Denso 3169 Spark Plug

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

The Denso 3169 spark plug from the U-Groove Conventional line delivers consistent ignition performance for a range of vehicles including Acura Accord, BMW 550i, Dodge Ram 1500, and Honda Civic. Designed with durable materials and precise specifications, this spark plug supports efficient combustion and engine reliability.

• Resistance: 5000 ohms for stable electrical flow
• Ground Electrode Tip Design: Standard for reliable spark delivery
• Ground Electrode Core Material: Nickel for durability
• Center Electrode Core Material: Copper for optimal conductivity
• Center Electrode Tip Material: Nickel to withstand high temperatures
• Pre-Gap Size: 1.1 mm for precise spark gap
• Hex Size: 16.0 mm for standard installation tools
• Manufacturer Heat Range: 20 suitable for various engine conditions
• Seat Type: Flat for secure sealing
• Thread Diameter: 14.00 mm and Reach: 19.00 mm for proper fitment

About the Denso U-Groove Conventional Spark Plug Line

The U-Groove Conventional spark plug line by Denso features a unique groove design on the center electrode that enhances ignitability and combustion efficiency. This design helps improve throttle response and fuel economy while maintaining compatibility with a wide range of vehicles. The 3169 part number represents a conventional style spark plug optimized for secondary ignition systems in many Acura, BMW, Dodge, Honda, Jeep, Mitsubishi, and Ram models.

Technical Details and Compatibility

The Denso 3169 spark plug is engineered with a copper core center electrode for excellent thermal conductivity and a nickel tip to resist wear. The single nickel ground electrode with a standard configuration ensures consistent spark generation. With a pre-gap size of 1.1 mm and a heat range of 20, this spark plug is suitable for engines requiring moderate heat dissipation. Its flat seat and 14 mm thread diameter with 19 mm reach ensure proper installation and sealing in compatible engines.

Common Applications and Problem Solving

• Restores engine misfire issues in Acura Accord and Honda Civic
• Improves ignition stability in BMW 550i and 650i models
• Supports reliable starting and performance in Dodge Ram 1500 and 2500
• Addresses rough idling and poor throttle response in Jeep Grand Cherokee
• Maintains efficient combustion in Mitsubishi Raider and Ram 3500

Installation Notes and Tips

When installing the Denso 3169 spark plug, ensure the engine is cool to prevent thread damage. Use a 16 mm socket wrench for proper torque application. Verify the pre-gap size of 1.1 mm before installation to maintain optimal spark performance. Tighten the spark plug to manufacturer specifications to avoid leaks or misfires. This spark plug is compatible with flat seat cylinder heads and requires a 14 mm thread diameter fit.

Quality Assurance and Warranty

Denso manufactures the 3169 spark plug to meet strict OEM standards, ensuring durability and consistent performance. The use of copper and nickel materials in the electrodes supports long service life under normal operating conditions. While specific warranty details may vary, Denso products typically come with manufacturer-backed quality assurance to support reliable ignition system operation.