Denso 5325 Spark Plug

Overview of Denso Iridium Power Spark Plug 5325

The Denso Iridium Power spark plug 5325 is engineered for reliable ignition performance across a wide range of vehicles including Buick, Chevrolet, Ford, and Mercedes-Benz 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 1.1 mm and tapered seat type for secure fitment
• 16 mm hex size and 14 mm thread diameter for compatibility with various engines
• Manufacturer heat range 16 suitable for specific engine requirements
• 18 mm reach length ensuring proper installation depth
• Resistance rating of 5000 ohms to reduce electrical noise interference

About the Iridium Power Brand Line

The Denso Iridium Power line focuses on delivering spark plugs with iridium-tipped electrodes that provide consistent ignition and longer service life compared to conventional plugs. The iridium tip in part number 5325 enhances spark efficiency and durability, making it suitable for secondary ignition systems in many domestic and import vehicles.

Technical Description and Features

This spark plug features a copper core center electrode that ensures excellent thermal conductivity and stable performance under various operating conditions. The nickel ground electrode with a tapercut and u-groove tip design increases spark exposure, promoting better combustion. The single ground electrode configuration and a pre-gap size of 1.1 mm are optimized for precise ignition timing. The tapered seat type and 18 mm reach provide a secure and proper fit in compatible engines. With a resistance of 5000 ohms, this spark plug helps minimize radio frequency interference, supporting smooth engine operation.

Compatible Vehicles and Applications

• Compatible with Buick, Cadillac, Chevrolet, Ford, GMC, Hummer, Isuzu, Jaguar, Lincoln, Mazda, Mercedes-Benz, Mercury, Oldsmobile, Pontiac, Saab, and Saturn vehicles
• Fits models such as Chevrolet Silverado 1500, Ford F-150, Cadillac Escalade, Buick LaCrosse, and Mercedes-Benz 300E
• Suitable for secondary ignition systems requiring a 16 mm hex size and 14 mm thread diameter spark plug
• Ideal for vehicles needing a heat range 16 spark plug with an 18 mm reach

Common Issues Addressed by Denso Iridium Power 5325

• Misfires caused by worn or inefficient spark plugs
• Reduced fuel efficiency due to incomplete combustion
• Engine hesitation or rough idling
• Difficulty starting the engine in cold conditions
• Electrical interference affecting onboard electronics

Installation Notes and Tips

• Ensure the spark plug gap is set to 1.1 mm before installation
• Use a torque wrench to tighten the spark plug to manufacturer specifications to avoid damage
• Check compatibility with your vehicle’s make and model, especially for thread diameter and reach
• Inspect the ignition system components for wear when replacing spark plugs
• Apply anti-seize compound on threads if recommended by the vehicle manufacturer

Quality Assurance and Warranty

Denso manufactures the Iridium Power spark plug 5325 to meet strict quality standards, ensuring consistent performance and durability. The use of iridium and copper materials supports long service life and reliable ignition. While specific warranty details may vary, Denso products typically come with manufacturer-backed warranties covering defects in materials and workmanship.