Denso 5349 Spark Plug

Reliable Ignition Performance for Select GM and More Vehicles

The Denso Iridium Power 5349 spark plug is engineered to deliver consistent ignition and efficient combustion for a wide range of vehicles including Buick, Chevrolet, Cadillac, and Jeep models. Designed with advanced materials and precise specifications, this spark plug supports optimal engine performance and durability.

• Iridium center electrode tip for enhanced durability and stable spark
• Tapercut, u-groove ground electrode tip design for improved ignitability
• Copper core center electrode for excellent thermal conductivity
• Nickel ground electrode core material with standard ground configuration
• Pre-gap size of 1.1 mm and tapered seat type for precise fitment
• Thread diameter of 14.00 mm and reach of 25.00 mm for compatibility
• Hex size 16.0 mm for easy installation
• Manufacturer heat range 16 suitable for various driving conditions
• Resistance rating of 5000 ohms to reduce electrical noise interference

About the Denso Iridium Power Spark Plug Line

The Iridium Power line by Denso focuses on delivering spark plugs with iridium-tipped electrodes that provide a stable and reliable spark. This technology enhances ignition efficiency and contributes to smoother engine operation. The 5349 part number is part of this line, combining iridium with a copper core center electrode to balance durability and thermal performance, making it suitable for many GM and other compatible vehicles.

Technical Details and Compatibility

The Denso 5349 spark plug features a single ground electrode with a tapercut and u-groove tip design, which helps improve ignitability and combustion efficiency. The nickel ground electrode core and copper center electrode core materials ensure effective heat dissipation and longevity. With a pre-gap size of 1.1 mm and a tapered seat, this spark plug fits securely in engines requiring a 14 mm thread diameter and 25 mm reach. It is compatible with various models from Buick, Cadillac, Chevrolet, Chrysler, Dodge, GMC, Hummer, Isuzu, Jeep, Oldsmobile, Pontiac, Saab, Saturn, and Volkswagen, including popular vehicles like the Chevrolet Silverado 1500, Jeep Grand Cherokee, Cadillac Escalade, and Buick Regal.

Common Applications and Problem Solving

• Restores consistent ignition in engines experiencing misfires
• Improves fuel efficiency by ensuring complete combustion
• Reduces engine hesitation and rough idling
• Helps maintain smooth acceleration in vehicles like the Chevrolet Camaro and Dodge Charger
• Supports reliable starting performance in cold or variable weather conditions

Installation Notes and Tips

When installing the Denso Iridium Power 5349 spark plug, ensure the engine is cool to prevent damage to the threads. Use a torque wrench to tighten the spark plug to the manufacturer’s recommended specifications to avoid over-tightening or under-tightening. Verify the pre-gap size of 1.1 mm before installation, adjusting if necessary. The 16 mm hex size allows for standard spark plug socket compatibility, facilitating straightforward replacement in vehicles such as the Jeep Wrangler and Cadillac CTS.

Quality Assurance and Warranty

Denso manufactures the 5349 spark plug to meet strict quality standards, ensuring reliable performance and durability. The use of iridium and copper materials contributes to extended service life compared to conventional spark plugs. While specific warranty details may vary, Denso products typically come with manufacturer-backed quality assurance to support customer confidence in fitment and function.