventing fouling and overheating.

About the Iridium Long Life Product Line

The Denso Iridium Long Life series is designed to extend spark plug service intervals by utilizing iridium, a durable and heat-resistant metal, on the center electrode tip. This technology enhances ignition stability and wear resistance, making it suitable for vehicles requiring reliable secondary ignition components. The 3437 part number is part of this line, offering a balance of longevity and performance for compatible Chrysler, Dodge, and Mitsubishi models.

Compatible Vehicles and Common Applications

• Chrysler Sebring and Stratus models requiring secondary ignition spark plugs
• Dodge Eclipse vehicles with specific ignition system needs
• Mitsubishi Lancer and Outlander models compatible with 14 mm thread diameter plugs
• Replacement for worn or fouled spark plugs causing misfires or rough idling
• Addressing ignition-related issues such as poor fuel economy or hard starts

Installation Notes and Tips

When installing the Denso Iridium Long Life 3437 spark plug, ensure the pre-gap size of 0.8 mm is maintained for optimal performance. Use a 16 mm socket wrench to tighten the spark plug to the manufacturer’s torque specifications. Verify the flat seat type matches the engine’s cylinder head design to ensure proper sealing. It is recommended to inspect ignition components and replace spark plugs in sets to maintain balanced engine operation.

Quality Assurance and Warranty Information

Denso manufactures the 3437 spark plug to meet strict quality standards, ensuring consistent performance and durability. The use of iridium and copper materials supports long service life under normal operating conditions. While specific warranty details are not provided, Denso products typically adhere to industry standards for automotive ignition components.