Denso 5337 Spark Plug

Overview of Denso Iridium Power Spark Plug 5337

The Denso Iridium Power spark plug 5337 is engineered for reliable ignition performance in select Dodge, Ferrari, Fiat, and Jeep models. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and engine responsiveness.

• Iridium center electrode tip for enhanced durability and ignition
• Tapercut, u-groove ground electrode tip design for improved spark exposure
• Copper core center electrode for optimal conductivity
• Nickel ground electrode core material with standard ground configuration
• Pre-gap size of 0.9 mm for precise spark gap
• Flat seat type with 19.00 mm reach and 12.00 mm thread diameter
• Hex size of 16.0 mm for installation compatibility
• Manufacturer heat range rating of 27
• Resistance rating of 5000 ohms to reduce electrical noise

Detailed Product Features and Specifications

The Denso Iridium Power 5337 spark plug incorporates a copper core center electrode with an iridium tip, which provides a balance of excellent conductivity and wear resistance. The ground electrode features a tapercut, u-groove design that enhances spark exposure and combustion efficiency. With a single ground electrode made from nickel, the spark plug maintains durability under various operating conditions. The flat seat type and 19 mm reach ensure proper fitment and sealing in compatible engines. The 0.9 mm pre-gap size is factory set to optimize ignition performance, while the 5000 ohm resistance helps minimize electromagnetic interference with vehicle electronics.

Compatible Vehicles and Applications

This spark plug is compatible with a range of vehicles including Dodge Dart and Jeep Renegade, as well as several Ferrari models such as the 456 GT, 456 GTA, 456 M, 456 M GT, 456 M GTA, and 550 Maranello. It also fits Fiat models including the 124 Spider, 500, 500L, and 500X. The Denso Iridium Power 5337 is designed to meet the ignition requirements of these specific makes and models, ensuring proper engine performance and reliability.

Common Issues Addressed by This Spark Plug

• Misfires and rough idling due to worn or inefficient spark plugs
• Reduced fuel efficiency caused by incomplete combustion
• Difficulty starting the engine in cold or damp conditions
• Engine hesitation or lack of power during acceleration
• Interference with onboard electronics from spark plug resistance

Installation Notes and Tips

Before installation, verify the spark plug gap is set to 0.9 mm as specified. Use a 16 mm socket wrench for proper torque application. Ensure the flat seat type matches the engine’s cylinder head design to prevent leaks. Avoid over-tightening to protect the thread diameter of 12 mm and maintain the integrity of the spark plug. It is recommended to replace spark plugs in sets to maintain consistent engine performance.

Quality Assurance and Warranty

Denso manufactures the Iridium Power spark plug 5337 to meet strict quality standards, ensuring durability and consistent ignition performance. The use of iridium and copper materials contributes to extended service life. While specific warranty details may vary, Denso products typically come with manufacturer-backed quality assurance to support customer confidence in fitment and function.

About the Denso Iridium Power Product Line

The Iridium Power line from Denso focuses on delivering spark plugs with iridium-tipped center electrodes, which provide enhanced durability and stable ignition performance. This product line is designed to improve throttle response and fuel efficiency compared to conventional spark plugs. The 5337 model exemplifies these benefits with its advanced electrode materials and precise engineering, making it suitable for performance-oriented vehicles such as those from Ferrari and Dodge.