Denso 3442 Spark Plug

Overview of Denso Iridium Long Life (SIP) Spark Plug 3442

The Denso Iridium Long Life (SIP) spark plug, part number 3442, is engineered for reliable ignition performance in a range of vehicles including Infiniti, Jaguar, Land Rover, Mercedes-Benz, Nissan, and Subaru models. Designed with advanced materials and precise specifications, this spark plug supports efficient combustion and engine longevity.

• 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
• Resistance rating of 5000 ohms to reduce electrical noise
• Hex size of 14.3 mm for standard installation tools
• Manufacturer heat range of 22 suitable for various driving conditions

About 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, these spark plugs are designed to withstand high temperatures and resist wear. This combination supports consistent engine starts and efficient fuel combustion, making it suitable for performance and luxury vehicles such as the Mercedes-Benz C63 AMG and Infiniti Q50.

Technical Details and Compatibility

Part number 3442 features a needle-to-needle ground electrode configuration with a platinum needle tip, which improves spark precision and reduces misfires. The copper core center electrode enhances electrical conductivity, while the nickel ground electrode core provides durability. The flat seat design and 12 mm thread diameter ensure compatibility with a variety of engines. This spark plug is compatible with models including the Nissan Altima, Subaru Forester, Jaguar XF, Land Rover Range Rover Sport, and multiple Mercedes-Benz AMG variants.

Applications and Problem Solving

• Improves ignition reliability in vehicles experiencing misfires or rough idling
• Reduces electrode wear for longer service intervals
• Enhances fuel efficiency by promoting complete combustion
• Minimizes electrical interference with a 5000 ohm resistance rating
• Supports stable engine performance in high-demand driving conditions

Installation Notes and Tips

When installing the Denso 3442 spark plug, ensure the pre-gap size of 1.1 mm is maintained for optimal ignition. Use a 14.3 mm socket for proper torque application. The flat seat design requires careful seating to avoid leaks. It is recommended to replace spark plugs in sets to maintain balanced engine performance. Always consult the vehicle’s service manual for specific torque specifications and installation procedures.

Quality Assurance and Warranty

Denso spark plugs, including the Iridium Long Life (SIP) 3442, are manufactured to meet strict quality standards. The use of iridium and platinum materials ensures durability and consistent performance. While specific warranty details may vary, Denso products typically come with manufacturer-backed quality assurance to support reliability and customer confidence.