Denso 3247 Spark Plug

Reliable Ignition Performance for Acura, BMW, Ford, and More

The Denso Double Platinum 3247 spark plug is engineered to deliver consistent ignition performance for a wide range of vehicles including Acura Accord, BMW 550i, Ford F-150, and Honda Civic. Designed with durable platinum tips and a copper core, this spark plug supports efficient combustion and long service life.

• Double platinum chip on ground electrode and platinum center electrode tip for enhanced durability
• 5000 ohm resistance to reduce electrical noise and protect ignition components
• Copper center electrode core for improved conductivity and heat dissipation
• Standard ground configuration with nickel ground electrode core
• Flat seat type with 14mm thread diameter and 19mm reach for precise fitment
• Pre-gap size of 1.1 mm optimized for reliable spark delivery
• Hex size of 16.0 mm for easy installation and removal
• Manufacturer heat range rating of 20 suitable for various driving conditions

About the Denso Double Platinum Spark Plug Line

The Double Platinum line from Denso features spark plugs with platinum on both the center and ground electrodes. This design enhances wear resistance and maintains a stable spark gap over time, contributing to consistent engine performance and fuel efficiency. The 3247 part number is part of this line, offering a balance of durability and ignition reliability for secondary ignition systems.

Technical Details and Compatibility

The Denso 3247 spark plug incorporates a copper core center electrode with a platinum tip, which improves thermal conductivity and spark efficiency. The ground electrode features a platinum chip tip over a nickel core, providing resistance to electrode wear. With a 1.1 mm pre-gap and a flat seat design, this spark plug fits securely in engines requiring a 14 mm thread diameter and 19 mm reach. Compatible vehicles include Acura Accord, BMW 550i, Ford F-150, Honda Civic, Jeep Grand Cherokee, Mazda MPV, Mitsubishi Raider, Ram 1500, and others.

Common Applications and Problem Solving

• Restores smooth engine starting and consistent ignition in Acura Accord and Honda Civic models
• Reduces misfires and rough idling in BMW 550i and 650i engines
• Improves fuel efficiency and throttle response in Ford F-150 and Ram 1500 trucks
• Addresses spark plug wear and gap erosion in Jeep Grand Cherokee and Dodge Durango
• Supports reliable ignition in Mazda MPV and Mitsubishi Raider vehicles

Installation Notes and Tips

Ensure the engine is cool before removing old spark plugs. Use a torque wrench to tighten the Denso 3247 spark plug to the manufacturer’s specifications to avoid damage. The 16 mm hex size allows for standard spark plug socket compatibility. Verify the pre-gap of 1.1 mm before installation, although the plug comes pre-gapped. Proper installation helps maintain optimal ignition performance and prevents misfires.

Quality Assurance and Warranty

Denso spark plugs, including the Double Platinum 3247, are manufactured to meet OEM standards for fit, form, and function. The use of platinum and copper materials ensures durability and consistent performance. While specific warranty details may vary, Denso products typically come with a limited warranty against manufacturing defects, providing confidence in product reliability.